Vol. 6, No. 9 September 1996 1996 Annual GSA TODAY Meeting A Publication of the Geological Society of America Technical Program Schedule Page 13 GSA Members, Fellows, and Other Colleagues: enhance the science Preregistration All GSA members—every one of us—should contribute to framework of the Deadline September 20 the Second Century Fund, GSA’s first major continuing fund Society—our tradi- See the titles and authors database drive. Here’s why. tional role—but also on GSA’s Web site: We live in a time of staggering challenges—the end of the to provide programs http://www.geosociety.org Cold War; the apparent end of the “social contract” between soci- that increase public ety as a whole and science; widespread misunderstanding of sci- awareness and ence, particularly geology; the electronic and information revolu- understanding of geology. These actions include: tion. The U.S. Bureau of Mines no longer exists; the USGS was • New efforts to enhance GSA’s publications. The Geology editors saved but has been downsized and combined with the National are communicating with science journalists who effectively trans- Biological Service (NBS). The Geological Survey of Canada has also late technical subjects for newspaper and magazine readers. The experienced major reorganization and downsizing. Some universi- Bulletin editors are actively seeking papers on a wide range of sub- ties and colleges have acted to abolish their geology departments. jects; manuscript submissions are up 20%. Numbers of subscrip- Geology is crucially important to society because: tions and citations for both Geology and Bulletin are substantially • It provides an attractive pathway into science knowledge essen- higher than for competing journals. Environmental and Engineering tial for children and adults; nearly everyone is interested in some Geoscience, a joint GSA–Association of Engineering Geologists aspect of geology, whether it be landscape, earthquakes, floods, vol- quarterly, and Hydrogeology Journal are offering some GSA mem- canic eruptions, impacts, dinosaurs, or just rocks, dirt, and fossils. bers the applied journal they requested. In response to member • Every citizen needs some basic understanding of Earth, which feedback, GSA Today is broadening its spectrum of topics. The geology can provide, in order to make intelligent decisions on Maps and Charts and Books editors have new ideas for future environment or resource issues or mundane decisions such as directions of those series. where to buy a home. • Science Awareness through Geoscience Education (SAGE) pro- • Some knowledge of geology enriches anyone’s appreciation gram. SAGE has dynamic initiatives underway in several areas: of the changing world around us. It’s “good for the soul.” The Earth-Space Center, integrating cutting-edge research, While most of us will agree on geology’s importance, we computer technology, and innovative teaching practices into new seem to have a difficult time getting our message across to the models for K–16 teaching; Geoscience Education Through Intelli- public at large. How can we do it better? gent Tutors (GET-IT) program, an interactive computer-based geo- GSA’s Council, officers, and science curriculum for the middle schools, and the Earth and science editors are working Space Science Technological Education Project (ESSTEP), an NSF- with headquarters funded professional development program for teachers of grades staff to respond 8–14; Partners for Education Program (PEP), which fosters K–12 to these issues. partnerships between educators and geoscientists and collabora- They are try- tions with other scientific societies, government agencies, and ing not businesses. Its projects include producing exciting high-quality only to educational programs at GSA annual and section meetings; coop- erative efforts with other groups to develop and support geo- Support science programs aimed at underrepresented minorities; and col- Support laboration with the National Park Service and other societies to enhance public understanding of the geology of national parks and monuments; development, with support of the Department of Energy, of workshop modules to help aid understanding of standards-based education and how it can be used to improve YourYour K–12 teaching and learning; and participation in an NSF-funded initiative in Colorado to develop a community-involvement pro- gram about standards-based education. • Institute for Environmental Education (IEE), which sponsors SocietySociety environmental forums at GSA annual and section meetings, media workshops for geoscientists, and the Roy Shlemon Applied Geology Mentor Program; guides the GSA Congressional Science Eldridge Moores, Fellow program; promotes the Geology and Environment Public President , GSA Outreach Program (GEPOP) of 300 geoscientists volunteering to serve in environmental problem-solving; and facilitates gather- ings of diverse groups to address environmental issues, such as

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SECOND CENTURY FUND

EARTH ◆ EDUCATION ◆ ENVIRONMENT IN THIS ISSUE GSA TODAY September Vol. 6, No. 9 1996 Support Your Society...... 1 Annual Meeting Co-Sponsors ...... 12 Imaging Laurentide Ice Sheet Annual Meeting Technical Program ..... 13 GSA TODAY (ISSN 1052-5173) is published Drainage into the Deep Sea: Impact 1997 Section Meetings— monthly by The Geological Society of America, Inc., on Sediments and Bottom Water .. 3 Northeastern ...... 22 with offices at 3300 Penrose Place, Boulder, Colorado. Washington Report ...... 8 South-Central–Rocky Mountain ...... 24 Mailing address: P.O. Box 9140, Boulder, CO 80301- 9140, U.S.A. Periodicals class postage paid at Boulder, Penrose Conference Scheduled ...... 9 Research Grants Awarded ...... 26 Colorado, and at additional mailing offices. Postmas- About People ...... 9 Bulletin and Geology Contents ...... 28 ter: Send address changes to GSA Today, Membership Services, P.O. Box 9140, Boulder, CO 80301-9140. 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2 GSA TODAY, September 1996 Imaging Laurentide Ice Sheet Drainage into the Deep Sea: Impact on Sediments and Bottom Water

Reinhard Hesse*, Ingo Klaucke, Department of Earth and Planetary Sciences, McGill University, Montreal, Quebec H3A 2A7, Canada William B. F. Ryan, Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964-8000 Margo B. Edwards, Hawaii Institute of Geophysics and Planetology, University of Hawaii, Honolulu, HI 96822 David J. W. Piper, Geological Survey of Canada—Atlantic, Bedford Institute of Oceanography, Dartmouth, Nova Scotia B2Y 4A2, Canada NAMOC Study Group†

ABSTRACT the western Atlantic, some 5000 to 6000 State-of-the-art sidescan-sonar imagery provides a bird’s-eye view of the giant km from their source. submarine drainage system of the Northwest Atlantic Mid-Ocean Channel Drainage of the ice sheet involved (NAMOC) in the Labrador Sea and reveals the far-reaching effects of drainage of the repeated collapse of the ice dome over Pleistocene Laurentide Ice Sheet into the deep sea. Two large-scale depositional Hudson Bay, releasing vast numbers of ice- systems resulting from this drainage, one mud dominated and the other sand bergs from the Hudson Strait ice stream in dominated, are juxtaposed. The mud-dominated system is associated with the short time spans. The repeat interval was meandering NAMOC, whereas the sand-dominated one forms a giant submarine on the order of 104 yr. These dramatic ice- braid plain, which onlaps the eastern NAMOC levee. This dichotomy is the result of rafting events, named Heinrich events grain-size separation on an enormous scale, induced by ice-margin sifting off the (Broecker et al., 1992), occurred through- Hudson Strait outlet. At the upslope end of the mud system, fine, suspended sedi- out the North Atlantic and flooded the ment was dispersed by buoyantly rising meltwater plumes and entrained by the ocean north of 40°N with icebergs. south-flowing Labrador Current. Deposition from the turbid surface plumes blan- Heinrich events were associated with keted the continental slope south of the strait, whose high relief was subsequently short-term climate change (Bond et al., created by retrograde canyon erosion. Remobilization of this fine-grained slope sed- 1993) because they caused suppression iment created the mud-rich NAMOC. In contrast, bedload-rich meltwater dis- of the conveyor-belt circulation. The charges generated sandy turbidity currents on the low-relief slope off the Hudson freshwater lid from the melting icebergs Strait, which basinward formed the braid plain. Periodic surging of the Hudson prevented deep-water formation in the Strait ice stream, possibly related to subglacial-lake outburst flooding that triggered Norwegian Sea, which stopped the Gulf extraordinary large, bedload-rich meltwater discharges, released unusual quantities Stream from penetrating northward, thus of icebergs that left their trace in Heinrich layers rich in ice-rafted debris and triggering short-term Northern Hemi- marked times of short-term climate cooling. The injection of large volumes of fresh sphere cooling (Broecker, 1994; Paillard or brackish water into the ocean bottom circulation may be a side effect of Hein- and Labeyrie, 1994). rich events in the deep sea. SEA-FLOOR MORPHOLOGY AND CHANNEL GEOMETRY INTRODUCTION change through the thermohaline circula- Establishing seascape morphology Pleistocene continental ice caps tion may be coupled with a similarly pro- with high precision by sonar imaging is a shaped the surface of Earth more pro- nounced impact on deep-sea sedimenta- fundamental first step in interpreting sea- foundly than any other geologic phe- tion for the Pleistocene Laurentide Ice floor evolutionary processes (e.g., Macdon- nomenon of comparable duration. Their Sheet and neighboring Labrador Sea. ald et al., 1993). To do this, state-of-the-art geomorphic effects on land are best sidescan-sonar imagery and swath known from their smaller cousins, the HUDSON STRAIT AND THE bathymetry were acquired using the Alpine mountain glaciers, but these give NAMOC SUBMARINE DRAINAGE HAWAII MR-1 (Hawaii Institute of Geo- no idea of the extent to which large, land- SYSTEM physics Acoustic Wide-Angle Imaging based ice sheets have shaped the ocean The Hudson Strait played a unique Instrument Mapping Researcher 1) system, floors adjacent to ice margins. The far- role during the late Pleistocene as a single the successor of SeaMARC II (Rognstad, reaching marine influence of ice sheets, major ice-sheet outlet. Through this out- 1992), on Hudson cruise 93-025. The sys- which we have documented in sidescan let, the subglacial drainage system of the tem is towed 70-80 m below the water sur- sonar imagery, is little known. Our under- Hudson Bay area, a 3–4 x 106 km2 area face at 8-9 kn with the sidescan sonar standing of the role of continental ice (Fisher et al., 1985; Hughes, 1987) com- operating at frequencies of 11 and 12 kHz, sheets in Pleistocene paleoclimate change posing the northeastern sector of the Lau- respectively on the port and starboard has recently changed dramatically with rentide Ice Sheet, was connected with the sides. Simultaneous deployment of 3.5 recognition that ice sheets may control basin-wide submarine drainage system of kHz and airgun vertical seismic systems short-term climate variations through the Northwest Atlantic Mid-Ocean Chan- makes this the most efficient remote- direct ocean-atmosphere feedback nel (NAMOC) on the Labrador Slope and sensing package for deep-sea floor surveys. (Broecker, 1994), rather than merely basin floor (Hesse et al., 1987; Hesse and Approximately 7000 km of real-time data record orbitally forced climate change. Rakofsky, 1992). The NAMOC extends covering 140 000 km2 of seafloor were The role of ice sheets in short-term climate nearly 4000 km from 61°N off the Hudson obtained and used to construct up to six- Strait to 37°N in the North American Basin track-wide mosaics of parts of the NAMOC (Chough and Hesse, 1976). Combined (each track being 20 km wide). with the >2000-km-long subglacial part on The resulting 2500-km-long and up to *Also at: Institut für Allgemeine und Angewandte land, this is one of the world’s longest Geologie, Ludwig Maximilians Universität, Munich, 120-km-wide corridor of sidescan imagery interconnected Pleistocene land-sea Germany. along the course of NAMOC (Figs. 1 and †Saeed Khodabakhsh, Larry A. Mayer, and shipboard drainage systems. Through its channels, 2) provides a bird’s-eye view of the ocean participants J.-F. Boily, B. Chapman, R. B. Davis, glacially derived sediments were trans- J. R. Erickson, D. J. Johnson, C. Keeley, B. Konyukhov, floor diagonally across the Labrador Sea. C. Olson Major, K. Parlee, A. Peslier, S. Renaud, ported as far as the Sohm Abyssal Plain in S. Ryan, K. L. Sender, R. Sparkes, K. Wagner, and J. S. Won. Ice Sheet Drainage continued on p. 4

GSA TODAY, September 1996 3 Ice Sheet Drainage continued from p. 3 depth. Canyons (called channels on the gradient 1:1000 or less). The channel rise and basinward) are dramatically fewer floor appears as a meandering 2- to 3-km- Four distinct morphologic regions can be in number and have less relief than on the wide band of low-backscatter energy with recognized. slope (Fig. 3B), and the NAMOC appears as low sinuosity (meander radius ranges from Region 1: Continental slope in a discernible trunk channel of the 17 to 55 km, averages 25 km). Tributaries <3000 m water depth (west of 57°N, drainage system. No upslope canyon can run parallel to the NAMOC for several sea-floor gradient >1:500). A dendritic be singled out as the main NAMOC feeder. hundred kilometers (Hesse, 1989) but pattern of closely spaced tributary canyons On the sidescan mosaic in Figure 2, the eventually join the main channel (conflu- with increasingly complex upslope most prominent aspect between about 57° ence with tributary E/F at about 57°40'N; branching (Fig. 2) shows steep canyon and 54°30'W is the dichotomy between Fig. 1). Bright areas in the channel are walls with spectacular relief of up to 700 the high-backscatter-energy (light areas) interpreted as slumps or point bars. The m (Fig. 3A) alternating with low-relief sec- muddy levees of the NAMOC, and the point bars are concentrated on, but not tors. Canyons in the low-relief regions are low-backscatter (dark areas) sand and restricted to, inner meander bends on the <120 m deep and have broad floors gravel-rich plains to the northeast. right channel wall. We imaged washover flanked by broad ridges or levees. Low- Lithologies were established by piston fans, hanging submarine valleys, and relief sectors occur in front of glacial out- coring (Fig. 4). chute pools in this region for the first time lets, seaward of the shelf break (Hesse and Region 3: Labrador Basin floor in the deep sea (Klaucke and Hesse, 1996). Klaucke, 1995), whereas high-relief sectors south of 59°45'N and below 3400 m The most surprising morphologic typically lie south of these outlets. water depth to confluence with H feature of the entire mosaic is the curved Region 2: Continental rise tributary and Imarssuak Mid-Ocean alternating high- and low-backscatter- between 3000 and 3400 m water Channel at 56°N (average sea-floor energy streaks on the sand and gravel

Figure 1. Mosaic of HAWAII MR-1 sidescan sonar images (6 ship tracks, each 20 km wide) in the central Labrador Sea (for location see inset in Fig. 2, southern part of red corridor) showing submarine braid plain with curved ridges and sand and gravel bars (bright) immediately east of the meandering NAMOC with its muddy levees. The imagery is dis- played in normal polar- ity—i.e., low-backscatter reflectivity appears dark and high-backscatter reflectivity bright.

4 GSA TODAY, September 1996 plain beyond the distal edge of the eastern braid plain. The braid plain forms the and a few meters high. Evidence of ero- NAMOC levee. This pattern corresponds southern, distal continuation of the sion can be seen where the furrows start to the depositional low-amplitude chan- nonbraided sand-gravel plain in region 2. abruptly upstream. The prevalent curva- nel-and-bar or lobe, or the erosional ridge- The ridges or bars (bright streaks) are up to and-furrow topography, of a submarine 10 km long, several hundred meters wide, Ice Sheet Drainage continued on p. 6

Figure 2. Mosaic of HAWAII MR-1 sidescan sonar images (4 ship tracks wide) starting at 61°W on the upper Labrador slope off the Hudson Strait. IMOC is Imarssuak Mid-Ocean Channel; PTB is submarine point bar, SL is slump; SMT is seamount.

Figure 3. Sleeve-gun (655 cm3 = 40 in.3) seismic profiles from Labrador slope and basin. Locations shown in Figure 5. A. Profile along the upper Labrador slope in about 1500 m water depth (segment 1). On the high-relief sector (southern half of profile), parallel undulating low-amplitude reflections, which are grouped into packages by a few higher-amplitude reflections, and deep sound penetration (up to 800 ms two-way traveltime or 720 m subbottom depth, assuming a sound veloc- ity of 1.8 km/s), are characteristic of turbid surface- plume and pelagic-dominated sedimentation (southern two to three tracks on upper slope, Fig. 2). In the low-relief sector to the north, more highly reflective sediment beneath the canyon floors indicates sand as canyon fill. The ridges and levees consist of large pockets of weakly stratified to transparent sediment with a few distinct reflec- tions and deep sound penetration up to 900 ms. B: Mid-slope section (segment 2) showing reduced number and relief of tributary canyons compared with profile A. Canyon fill (SCF) is sand-rich, with the exception of canyons NBA and NCAA, which contain debris-flow deposits (DFD). Seismic reflec- tion character and penetration beneath the ridges are very similar to those of profile A (from Hesse, 1992, Fig. 3). C: Basin section (segment 3) showing the highly asymmetrical NAMOC levees, which return numerous parallel, low-amplitude reflections and reveal deep penetration, as in the high-relief sector of segment 1 in profile A, although the levee facies results from spillover by fine-grained turbidity currents. The sand facies of the eastern braid plain (BP) onlaps (OL) the muddy eastern NAMOC levee truncating it. Slight lateral migration of the meandering NAMOC is indicated by a former channel margin (CM); however, the thick sand facies (DCF) under the NAMOC floor suggests relative stability of the channel position.

GSA TODAY, September 1996 5 Ice Sheet Drainage continued from p. 5 ture of the streaky pattern toward the main channel where the east NAMOC levee is absent (between 57° and 56°30'N) shows that the levee was eroded by currents flowing from the braid plain into the channel, not vice versa. The occurrence of the submarine braid plain distal to the upslope non- braided sand-and-gravel plain (region 2) is contrary to expectation and could be an artifact of sidescan penetration through mud cover. Piston cores from the braid plain show a 1–1.5-m-thick Holocene mud blanket above massive sand layers up to several meters thick. The sidescan signal could have penetrated the thinner “mud screen” in region 3, but not the thicker mud cover near the ice outlet in region 2. Region 4: NAMOC segment between 56°N and 44°30'N below 3800 m water depth (average sea- floor gradient: 1:2000). In this region (not shown in Fig. 1), NAMOC meander radii increase from 50 km north of 54°S, to >50 km farther south. Some channel Figure 4. Piston cores from the submarine braid plain showing massive or graded sand and gravel layers reaches are straight (in the sense of Clark up to several meters thick overlain by a 1-m-thick Holocene pelagic lutite layer. IRD is ice-rafted debris. et al., 1992), whereas in others, seamounts and basement structures cause sharp, gen- erally north-northwest–south-southeast to density barrier and form density under- or above the Labrador Sea ice were west-east deflections as the channel enters flows (Mulder and Syvitski, 1995). These entrained by the south-flowing Labrador and leaves fracture zones. turbidity currents carried sandy sediment Current. Typical turbid-plume deposits well beyond the upper or mid-slope (as far (Fig. 6) have been identified in piston INTERPRETATION: EFFECTS OF as region 3 and probably beyond) and fed cores from within 20 km of the assumed SEDIMENT INPUT AND TRANS- the sand and gravel plains east of the ice-margin position. The remainder of the PORT MECHANISMS ON SEA- NAMOC. The plains adjacent to the slope is predominantly underlain by fine- FLOOR MORPHOLOGY NAMOC are best explained as forming grained sediments with equal parts of The profound changes and juxtaposi- by deposition of sand-rich sheet flows hemipelagic sediments and muddy tion of sea-floor morphologies described originating in Hudson Strait and circum- spillover turbidites. Subordinate con- above can be attributed to sediment deliv- venting the NAMOC and its tributaries, stituents are from ice rafting (Fig. 6, B, and ery and transport mechanisms during rather than by flooding from the trunk D), including distinct Heinrich layers glacial episodes. The transfer of the channel. Some of the flows were appar- (Wang and Hesse, 1996), and moving glacially derived sediment to the marine ently of unusually large volume (see bottom layers of suspended sediment environment requires two major steps: below). These currents overflowed the called nepheloid-layer deposits (Fig. 6). (1) delivery to the ice margin and upper low-relief slope in front of the strait and The modern high relief of the slope slope by primary transport mechanisms, cut shallow channels into the substrate has been generated by retrograde syn- and (2) slope erosion and redeposition by of the debris-flow deposits on the upper or postdepositional erosion involving secondary transport mechanisms. The slope (Fig. 3A). headward and sideward gullying in the upper-slope dichotomy of low- vs. high- canyons producing the present-day den- relief sectors (Fig. 3A), which is projected High-Relief Morphology: Turbid- dritic, high-relief canyon pattern. Remobi- basinward by the submarine braid-plain Plume Deposition, Slope Erosion lization of sediment by slumping, debris vs. leveed-channel dichotomy (Figs. 3B, 5) and Redeposition flow, and turbidity current formation has is the result of a giant grain-size fractiona- The normal mode of turbidity-current been the main sediment source for the tion process at the ice margin. When generation in an ice-marginal environ- NAMOC, whose muddy levees in regions detritus carried by the glacier and its rivers ment is secondary transport due to remo- 2 and 3 formed by spillover from the fine- reaches the sea, the suspended load is bilization of glacial-front upper-slope sedi- grained tops of turbidity currents (same separated from the bedload by processes ment, not meltwater flooding. To a large spillover turbidites as in Fig. 6D, but appropriately named ice-margin sifting. extent, the upper-slope region south of without ice-rafted debris). the Hudson Strait outlet received sediment Low-Relief Morphology: Transport as a mud blanket deposited by particle-by- Channelized Turbidity Currents by Debris Flows and “Primary” particle settling. Meltwater entering the The change from the depositional- Turbidity Currents sea, even when heavily loaded with sus- erosional topography of the slope to a The vast volumes of coarse material pended sediment, rose buoyantly to the mostly depositional topography on the melted from the huge Hudson Strait surface, forming turbid surface plumes—a rise is marked by the appearance of chan- glacier tongue led to the production of well-known phenomenon in modern tide- nels with true depositional levees built by giant debris flows that had a smoothing water glaciers (Syvitski et al., 1987; Pfir- overbank deposition from turbidity cur- effect on the relief. Periodic meltwater man and Solheim, 1989; Lemmen, 1990). rents. Levee development peaked along discharge peaks caused heavy sand-laden Meltwater plumes jetting out from under the upper NAMOC in regions 2 and 3 freshwater flows to break the seawater

6 GSA TODAY, September 1996 (upstream from the entrance of sandy flows from the braid plain) where levees reach a maximum height of 80 m above the adjacent basin plains, and widths up to 40 km to the west and 20 km to the east of the NAMOC (Fig. 3C). Down-channel decreases of levee relief from 80 to 30–10 m and channel depth from 200 to 140–75 m imply that flow parameters decreased down-flow. The difference in levee height between the west and east levees also decreases from a maximum of 90 m to 30 m in the proximal to the distal channel reaches, signaling the decreasing effect of Coriolis force with latitude together with decreasing flow velocities and densities in the distal channel. Quantification of flow parameters by using imaged channel geometry (width, meander radii) and a digital terrain model generated from the bathymetric data (channel depth, levee asymmetry) provide information on flow-velocity variation, both longitudinally along the flow path and vertically within the flows (Klaucke, 1995). Equilibrium-flow conditions have been established only for the first 350 km Figure 5. Facies distribution map, Labrador slope and basin, based on seismic profiles and ground- of region 3. Low flow velocities of 0.8 m/s truthing piston cores. that decrease to 0.05 m/s, calculated for region 3 bankfull flows, are flow-top veloc- ities (Klaucke, 1995). Gravel-sized chan- nel-fill sediments in the NAMOC along regions 2 and 3 (Chough et al., 1987) give maximum calculated bottom velocities of 6.5 to 8 m/s (for the lower 50 to 80 m of up to 200-m-thick flows). These higher bottom velocities apparently shaped the overall channel geometry, including the low-sinuosity meander pattern.

RELATION BETWEEN BRAID- PLAIN DEVELOPMENT, HEINRICH EVENTS, AND SHORT-TERM CLIMATE CHANGE The development of the submarine braid plain in the Labrador Basin adjacent to the NAMOC (Fig. 5) sheds light on a possible relation between the injection of sand-laden meltwater by turbidity currents AB C D and Heinrich ice-rafting events. Some of Figure 6. X-radiographs of glaciomarine depositional facies from the Labrador slope and basin. A: Tur- the turbidity currents that deposited sand bid surface-plume deposits; B: hemipelagic sediment with ice-rafted debris; C: nepheloid-layer deposits; on the braid plain must have been unusu- D: overbank levee spillover turbidites alternating with laminae of ice-rafted debris. ally large. After having traveled more than 1000 km from the Hudson Strait outlet, lakes were dammed by end moraines, or injected into the deep-ocean circulation. some of them were still powerful enough by the ice itself, surging of the Hudson This may have affected deep-water density to erode the east NAMOC levee between Strait ice stream during Heinrich events and, accordingly, the deep conveyor-belt 57° and 56°30’N. There, they entered the could have cut the barriers, causing the circulation in the Atlantic, at least tem- main channel and traveled down channel catastrophic emptying of the lakes. Alter- porarily. This possibility has not been an unknown distance, probably to the natively, rising lake levels may have lifted considered previously in the climate-feed- channel terminus on the Sohm Abyssal the ice dams and been the cause that trig- back scenarios, which have recently Plain. These flows deposited sandy over- gered ice surging and Heinrich events. The incorporated Heinrich events as short- bank sediment all along the east levee of ensuing subglacial lake outburst flooding term climate pacemakers. the distal channel (Klaucke, 1995). The events would have cut the gorges and only suitable reservoirs of appropriate size canyons now subaerially exposed as ACKNOWLEDGMENTS that could have released such very large spillways on Meta Incognita Peninsula on We are grateful for a careful, in-depth volumes of sediment and water are sub- the north coast of the strait (Johnson and review of this paper by John E. Damuth, glacial lakes in Hudson Strait and its Lauritzen, 1995). Large volumes of fresh critical comments by Andrew Hynes and drainage area. The former existence of or brackish water entrained in the result- these lakes is indicated by large depres- ing turbidity currents could have been sions (e.g., in the floor of the strait). If the Ice Sheet Drainage continued on p. 8

GSA TODAY, September 1996 7 WASHINGTON REPORT implies, only nuclear contamination was considered. This workshop documented Bruce F. Molnia that much less radioactive waste had been dumped into the far eastern marginal seas Washington Report provides the GSA membership with a window on the activities of the than into the Arctic marginal seas. One federal agencies, Congress and the legislative process, and international interactions that reason for this was that most of the high- could impact the geoscience community. In future issues, Washington Report will present level solid waste in the Russian Far East, summaries of agency and interagency programs, track legislation, and present insights into generally reactors and spent fuel rods of Washington, D.C., geopolitics as they pertain to the geosciences. mothballed nuclear submarines, were still in temporary storage at naval sites along the coastline. Even more problematic was the fact that a suitable reprocessing capa- tion-gathering activities. In 1992, after bility and the means to transport these Pristine No More learning that several million curies of highly radioactive materials do not exist. radioactive waste had been dumped by The proceedings of this workshop were Several recent reports have provided a the former Soviet Union into the Arctic’s released in May 1996, as the volume 9, variety of information indicating that marginal seas, the IARPC convened an fall/winter issue of Arctic Research of the human and natural changes are having a international workshop to identify the United States. significant impact on many of the north- breadth and sources of existing data and In June 1996, a follow-on workshop, ern and Arctic marginal seas. These areas information about Arctic contamination, cosponsored by the U.S. Geological include the Bering Sea, Kara Sea, Barents to identify major data gaps, and to deter- Survey, was held in Niigata, Japan. Its pur- Sea, Laptev Sea, Sea of Okhotsk, and Sea of mine whether specific Arctic contami- pose was to continue the multinational Japan. The human activities include nants present a risk to the environment, international dialogue on how to reduce dumping radioactive waste, overfishing, ecosystems, or human health in Alaska, the volume of radioactive waste stored in release of metals and other contaminants the Arctic, and the global environment. the Russian Far East. The proceedings of to the environment, and a variety of other The focus of the workshop was not only this workshop will be published early in actions. Radioactive waste has also been radioactive contamination, but also other 1997 in Arctic Research of the United States. dumped in the northernmost northwest contaminants that exist in and affect the The third report, “The Bering Sea Pacific Ocean. Arctic. Ecosystem,” 309 pages long, concluded Three reports—two released in the The result is a 311-page proceedings that during the past 50 years, natural past few months and one released last volume, which contains about 60 presen- changes in the ocean environment have year—clearly document what is known tations, including 12 papers and 10 combined with the effects of human har- about the extent of change to these north- abstracts by Russian experts. The work- vesting of whales, the taking of other ern areas. Two reports were released by the shop identified that a broad variety of marine mammals, such as seals, and over- U.S. Interagency Arctic Research Policy contaminants are found in the Arctic, fishing “to cause a cascading and possibly Committee (IARPC). They are “Workshop even though they are not used in that irreversible sequence of changes in the on Arctic Contamination” and “Proceed- area. For instance, natural transportation Bering Sea ecosystem.” These activities ings of the Japan—Russia—United States processes concentrate compounds like appear to have reduced the amount of Study Group on Dumped Nuclear Waste in DDT in the coastal Arctic even though high-quality food available to young the Sea of Japan, Sea of Okhotsk, and the they are not being used within a several marine mammals and birds. Nine recom- North Pacific Ocean.” The third report, thousand mile radius. The proceedings mendations are presented, including some “The Bering Sea Ecosystem,” released in volume, was released in May 1995, as the possible changes to the management of May 1996, was prepared by the Polar volume 8, spring issue of Arctic Research of the Bering Sea fishery. Research Board (PRB) of the National the United States. Both IARPC proceedings are available Research Council and published by the The second report, “Proceedings of at no cost from the Office of Polar Pro- National Academy Press. the Japan—Russia—United States Study grams at the National Science Foundation; The IARPC, a federal committee with Group on Dumped Nuclear Waste in the the PRB report may be purchased from the a membership composed of the 14 agen- Sea of Japan, Sea of Okhotsk, and the National Academy Press. For additional cies active in the Arctic, coordinates Fed- North Pacific Ocean,” expanded the geo- information, contact your Washington eral Arctic basic and applied research, graphic area of concern to the marginal Report editor ([email protected]). ■ monitoring efforts, and other informa- seas of the Russian Far East. As the title

Ice Sheet Drainage continued from p. 7 Broecker, W. S., Bond, G., Klas, M., Clark, E., and Hesse, R., 1989, “Drainage system” associated with mid- McManus, J., 1992, Origin of northern Atlantic’s Hein- ocean channels and submarine yazoos: Alternative to rich events: Climate Dynamics, v. 6, p. 265–273. submarine fan depositional systems: Geology, v. 17, Kirk Maasch, substantial editorial assis- p. 1148–1151. tance by Suzanne Kay, the cooperation of Chough, S. K., and Hesse, R., 1976, Submarine mean- dering talweg and turbidity currents flowing for 4000 Hesse, R., 1992, Continental-slope sedimentation adja- Captain Lewis, and the officers and crew km in the Northwest Atlantic Mid-Ocean Channel: cent to an ice margin. I. Seismic facies of Labrador of CSS Hudson, and major funding from Geology, v. 4, p. 529–533. Slope: Geo-Marine Letters, v. 12, p. 189–199. the Canadian Natural Science and Engi- Chough, S. K., Hesse, R., and Müller, J., 1987, The Hesse, R., and Klaucke, I., 1995, A continuous along- neering Research Council and the U.S. Northwest Atlantic Mid-Ocean Channel of the Labrador slope seismic profile from the Upper Labrador Slope, Sea. IV. Petrography and provenance of the sediments: in Pickering, K. T., et al., eds., Atlas of deep-water National Science Foundation. Canadian Journal of Earth Sciences, v. 24, p. 731–740. environments: Architectural style in turbidite systems: Chapman & Hall, p. 18–22. Clark, J. D., Kenyon, N. H., and Pickering, K. T., 1992, REFERENCES CITED Quantitative analysis of the geometry of submarine Hesse, R., and Rakofsky, A., 1992, Deep-sea Bond, G., Broecker, W., Johnson, S., McManus, J., channels: Geology, v. 20, p. 633–636. channel/submarine yazoo system of the Labrador Sea: A Labeyrie, L., Jouzel, J., and Bonani, G., 1993, Correla- new deep-water facies model: American Association of Fisher, D. A., Reeh, N., and Langley, K., 1985, Objective tion between climate records from North Atlantic sedi- Petroleum Geologists Bulletin, v. 104, p. 680–707. ments and Greenland ice: Nature, v. 365, p. 143–147. reconstruction of the Late Wisconsinan Laurentide Ice Sheet and the significance of deformable beds: Broecker, W. S., 1994, Massive iceberg discharges as triggers Géographie physique et Quaternaire, v. 39, p. 229–238. for global climate change: Nature, v. 372, p. 421–424. Ice Sheet Drainage continued on p. 9

8 GSA TODAY, September 1996 Penrose Conference Scheduled fax 505-255-5253, E-mail: haneberg@ nmt.edu; J. Casey Moore, Earth Sciences Board, University of California, Santa Cruz, Faults and Subsurface Fluid Flow: CA 95064, (408) 459-2574, E-mail: casey@ rupture.ucsc.edu; Laurel B. Goodwin, Fundamentals and Applications to Department of Earth and Environmental Science, New Mexico Tech, Socorro, NM Hydrogeology and Petroleum Geology 87801, (505) 835-5178, E-mail: lgoodwin@ nmt.edu; Peter S. Mozley, Department of September 10–15, 1997 Earth and Environmental Science, New Mexico Tech, Socorro, NM 87801, (505) A Geological Society of America Pen- faults and subsurface fluid flow. Partici- 835-5311, E-mail: [email protected]. rose Conference, “Faults and Subsurface pants will be returned to the Albuquerque Application deadline is March 1, Fluid Flow: Fundamentals and Applica- airport before noon on September 15. 1997. Invitations will be mailed to partici- tions to Hydrogeology and Petroleum The conference will be limited to pants by April 1, 1997. We will have a lim- Geology,” will be held September 10–15, 70 participants, who will be selected to rep- ited number of invited oral presentations, 1997, in Albuquerque and Taos, New resent a broad range of disciplines and geo- so that a significant part of the meeting Mexico. The conference will be a synopsis graphic areas of expertise. We encourage can be devoted to poster presentations of state-of-the-art field, laboratory, and interested graduate students to apply, and and informal discussions. computer modeling studies of the role of we will be able to offer some partial stu- Potential participants should send a faults as barriers to and conduits for sin- dent subsidies. The registration fee, which letter of application to William Haneberg gle- and multiphase fluid flow. Topics to will cover lodging, meals (except for first (address above), including a brief state- be addressed will include deformation of night’s dinner), ground transportation dur- ment of interest, the relevance of the rocks and sediments in fault zones; the ing the conference, field trip, and all other applicant’s recent work to the themes influence of deformation on fluid flow costs except personal incidental expenses, of the meeting, and the subject of any and transport phenomena; diagenetic is expected to be approximately $600 to proposed poster presentation. Although alterations and their feedback into $700. Participants will be responsible for E-mail inquiries to any or all of the con- hydrologic and structural processes; and transportation to and from the conference. veners are welcome, potential participants geological and geophysical imaging of Co-conveners are: William C. should submit two paper copies of their fault properties. We will emphasize both Haneberg, New Mexico Bureau of Mines application. E-mail letters of application fundamental research and application to & Mineral Resources, 2808 Central Avenue will not be considered. ■ problems such as ground-water supply, SE, Albuquerque, NM 87106, (505) 262-2774, ground-water contamination, petroleum migration, and petroleum production. Participants will be picked up at the About People Albuquerque airport and spend the evening of September 10 in Albuquerque, GSA Fellow Wallace S. Broecker, Lamont-Doherty Earth Observatory, and assemble the next morning for a field Columbia University, Palisades, New York, has been awarded the National Medal of trip to examine the relation between faults Science for his pioneering contributions in understanding chemical changes in the and ground-water flow in the Albuquer- ocean and atmosphere. que basin. Planned stops will highlight the Fellow Farouk El-Baz, Boston University, Boston, Massachusetts, is the 1996 structure and stratigraphy of the Cenozoic recipient of the AAPG Michel T. Halbouty Human Needs Award, for his contribu- basin-fill aquifer system; deformational tions in remote sensing to the search for natural resources in arid lands. features, paleoflow indicators, and zones Joining the Colorado School of Mines (Golden, Colorado) faculty are GSA of cementation along faults cutting Members Murray W. Hitzman (Charles Franklin Fogarty Distinguished Chair in unconsolidated basin-fill sediments; Economic Geology) and Neil F. Hurley (Charles Boettcher Distinguished Chair in and the hydrogeology of basin-bounding Petroleum Geology). faults. We will then travel to Taos, for Fellow John G. Vedder, Portola Valley, California, is the fourth recipient three days of oral presentations, poster ses- of the Dibblee Medal, presented by the Thomas Wilson Dibblee, Jr., Geological sions, and discussions concerning current Foundation, in recognition of extraordinary accomplishment in geologic mapping. and future research on the interrelation of

Ice Sheet Drainage continued from p. 8 Klaucke, I., and Hesse, R., 1996, Fluvial features in the Pfirman, S., and Solheim, A., 1989, Subglacial meltwater deep sea: New insights from the glacigenic submarine discharge in the open-marine tidewater glacier environ- Hesse, R., Chough, S. K., and Rakofsky, A., 1987, The drainage system of the Northwest Atlantic Mid-Ocean ment: Observations from Nordaustlandet, Svalbard Northwest Mid-Ocean Channel of the Labrador Sea. V. Channel in the Labrador Sea: Sedimentary Geology (in Archipelago: Marine Geology, v. 86, p. 265–281. Sedimentology of a giant deep-sea channel: Canadian press). Rognstad, M., 1992, HAWAII MR1: A new underwater Journal of Earth Sciences, v. 24, p. 1595–1624. Lemmen, D. S., 1990, Glaciomarine sedimentation in mapping tool: International Conference on Signal Pro- Hughes, T., 1987, Ice dynamics and deglaciation mod- Disraeli Fjord, high Arctic Canada: Marine Geology, cessing Technology ‘92, p. 900–905. els when ice sheets collapsed, in Ruddiman, W. F., and v. 94, p. 9–22. Syvitski, J. P. M., Burrell, D. C., and Skei, J. M., 1987, Wright, H. E. J., eds., North America and adjacent Macdonald, K. C., Scheirer, D. S., Carbotte, S., and Fox, Fjords: Processes and products: New York, Springer - oceans during the last deglaciation: Boulder, Colorado, P. J., 1993, It’s only topography: GSA Today, v. 3, no. 1, Verlag, 375 p. Geological Society of America, Geology of North Amer- p. 1, p. 24-25, no. 2, p. 29-31, p. 34–35. ica, v. K-3, p. 183–220. Wang, D., and Hesse, R., 1996, Continental slope sedi- Mulder, T., and Syvitski, J.P.M., 1995, Turbidity currents mentation adjacent to an ice-margin. II. Glaciomarine Johnson, R. G., and Lauritzen, S.-E., 1995, Hudson Bay- generated at river mouths during exceptional discharges to depositional facies on Labrador Slope and glacial cycles: Hudson Strait jökulhlaups and Heinrich events: A the world ocean: Journal of Geology, v. 103, p. 285–299. Marine Geology (in press). hypothesis: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 117, p. 123–137. Paillard, D., and Labeyrie, L., 1994, Role of the thermo- Manuscript received August 1, 1995; revisions received haline circulation in the abrupt warming after Heinrich Klaucke, I., 1995, The submarine drainage system of the October 31, 1995, January 18, 1996, June 11, 1996; events: Nature, v. 372, p. 162–164. ■ Labrador Sea: Result of glacial input from the Lauren- accepted June 18, 1996. tide Icesheet [Ph.D. thesis]: Montreal, Quebec, Canada, McGill University, 248 p.

GSA TODAY, September 1996 9 Institute for PEP TALK ENVIRONMENT MATTERS Environmental PEP Education Barbara L. Mieras, Partners for Education The Future Has Arrived: Program Manager Environmental Geoscience For All at the GSA Annual Meeting

GSA Members Daniel Sarewitz, IEE Director Here are three good reasons to look for the PEP materials in your 1996 mem- bership renewal packet: The growing importance of geoscien- James Otto, Associate Director, Insti- 1. The Partners for Education Program tists and geoscience information for envi- tute for Global Resources Policy, Colorado (PEP) needs feedback on GSA members’ ronmental problem-solving is reflected in School of Mines. “Effective Environmental involvement in K–12 geoscience educa- the technical sessions that will be held at Mining Legislation: An International tion; whether or not you’re a PEP member, the GSA Annual Meeting in Denver next Perspective.” please take a few minutes to fill out the month. By my count, there will be eight David Holm, Director, Colorado Water K–12 Geoscience Survey enclosed with symposia and 17 theme sessions that are Quality Control Division. “The Watershed- your membership materials and return it directly related to environmental issues. Based Approach for Addressing Water This represents fully a quarter of all proposed to us in the postage-paid envelope. Quality Impacts from Mining Activities.” technical sessions. 2. If you aren’t already a PEP member, While many of these 25 Geoffrey Plumlee, U.S. Geological please consider joining us to lend some events focus on purely technical questions, Survey. “The Environmental Benefits of support to K–12 geoscience education— quite a few are concerned with the applica- Effective Communication Between Earth it’s free, and it’s a priceless contribution! tion of geoscience information to political Scientists and Mining Regulators.” 3. New and continuing PEP members: decision-making, socioeconomic concerns, Ann Maest, Hagler Bailly Consulting. Would you be willing to help as an E-mail and education. The high proportion of ses- “Divining the Past: The Limitations of partner or PEP expert? You can join these sions devoted to environmental issues is a Current Methods for Determining Baseline efforts by returning the appropriate infor- powerful indicator of the future direction of Water Quality at Mine Sites.” mation on the card enclosed with your the geosciences. Maxine Stewart-Green, President, membership materials or by contacting us One of the kick-off events of the GSA Colorado State Land Board. “Regulatory at [email protected] or bklocek@ annual meeting is the IEE Annual Envi- Accommodation for Environmentally geosociety.org. Thank you. ronmental Forum. This year’s forum is Sound Mining—A Vision for the Future.” entitled “Prospects for the Future: Gold Scott Smith, Director, Environmental, Make your travel plans for the GSA and Water in the Earth System.” Gold and Health and Safety Policy, Coors Brewing 1996 Annual Meeting in Denver. We are water are the two most valuable natural Company. “Abandoned Mines: Pariahs or looking forward to a dynamic exchange of resources in the West, and the impact of Prizes? Banes or Blessings?” ideas and information—geoscience educa- hard-rock mining on water quality has Carol Russell, Community Involve- tion is one of four disciplinary categories proven to be one of the most controversial ment Team Leader, Environmental that received more than 200 abstracts. We and intractable environmental issues Protection Agency. “Smoothing Troubled also have a host of favorite special events facing the region. The IEE forum will Waters—A Scientific, Systematic View returning this year, including the Earth explore the history, politics, economics, of Mining Communities and Their Science Social Hour, the Rock Raffle (with and science of this difficult problem. Environment.” PEP coupons, of course), and the Share-A- This year’s forum speakers are involved Robert Moran, Woodward Clyde Thon. Please let us know if you have an on a daily basis with mining and environ- Consultants, will be the moderator. enticing rock, mineral, or fossil sample to mental quality issues. Through their collec- Other symposia and theme sessions donate to the Rock Raffle. In addition to tive experience, the forum will explore the sponsored or cosponsored by IEE at the 1996 the technical sessions and informal gath- political and economic context within GSA Annual Meeting: erings dealing with geoscience education which earth science information is used— throughout the meeting, education events and sometimes abused—while illustrating Symposia will be in full swing during the weekend the value of good communication among • Dinosaurs, Asteroids, Spotted Owls, and preceding the meeting, with workshops, earth scientists, policy makers, the private Humanity: An Evolving View of Ecosys- field trips, and other gatherings that PEP sector, and the public at large. tems and the Role of Science in Their educators and scientists will find especially The Annual Environmental Forum Management. (Monday p.m.) inviting. Please spread the word to your will include panel discussions and time for • Geoscience Information for Tomorrow’s partners and other K–12 educators. significant audience participation. The Markets: What Is Wrong with the Pre- Educators can get more information by forum will be held from 1:30 to 5:30 p.m. sent Products? (Cosponsored by the calling the GSA Education Department at on Sunday, October 27, in room A207-209 GSA International Division and the 800-824-7243 or (303) 447-2020, ext. 162. of the Colorado Convention Center, and Commission on the Management and If you don’t receive your PEP logo is open to the public. sticker for your registration badge before Application of Geoscience Information; Wednesday p.m.) the meeting opens, please pick one up at IEE Fifth Annual Environmental • Earth Science–Environmental the PEP booth at the entrance to the Forum: Speakers Exhibit Hall so everyone will know that Justice Summit. (Cosponsored by the you are a member of the PEP team. New Dave Shaver, Chief, Geologic GSA Committee on Geology and Public PEP members can also register at the Resources Division, National Park Service. Policy, GSA Committee on Minorities booth, and we will have some outstanding “The New World Mine—The Interface of and Women in the Geosciences, low-cost resources available for use in the Science and Policy Outside Yellowstone Association for Women Geoscientists, classroom. Hope to see you in Denver! ■ National Park.” IEE continued on p. 11

10 GSA TODAY, September 1996 GSAF UPDATE

Robert L. Fuchs GSA Foundation, 3300 Penrose Place, The Book Nook—for Retirement P.O. Box 9140, Boulder, CO 80301 (303) 447-2020, [email protected] and Estate Planning Enclosed is my contribution in the amount of $______for: The Foundation has a library of booklets and pamphlets on Foundation Unrestricted GSA Unrestricted retirement and estate planning. The reading is easy, so if you are The ______program or fund. thinking of your future retirement, arranging your estate, worry- My pledge to the Second Century Fund is $______per year ing about taxes, or just wondering if you ought to be doing these for ___ years. things, this information may be just what you need to start or Send me the list of what’s in the Book Nook. modify a plan for you and your family. I’d like the 1996 Tax/Planning Guides. Some of the titles include Ideas for Retirement, Trusts for Send me a set of the booklets. Tomorrow, Rewards of Financial Planning, Trusts for Family and Soci- ety, Golden Opportunities, and Planning for Real Estate Owners. Send PLEASE PRINT for a complete list from which to choose, or better yet, just check Name ______this month’s Foundation coupon and we’ll send you the entire Address ______collection (free of charge, of course). Two other items that you may find helpful in regard to this City/State/ZIP ______year’s finances are the 1996 Personal Planning Guide and Federal Phone ______Tax Guide. Again, we’ll be happy to send these on request. ■ Donors to the Foundation, June 1996 News of the Second Century Fund Birdsall Award Rip Rapp Half Zantop Membership Campaign Robert W. Ritzi Archaeological E-an Zen* Geology Award Gretchen Louise Shlemon Fund Reminder: GeoHostel Drawing George R. Rapp, Jr.* • —A drawing for a GeoHostel Blechschmidt Fund James Edward Slosson* will be held at the GSA Annual Meeting in Denver (October Donald W. Tubbs Second Century Fund Unrestricted— 27–31). The second and third prizes will be announced later. Thomas J. Algeo History of Geology Foundation Katharine Lee Avary Eligible participants are all those who have pledged at least $50 a Award William P. Brosge* Sue Beggs Robert N. Ginsburg* Robert A. Cadigan year for five years, or made a one-time contribution of at least Randolph W. Bromery* James W. Collinson $250, to the membership campaign. Make sure to get your quali- Maria Luisa Crawford* Institute for Louis C. Conant* Charles S. Denny fying Second Century Fund pledge in soon! Environmental Paul E. Damon Robert Edward • North-Central Section Names SCF Coordinators—Lee J. Education Charles S. Denny Folinsbee* Bruce R. Clark H. Stanton Hill Suttner, chair of the North-Central Section Second Century Fund Freeport-McMoRan, Victor John E. Dean B. Laudeman membership campaign, has organized a team of SCF coordinators Inc.* Yannacone, Jr. Andrew W. Lee Samuel F. Huffman to facilitate fund-raising campaigns in each of their respective John C. Ludlum Memorial Fund A. David Kendrick geographic areas. We thank these individuals (listed here) for Scott L. Neville Elizabeth T. Simpson* David L. Meyer Jack E. Oliver* helping the Foundation with this important task. (in memory of Eldridge M. Moores* Charles H. Shultz Howard E. Simpson) North-Central Section* Richard Anderson Arthur Mirsky Ronald K. Sorem John C. Palmquist Minority Fund Kathleen M. White Wayne I. Anderson John C. Palmquist Edward F. Stoddard Michele L. Aldrich* David J. Zbieszkouski, Jr. Kennard B. Bork Allan F. Schneider A. Wesley Ward, Jr. Unocal Corporation/ Richard A. Davis Bruce M. Simonson Union Oil Company Unrestricted—GSA Richard D. Harvey William T. Straw Research Grants of California* Merwin Bernstein Vance T. Holliday Charles H. Summerson Irving S. Fisher Fred Webb, Jr. James A. Dutcher Harold H. Stowell Peter J. Hudleston Lawrence D. Taylor Robert A. Weeks William C. Graustein James Knox John E. Utgaard ■ Carl Pius Weibel Paul R. Shaffer *Century Plus Roster— Charles E. Wier* David L. Meyer gifts of $150 or more

IEE continued from p. 10 • Global Impacts of Mining and Urbaniza- Remediation of Non–Aqueous-phase tion on Fluvial and Coastal Systems. Liquids at Hazardous Waste Sites. and National Association for Black Geol- (Monday a.m.) (Wednesday p.m.) ogists and Geophysicists; Tuesday a.m.) • Clean-up at Rocky Flats, a Former • Integrated Site Characterization for Nuclear Weapons Plant: Application of Waste Disposal. (Thursday p.m.) Theme Sessions Science to Site Remediation Plans. These and other environmental • Neogene and Quaternary Geology of the (Tuesday p.m.) geoscience sessions at the GSA annual Yucca Mountain Region, Nevada, and Its • Rates of Geologic Processes in the meeting demonstrate the growing demand Relevance to Long-Term Nuclear Waste Holocene. (Wednesday a.m. and p.m.) for high-quality geoscientific knowledge Isolation. (Monday p.m.; Tuesday a.m.) • Linking Natural and Social Systems in in the environmental arena, the impor- • Environmental Geology: The Voice of Geoscience Education: Pedagogy, tance of interdisciplinary approaches to Reason. (Cosponsored by the National Content, and Context. (Cosponsored by environmental problem-solving, and the Association of Geoscience Teachers.) the National Association of Geoscience urgent need to understand and communi- (Tuesday p.m.) Teachers.) (Wednesday p.m.) cate the value of geoscience within a • The Impact of Geologic Heterogeneities broad societal context. ■ on Characterization, Transport, and

GSA TODAY, September 1996 11 Annual Meeting Sponsors Annual Meeting Co-Sponsors The following companies have generously donated funds or services to support the Denver Annual Meeting. GSA Colorado Scientific Society appreciates this support and thanks these companies. The Colorado Scientific Society was founded in Denver, Colorado, Cameca Instruments • EARTH Magazine on December 8, 1882, six years after Col- orado became a state. Founder S. F. Earth’n Ware Inc. • MicroMass Emmons of the U.S. Geological Survey, Premier Copier Products • Salt Lake City who later was also a founder and presi- Brewing Company • W. H. Freeman and dent (1903) of the Geological Society of America, and 11 colleagues were inter- Company • Wadsworth Publishing/ITP ested in an exchange of observations and West Publishing Company • Worth Publishers ideas on topics in earth science. The mem- Current President: bership has grown from these original 12 to Rich Madole, USGS, about 375. Current members include repre- Denver, Colorado sentatives from many earth-science organizations including Notice of Council Meeting federal and state government agencies, colleges, universities, Meetings of the GSA Council are open to Fellows, and private industry. The objectives of the Society are to pro- Members, and Associates of the Society, who may attend mote knowledge, the understanding of science, and the appli- as observers, except during executive sessions. Only cation of science to human needs. councilors, officers, and section representatives may speak to agenda items, except by invitation of the chair. Rocky Mountain Association Because of space and seating limitations, notification of of Geologists attendance must be received by the Executive Director prior to the meeting. The next meeting of the Council will The Rocky Mountain be Tuesday afternoon, October 29, 1996, at the Annual Association of Geologists is a nonprofit Meeting in Denver. organization whose purposes are to pro- mote interest in geology and allied sci- ences and their practical application, to foster scientific research, and to encourage fellowship and cooperation among its VisitVisit thethe members. The Rocky Mountain Association of Geologists is one of the largest associa- Current President: tions of geologists in the United States. Edward D. Dolly, GSAGSA BookstoreBookstore Anschutz Explo- RMAG is composed of earth scientists from ration Corporation 1996 ANNUALNNUAL MEETINGEETING DENVERENVER industry, government, and academia 1996 A M D encompassing a wide spectrum of backgrounds. All share a common interest in the geology of the Rocky Mountain area. Founded in 1922, RMAG is one of the most active AAPG affili- ates in the country.

Society for Sedimentary Geology (SEPM)-Rocky Mountain Section The Rocky Mountain NEWNEW HOURS!HOURS! Section (RMS) was organized in the early EXCLUSIVE SHOPPING 1970s to promote all aspects of sedimen- tary geology in the Rocky Mountain region. OPPORTUNITY! The RMS holds luncheon meetings in We have extended our bookstore hours* through Thurs- Denver, on the fourth Tuesday of the month from September to May. The group pub- day (9:00 a.m. to 3:00 p.m.) — a full day after all other lishes books about the sedimentary geology exhibits close. All show discounts and specials will be in of the Rocky Mountain region and conducts effect through close on Thursday. field trips and short courses in conjunction Current President: with regional and national AAPG and SEPM John W. Robinson, meetings. Its most recent publication, Snyder Oil SHOP AT THE BOOKSTORE Corporation “Paleozoic Systems of the Rocky Mountain STOP BY FOR A SPECIAL TREAT! Region,” will be available at the GSA Annual Meeting. Its fall *GSA service booths, Membership, Foundation, 1996 field trip will examine Paleozoic and Mesozoic deposi- SAGE and PEP will also be open Thursday. tional systems in southern Wyoming and northern Utah.

12 GSA TODAY, September 1996 1996 GSA Annual Meeting Denver, Colorado • October 28-31 Late Colorado Convention Center • Marriott City Center—Headquarters Hotel Breaking The theme for the 1996 Denver meeting is Earth System Summit. The Earth is a complete News system whose processes are complexly interrelated at a variety of scales. We are all inhabitants of this amazing system, and our actions can significantly impact, or be impacted by, its dynamic behav- ior. The gathering of scientists and engineers for the GSA Annual Meeting in Denver, at the base of the Rocky Mountains, will be an intellectual summit, focusing on the Earth System. Read through the extensive list of symposia and theme sessions. Topics range from the global scale to focus on the southern Rocky Mountains; something to interest everyone. Our keynote symposium, convened by E-an Zen and Karen Prestegaard, considers Linkages Among Dynamic Processes of Oceans, Continents, and Atmosphere on a global scale. The Annual Meeting Committee has also recruited symposia on the geologic development of the southern Rocky Mountains, ecosystems and the role of science in their management, and Earth system processes at the last glacial maximum. We invite you all to come, listen, and participate. Every geologist knows Denver, founded on mining and still known as the Queen City of the Plains. Colorado is booming, and Denver, its capital, is more than keeping pace. The meeting will be at a new convention center in a revitalized, completely rejuvenated downtown. Lower downtown Denver (Lodo) is an exciting dining and entertainment area, with restaurants, brew pubs, and clubs. It’s only a few miles west to the foot of the Rockies. There will be opportunities to get out and to enjoy the scenery. Come to Denver this autumn to stimulate your mind, to see your colleagues, and to enjoy Colorado. —1996 General Co-Chairs: Gregory S. Holden and Kenneth E. Kolm

Registration and housing information June issue of GSA Today Preregistration deadline September 20 Housing deadline September 30 For information 1-800-472-1988, ext.133; fax 1-303-447-0648 1996 Annual Meeting Committee: (From left to right) Front Row: Lisa Finiol, E-mail: [email protected] Ken Kolm, Chuck Pillmore, Kata McCarville. Middle Row: Kris Zumalt, Greg WWW:http://www.geosociety.org Holden, Doug Peters. Back Row: John Warme, John Humphrey, Ren Thompson. Not pictured: Dwaine Edington, Jeanne Fuchs, Linda Martin.

S4. Earth System Processes at the Last Glacial Maximum. 1996 GSA Annual Meeting Overview of the Committee. Oct. 30, a.m. S5. Dimensional Scaling and the Stratigraphic Record of Episodic and Periodic Forcing. 1996 GSA Annual Meeting Program Sedimentary Geology Division. Oct. 29, p.m. S6. Interdisciplinary Strategies for Teaching about There will be 202 technical ses- the Earth as a System. Geoscience Education Symposia Division. Oct. 28, p.m. sions presented during the course S7. Coalbed Methane—From Micropore to Pipeline. of the meeting. Of these, symposia S1. GSA Keynote Symposium: Linkages Among Coal Geology Division. Oct. 28, a.m. (invited papers) and theme sessions Dynamic Processes of Oceans, Continents, S8. The Geoarchaeology of Caves and Cave (volunteered papers submitted to and Atmosphere. 1996 GSA Annual Meeting Sediments. Archaeological Geology Division. Committee. Oct. 28, a.m. Oct. 29, p.m. a specific topic) are referred to by S2. Tectonic Development of the Southern S9. Annual Environmental Forum: Prospects for a number that precedes the title. Rocky Mountains. 1996 GSA Annual Meeting the Future: Gold and Water in the Earth All other sessions are referred to by Committee. Oct. 30, a.m. System. IEE. Oct. 27, p.m. S3. Dinosaurs, Asteroids, Spotted Owls, and S10. Earth Systems Education: KÐ16. NESTA. disciplines, such as Geochemistry I, II. Humanity: An Evolving View of Ecosystems Oct. 28, a.m. Sessions are oral unless poster is and the Role of Science in Their Manage- S11. Recent Advances in Plate Tectonics—What indicated. ment. 1996 GSA Annual Meeting Committee Students Should Know. NAGT. Oct. 29, p.m. and IEE. Oct. 28, p.m.

GSA TODAY, September 1996 13 S27. The Role of Preferential Flow in the T24. Mapping Other Worlds. Planetary Geology Key to Organizations Unsaturated Zone. Hydrogeology Division. Division. Oct. 28, p.m. (POSTERS). Sponsoring Sessions Oct. 31, a.m. T25. Jupiter: Solar System Exploration Continues. S28. Biology of the Foraminiferida: Applications Planetary Geology Division. Oct. 28, a.m. CF Cushman Foundation in Paleoceanography, Paleobiology, and the T26. Application of Reactive Transport Modeling to GIS Geoscience Information Environmental Sciences. CF. Oct. 28, a.m. Natural Systems. MSA. Oct. 28, p.m. Society S29. Evolutionary Paleoecology. PS. Oct. 29, a.m. T27. Mineralogy of Planetary Surfaces Using In- S30. Impact of the Western Surveys. History of Situ Analysis and Remote Sensing. MSA and GS Geochemical Society Geology Division. Oct. 29, p.m. Planetary Division. Oct. 30, a.m. (ORAL)/ IEE Institute for Environmental S31. Applications of Reactive Transport Modeling to p.m. (POSTERS). Education Natural Systems. MSA. Oct. 28, a.m. T28. Environmental Mineralogy. MSA and Clay MSA Mineralogical Society of Minerals Society. Oct. 31, a.m./p.m. America T29. Hydrogeology of Confining Units I: Sampling, NABGG National Association for Analysis, and Interpretation. Hydrogeology Theme Sessions Division and Society for Sedimentary Geology. Black Geologists and T1. The U.S. Atlantic Passive Margin: Tectonics, Oct. 27, p.m. Geophysists Eustasy, and Sedimentation—A Memorial to T30. Hydrogeology of Confining Units II: Physical NAGT National Association of James Patrick Owens. Sedimentary Geology and Biogeochemical Processes. Hydrogeol- Division. Oct. 28, a.m. (ORAL)/p.m. Geoscience Teachers ogy Division and Society for Sedimentary (POSTERS). Geology. Oct. 28, a.m. NESTA National Earth Science T2. History of the Equatorial Atlantic. Oct. 28, p.m. T31. Field-Scale Investigations of Biodegradation. Teachers Association (POSTERS). Hydrogeology Division. Oct. 28, p.m. PS Paleontological Society T3. High-Resolution Glacial Records from Marine T32. Scale Effects of Fluid Flow and Fractures. SEG Society of Economic and Lacustrine Basins. Quaternary Geology Oct. 28, a.m./p.m. and Geomorphology Division. Oct. 31, p.m. Geologists T33. Geofluids: The Role of Fluids in Crustal SGE Sigma Gamma Epsilon T4. Application of Soil-Based Information for Processes. Oct. 30, a.m. (ORAL)/ Understanding Earth Surface Processes. p.m. (POSTERS). Quaternary Geology and Geomorphology Division. Oct. 29, p.m. T34. Applications of Isotopes for Understanding S12. Geochemical Constraints on Seawater Hydrologic Systems. Hydrogeology Division. Composition and the Coupled Ocean- T5. Cretaceous of the Western Interior Seaway, Oct. 28, p.m./Oct. 29, a.m. North America. Oct. 28, a.m./p.m. Atmosphere System: The Precambrian T35. High Plains Hydrogeology. Hydrogeology Revisited. GS. Oct. 29, p.m. T6. The Rockies Across the Southern Border. Division. Oct. 28, a.m. Oct. 29, a.m. S13. Organic Geochemistry—Linking the T36. Physical and Chemical Heterogeneity: Biosphere and Geosphere. GS—Organic T7. Paleozoic and Mesozoic Tectonic History of Impact on Reactive Transport. Hydrogeology Geochemistry Division. Oct. 27, a.m./p.m. Central Asia. Oct. 28, a.m. Division. Oct. 30, a.m. S14. Engineering Geology Applications of Geologic T10. Appalachian and Cordilleran Melanges: T37. Innovations and Applications of Inverse Maps. Engineering Geology Division. Oct. 30 Comparisons and Contrasts. Northeastern, Ground-water Models. Hydrogeology Division. a.m. Southeastern, Cordilleran Sections of GSA. Oct. 30, p.m. Oct. 31, p.m. S15. Farvolden Hydrogeology Symposium. T38. Evaporite Karst: Origins, Processes, Hydrogeology Division. Oct. 29, a.m. T11. Laramide Sedimentation and Tectonics in the Landforms, Examples, and Impacts. S16. Perspectives on Soil-Based Information Rocky Mountains. Oct. 30, p.m. Hydrogeology Division and Engineering for Investigating Earth Surface Processes. T12. History of Recurrent Basement Faulting in Geology Division. Oct. 30, p.m. Quaternary Geology and Geomorphology Cratonic North America and Its Orogenic Mar- T39. The Death Valley Hydrogeologic System. Division. Oct. 29, a.m. gins. Oct. 31, a.m. (ORAL)/p.m. (POSTERS). Oct. 31, a.m. S17. Planets as Complex Systems. Planetary T13. Geologic and Hydrologic Studies of Fluid Flow T40. Physical and Chemical Heterogeneity: Impact Geology Division. Oct. 29, a.m. in Faults. Oct. 29, p.m. on Samples and Measurements at Wells. S18. Expanding Boundaries: Geoscience T14. Evolution of the Neogene Strain Field in the Hydrogeology Division. Oct. 31, a.m. Information for Earth System Science. GIS. Southeastern Great Basin: Roles of Faults, T41. Diagenetic Processes at Waste-Disposal Oct. 29, a.m. Folds, and Magmatism. Oct. 31, a.m. Sites. Hydrogeology Division. Oct. 29, p.m. (ORAL)/p.m. (POSTERS). S19. Seismic Investigations Along the Western T42. Global Impacts of Mining and Urbanization on Margin and Cordillera of North America: T15. Neogene and Quaternary Geology of the Fluvial and Coastal Systems. Oct. 28, a.m./ Tectonic Implications. Geophysics Division. Yucca Mountain Region, Nevada, and Its Rel- Oct. 29, a.m. Oct. 29, p.m. evance to Long-term Nuclear Waste Isolation. IEE. Oct. 28, p.m./Oct. 29, a.m. T43. Environmental Geology: The Voice of Reason. S20. Active Tectonics of Intracontinental Mountain IEE. Oct. 29, p.m. Belts with Implications for Ancient Systems. T16. Seismic Investigations Along the Western T44. Clean-up at Rocky Flats, a Former Nuclear Structural Geology and Tectonics Division. Margin and Cordillera of North America: Weapons Plant: Application of Science to Site Oct. 28, p.m. Data and Earth Models. Geophysics Division. Remediation Plans. IEE. Oct. 29, a.m. S21. SGE Student Research. Oct. 29, p.m. Oct. 29, a.m. (POSTERS) T45. Integrated Site Characterization for Waste (POSTERS). T17. Cenozoic Uplift of the Western United States. Disposal. IEE. Oct. 31, p.m. S22. Alteration Geochemistry: Genetic and Geophysics Division. Oct. 31, p.m. T46. Interpretation of Continental Sedimentation Exploration Perspectives. SEG. Oct. 27 T18. Precambrian Lithosphere I: Proterozoic Patterns Using Surface and Subsurface Data. a.m./p.m. Tectonics—Modification of Archean Cratons Oct. 31, p.m. S23. Geoscience Information for Tomorrow’s and Additions of Juvenile Crust. Oct. 30, a.m. T47. The Impact of Geologic Heterogeneities on Markets: What Is Wrong with the Present (ORAL)/Oct. 31, p.m. (POSTERS). Characterization, Transport, and Remediation Products. IEE, GSA International Division, T19. Precambrian Lithosphere II: Mid-Proterozoic of NonÐAqueous Phase Liquids (NAPLs) at and IUGS Commission on the Management Magmatism and Tectonics of Western North Hazardous Waste Sites. Oct. 30, p.m. and Application of Geoscience Information America. Oct. 30, p.m. (COGEOINFO). Oct. 30, p.m. T20. Precambrian Lithosphere III: Middle Crustal T48. Rates of Geologic Processes in the Holocene. IEE. Oct. 30, p.m. S24. Tectonic Evolution of the Urals and Surround- Processes. Oct. 31, a.m. ing Basins. International Division. Oct. 29, a.m. T21. Volcanism, Tectonism, and Sedimentation T51. Mechanics of the Riverbed: Hydrology, Sedi- mentology, and Geomorphic Consequences. S25. Earth ScienceÐEnvironmental Justice Summit. in the Rio Grande Rift and Its Margins in (Combined with T49 and T50.) Oct. 29, p.m. GSA Committee on Public Policy, IEE, GSA New Mexico and Colorado. Oct. 30, p.m. Committee on Minorities and Women in the (POSTERS)/Oct. 31, p.m. (ORAL). T52. Geographic Information Systems and Geosciences, NABGG. Oct. 29, a.m. T22. Magma Generation and Evolution at Integrated Digital Databases: Tools for Geoscience Analysis. (Combined with T53.) S26. Environmental Mineralogy: Science and Convergent Margins. Oct. 30, p.m. Oct. 29, p.m. (POSTERS)/ Politics. MSA, Clay Minerals Society. T23. High and Ultrahigh Strain Rate Processes in Oct. 31, a.m./p.m. (ORAL). Oct. 30, p.m. the Earth and Planetary Sciences. Oct. 30, p.m.

14 GSA TODAY, September 1996 T54. Improving Geoscience Courses Through the Use of the Internet and the World Wide Web. FREE NAGT. Oct. 30, a.m./p.m. and Prior to Publication … T55. Roles of Multiple Intelligences and Creativity in Teaching, Learning, and Doing Geoscience. Create your own personal schedule for the meeting … (Combined with T56.) Oct. 28, p.m. T57. National Parks as Classrooms for Geoscience GSA Technical Sessions on the Web Education. NAGT. Oct. 28, a.m./p.m. The titles and authors database is available on the Web. You can download sessions, T58. The Role of Geology Field Camp in the events, exhibits, field trips, and courses together with a basic search and sorting soft- Geology Curriculum: An Appraisal. Oct. 29, ware that will create your personal daily calendar. Internet: http://www.geosociety.org. a.m./p.m. T59. Geology Field Camp Exercises in the Rocky Mountains. Oct. 30, a.m. (POSTERS) T60. Linking Natural and Social Systems in Session 8, 8:00 AM, CCC:C109 Session 28, 8:00 AM, CCC:C207 Geoscience Education: Pedagogy, Content, Aqueous Geochemistry IÐOrganic and T35. Hydrogeology Division: High Plains and Context. NAGT and IEE. Oct. 30, a.m. Biogeochemistry Hydrogeology (ORAL)/p.m. (POSTERS). Session 9, 8:00 AM, CCC:Posters Hall B1 Session 29, 8:00 AM, CCC:C102-104-106 T61. Organics-Ore Interactions in the Field and Aqueous Geochemistry Posters T42. Global Impacts of Mining and Urbaniza- Laboratory. SEG and IGCP, Project #357. Session 10, 8:00 AM, CCC:Posters Hall B1 tion on Fluvial and Coastal Systems—Part I Oct. 28, a.m. Carbonate Sediments and Diagenesis Session 30, 8:00 AM, CCC:C105-107 T62. The Magmatic-Hydrothermal-Epithermal Posters T57. NAGT: National Parks as Classrooms for Transition and Associated Alteration and Session 11, 8:00 AM, CCC:C209 Geoscience Education—Part I Mineralization. SEG. Oct. 30, a.m./p.m. CF Symposium (S28): Biology of the Session 31, 8:00 AM, CCC:A207-209 T63. Quantifying the Environmental Impacts of Foraminiferida: Applications in Paleo- T61. SEG and IGCP, Project #357: Organics- Mining. SEG. Oct. 31, a.m./p.m. ceanography, Paleobiology, and the Ore Interactions in the Field and Laboratory The missing theme numbers received too few Environmental Sciences abstracts. The minimum number to be submitted Session 12, 8:00 AM, CCC:A111 Monday, October 28, PM was 16. In general, the abstracts submitted to these Coal Geology Division Symposium (S7): Session 32, 1:30 PM, CCC:C108-110-112 themes have been combined with other themes as Coalbed Methane—From Micropore to 1996 GSA Annual Meeting Committee and noted or absorbed into discipline sessions. Pipeline IEE Symposium (S3): Dinosaurs, Asteroids, Session 13, 8:00 AM, CCC:Posters Hall B1 Spotted Owls, and Humanity: An Evolving Experimental Petrology (Posters) View of Ecosystems and the Role of Science Session 14, 8:00 AM, CCC:A108 in Their Management Session Program Marine Geology Session 33, 1:30 PM, CCC:Posters Hall B1 Session 15, 8:00 AM, CCC:Posters Hall B1 Archaeological Geology Posters Calendar Metamorphic Petrology Posters Titles and Authors Database: Session 16, 8:00 AM, CCC:Posters Hall B1 http://www.geosociety.org Mineralogy/Crystallography Posters Session 17, 8:00 AM, CCC:A101-103 Media Workshop To Sunday, October 27, AM MSA Symposium (S31): Applications of Reac- Illustrate Effective Session 1, 8:00 AM, CCC:A101-103 tive Transport Modeling to Natural Systems Organic Geochemistry Division of the GS Session 18, 8:00 AM, CCC:C101-103 Communication Symposium (S13): Organic Geochemistry— NESTA Symposium (S10): Earth Systems Linking the Biosphere and Geosphere—Part I Education: KÐ16 The need for geoscientists to Session 2, 8:00 AM, CCC:A105-107 Session 19, 8:00 AM, CCC:A202-204 communicate effectively with deci- SEG Symposium (S22): Alteration Paleontology/Paleobotany I—Turning Points sion-makers and the public has never Geochemistry: Genetic and Exploration in Life History been greater. Because the news media Perspectives—Part I Session 20, 8:00 AM, CCC:Posters Hall B1 are the most important vehicle for Quaternary Geology Posters I—Glacial and reaching a broad, nontechnical audi- Sunday, October 27, PM Neotectonics ence, GSA is offering a hands-on work- Session 3, 1:30 PM, CCC:A207-209 Session 21, 8:00 AM, CCC:C201-205 shop that can teach you how to get IEE Symposium (S9): IEE Annual Environ- Tectonics I—Southern Hemisphere and your message heard. If you have mental Forum: Prospects for the Future: Precambrian Tectonics limited experience dealing with the Gold and Water in the Earth System Session 22, 8:00 AM, CCC:A102-104-106 media, if you’ve had negative experi- Session 4, 1:30 PM, CCC:A101-103 T01. Sedimentary Geology Division: The U.S. ences in past media interviews, or Organic Geochemistry Division of the GS Atlantic Passive Margin: Tectonics, Eustasy, even if you’re comfortable speaking and Sedimentation—A Memorial to James Symposium (S13): Organic Geochemistry— to reporters but would like some addi- Linking the Biosphere and Geosphere— Patrick Owens—Part I tional pointers, this workshop will help Part II Session 23, 8:00 AM, CCC:A205 prepare you for future encounters with Session 5, 1:30 PM, CCC:A105-107 T05. Cretaceous of the Western Interior SEG Symposium (S22): Alteration Geochem- Seaway, North America—Part I. the press, radio, and television. istry: Genetic and Exploration Perspectives— Session 24, 8:00 AM, CCC:A105-107 The GSA Media Workshop will Part II T07. Paleozoic and Mesozoic Tectonic be held on Sunday, October 27, from Session 6, 1:30 PM, CCC:A102-104-106 History of Central Asia 8:30 a.m. to noon. This event is offered T29. Hydrogeology Division and Society for Session 25, 8:00 AM, CCC:C108-110-112 as a public service at no cost to atten- Sedimentary Geology: Hydrogeology of T25. Planetary Geology Division: Jupiter: dees of the GSA 1996 Annual Meeting Confining Units I: Sampling, Analysis, and Solar System Exploration Continues in Denver. Workshop attendance is Interpretation Session 26, 8:00 AM, CCC:A201 limited, however, so if you would like T30. Hydrogeology Division and Society for to participate, please contact: Sandra Monday, October 28, AM Sedimentary Geology: Hydrogeology of Con- Rush, GSA Public Information Consul- Session 7, 8:00 AM, CCC:Ballroom 2&3 fining Units II: Physical and Biogeochemical tant, Geological Society of America, 1996 GSA Annual Meeting Committee (S1): Processes P.O. Box 9140, Boulder, CO 80301, (303) GSA Keynote Symposium: Linkages Among Session 27, 10:00 AM, CCC:A108 494-1576, E-mail: [email protected]. Dynamic Processes of Oceans, Continents, T32. Scale Effects of Fluid Flow and and Atmosphere Fractures—Part I

GSA TODAY, September 1996 E-mail: [email protected] 15 Session 34, 1:30 PM, CCC:C109 Session 58, 8:00 AM, CCC:Posters Hall B1 Session 77, 8:00 AM, CCC:C207 Clastic Sediments I—Sedimentary Petrology Economic Geology Posters T34. Hydrogeology Division: Applications of Session 35, 1:30 PM, CCC:A102-104-106 Session 59, 8:00 AM, CCC:C109 Isotopes for Understanding Hydrologic Economic Geology I—Magmatic and Engineering Geology Systems—Part II Epithermal Deposits Session 60, 8:00 AM, CCC:C209 Session 77.5, 10:00 AM, CCC:A111 Session 36, 1:30 PM, CCC:Posters Hall B1 Experimental Petrology T42. Global Impacts of Mining and Urbaniza- tion on Fluvial and Coastal Systems—Part II Environmental Geology Posters Session 61, 8:00 AM, CCC:A105-107 Session 37, 1:30 PM, CCC:C101-103 Geochemistry I—High Temperature and Session 78, 8:00 AM, CCC:A111 Geoscience Education Division Symposium Hydrothermal Geochemistry T44. IEE: Clean-up at Rocky Flats, a Former Nuclear Weapons Plant: Application of (S6): Interdisciplinary Strategies for Teaching Session 62, 8:00 AM, CCC:C105-107 Science to Site Remediation Plans about the Earth as a System Geology Education I Session 79, 8:00 AM, CCC:A101-103 Session 38, 1:30 PM, CCC:A202-204 Session 63, 8:00 AM, CCC:A202-204 T58. The Role of Geology Field Camp in the Mineralogy/Crystallography GIS Symposium (S18): Expanding Bound- Geology Curriculum: An Appraisal—Part I Session 39, 1:30 PM, CCC:C207 aries: Geoscience Information for Earth Paleontology/Paleobotany II—Terrestial System Science Ecosystems and Quantitative Methods Session 64, 8:00 AM, CCC:A205 Tuesday, October 29, PM Session 40, 1:30 PM, CCC:A105-107 GSA Committee on Public Policy, IEE, GSA Session 80, 1:30 PM, CCC:A105-107 Planetary Geology Committee on Minorities and Women in the Archaeological Geology Division Symposium (S8): The Geoarcheology of Caves and Cave Session 41, 1:30 PM, CCC:A207-209 Geosciences, NABGG Symposium (S25): Sediments Quaternary Geology/Geomorphology I— Earth ScienceÐEnvironmental Justice Summit Process Geomorphology Session 65, 8:00 AM, CCC:A108 Session 81, 3:30 PM, CCC:A108 Coal Geology Session 42, 1:30 PM, CCC:C201-205 History of Geology Structual Geology and Tectonics Symposium Session 66, 8:00 AM, CCC:C102-104-106 Session 82, 1:30 PM, CCC:C102-104-106 (S20): Active Tectonics of Intracontinental Hydrogeology Division Symposium (S15): Economic Geology II Mountain Belts with Implications for Ancient Farvolden Hydrogeology Symposium Session 83, 1:30 PM, CCC:Posters Hall B1 Systems Session 67, 8:00 AM, CCC:C101-103 Geochemistry Posters Session 43, 1:30 PM, CCC:C102-104-106 International Division Symposium (S24): Session 84, 1:30 PM, CCC:C101-103 Tectonics II—Cordilleran Tectonics 1 Tectonic Evolution of the Urals and Geophysics Division Symposium (S19): Session 44, 1:30 PM, CCC:Posters Hall B1 Surrounding Basins Seismic Investigations Along the Western T01. Sedimentary Geology Division: The U.S. Session 68, 8:00 AM, CCC:Posters Hall B1 Margin and Cordillera of North America: Atlantic Passive Margin: Tectonics, Eustasy, Micropaleontology Posters Tectonic Implications and Sedimentation—A Memorial to James Session 69, 8:00 AM, CCC:Ballroom 2&3 Session 85, 1:30 PM, CCC:Posters Hall B1 Patrick Owens—Part II (Posters) Planetary Geology Division Symposium Geoscience Information Posters Session 45, 1:30 PM, CCC:Posters Hall B1 (S17): Planets as Complex Systems Session 86, 1:30 PM, CCC:A201 T02. History of the Equatorial Atlantic (Posters) Session 70, 8:00 AM, CCC:C201-205 GS Symposium (S12): Geochemical Session 46, 1:30 PM, CCC:A205 PS Symposium (S29): Evolutionary Constraints on Seawater Composition and T05. Cretaceous of the Western Interior Paleoecology the Coupled Ocean-Atmosphere System: The Precambrian Revisited Seaway, North America—Part II Session 71, 8:00 AM, CCC:A102-104-106 Session 47, 3:30 PM, CCC:A105-107 Quaternary Geology and Geomorphology Session 87, 1:30 PM, CCC:C105-107 T15. IEE: Neogene and Quaternary Geology Division Symposium (S16): Perspectives History of Geology Division Symposium of the Yucca Mountain Region, Nevada, and on Soil-Based Information for Investigating (S30): Impact of the Western Surveys its Relevance to Long-Term Nuclear Waste Earth Surface Processes Session 88, 1:30 PM, CCC:Posters Hall B1 Isolation—Part I Session 72, 8:00 AM, CCC:Posters Hall B1 History of Geology Posters Session 48, 1:30 PM, CCC:Posters Hall B1 Stratigraphy Posters—Impact Megabeds Session 89, 1:30 PM, CCC:Ballroom 2 & 3 T24. Planetary Geology Division: Mapping Session 73, 8:00 AM, CCC:C108-110-112 NAGT Symposium (S11): Recent Advances Other Worlds. (Posters) Structural Geology I—Faulting in Plate Tectonics—What Students Should Know Session 49, 1:30 PM, CCC:A101-103 Session 74, 10:00 AM, CCC:C109 T26. MSA: Application of Reactive Transport T06. The Rockies Across the Southern Border Session 90, 1:30 PM, CCC:A111 Modeling to Natural Systems Paleoceanography/Paleoclimatology I— Session 75, 8:00 AM, CCC:A207-209 Cenozoic to Paleozoic Climates and Oceans Session 50, 1:30 PM, CCC:A201 T15. IEE: Neogene and Quaternary Geology T31. Hydrogeology Division: Field-Scale of the Yucca Mountain Region, Nevada, and Session 91, 1:30 PM, CCC:Posters Hall B1 Investigations of Biodegradation its Relevance to Long-Term Nuclear Waste Planetary Geology Posters Session 51, 1:30 PM, CCC:A111 Isolation—Part II Session 92, 1:30 PM, CCC:C109 T32. Scale Effects of Fluid Flow and Session 76, 8:00 AM, CCC:Posters Hall B1 Precambrian Geology Fractures—Part II T16. Geophyics Division: Seismic Investigations Session 93, 1:30 PM, CCC:A207-209 Session 52, 1:30 PM, CCC:C209 Along the Western Margin and Cordillera of North Quaternary Geology/Geomorphology II— T34. Hydrogeology Division: Applications America: Data and Earth Models. (Posters) Late Quaternary Climates: Western U.S. of Isotopes for Understanding Hydrologic and Eastern Pacific Oceans Systems—Part I Session 53, 1:30 PM, CCC:A108 T55. Creative Links between Geoscience and Learners Designing Geology Classes on the Xerox LiveBoard Session 54, 1:30 PM, CCC:C105-107 Sunday, October 27, 8:30 to 11:30 a.m.; Colorado Convention Center, A204. T57. NAGT: National Parks as Classrooms for Sponsored by Xerox Corporation. Geoscience Education—Part II This workshop will demonstrate how to use the world’s easiest authoring system Tuesday, October 29, AM to design introductory geology courses using graphics, video, sound, and text on a Session 55, 8:00 AM, CCC::A201 Xerox LiveBoard. This 67"-screen-computer uses infrared pen and shared surface Aqueous Geochemistry II—Experimental and technology for interactive on-site and remote presentation. Learn how to make Theoretical Geochemistry dinosaurs roar, plates move before your eyes, and field camps come alive while you Session 56, 10:00 AM, CCC:A108 are still writing on the electronic chalkboard. Archaeological Geology Limit: 45. No fee. For information: Hilde Schwartz or Joyce R. Blueford, Math/ Sci- Session 57, 8:00 AM, CCC:Posters Hall B1 ence Nucleus, 4009 Pestana Place, Fremont, CA 94538-6301, (510) 490-6284. Coal Geology Posters

16 GSA TODAY, September 1996 1996 Technical Program Summary by Scientific Discipline KEY: I, II, III, … X = Discipline session number in a series; P = Poster; S = Symposium; T = Theme Session (listed under disciplines having the majority of the abstracts). SUN, OCT. 27 MON, OCT. 28 TUES, OCT. 29 WED, OCT. 30 THURS, OCT. 31 8:00 a.m.Ð12:00 N 8:00 a.m.Ð12:00 N 8:00 a.m.Ð12:00 N 8:00 a.m.Ð12:00 N 8:00 a.m.Ð12:00 N DISCIPLINE 1:30Ð5:30 p.m. 1:30Ð5:30 p.m. 1:30Ð5:30 p.m. 1:30Ð5:30 p.m. 1:30Ð5:30 p.m. AM PM AM PM AM PM AM PM AM PM ANNUAL MEETING–VARIOUS S1 S2, S4 ARCHAEOLOGY P I S8 COAL S7 P I COMPUTERS TP52 T52 T52 ECONOMIC S22 S22 T61 I P II T62 T62 T63 T63,III S6, T55, S11, SP21, T54, TP59, T54, TP60, EDUCATION S10, T57 T57 T58, I T58 T60 P II III ENGINEERING I S14 T38 P ENVIRONMENTAL T42 P T42, T44 T43 T47 I T45, T46 GEOCHEMISTRY, AQUEOUS I, P II S12 T33 TP33 III GEOCHEMISTRY, OTHER S13 S13 I P II GEOPHYSICS/ TECTONOPHYSICS T15 T15, TP16 S19 I P T17 GEOSCIENCE INFORMATION S18 P I HISTORY I S30, P T30, T32, T31, T32, HYDROGEOLOGY T29 T35 T34 S15, T34 T41T36, I T37, P S27, T40 II MARINE I P MICROPALEONTOLOGY S28 P I MINERALOGY/ CRYSTALLOGRAPHY S31, P T26, I T27 S26, TP27 T28 T28 PALEOCEANOGRAPHY/ TP2 I II P PALEOCLIMATOLOGY PALEONTOLOGY/ PALEOBOTANY I II S29 III, P IV V VI PETROLEUM IP PETROLOGY, EXPERIMENTAL P I PETROLOGY, IGNEOUS I T22 II P PETROLOGY, METAMORPHIC P I II PLANETARY/REMOTE SENSING T25 TP24, I S17 P T27 T23,TP27 PRECAMBRIAN I T18 T19 T20 P PUBLIC POLICY S9 S3 S25 S23 QUATERNARY/ P I S16 T4, T51, III, P T48 T39, IV T3, V GEOMORPHOLOGY II SEDIMENTS, CARBONATE P I II SEDIMENTS, CLASTIC T1 TP1, I S5 P II III STRATIGRAPHY T5 T5 P I II T46 STRUCTURE S20 I T13, II, P T14, III TP14 TECTONICS T7, I II S24, T6 III IV T11, V T12, P T10, TP12, VI VOLCANOLOGY TP21 T21, P Possible Biogenic Activity in Martian Meteorite ALH84001 Sponsored by the GSA Planetary Geology Division. Tuesday, October 29, 5:45 to 7:30 p.m., Colorado Convention Center, Ballroom 2-3 This session represents the first opportunity for the geoscience community to obtain first-hand information about what could be a funda- mentally important discovery. The session will involve presentations by one of the authors of the Science paper (August 16) and an expert on the Martian meteorites, Harry McSween of the University of Tennessee, followed by a question-and-answer period. The momentous but controversial nature of the topic should lead to a stimulating discussion.

GSA TODAY, September 1996 E-mail: [email protected] 17 Session 94, 1:30 PM, CCC:Posters Hall B1 Session 116, 8:00 AM, CCC:A108 Session 138, 1:30 PM, CCC:C201-205 Remote Sensing Posters Paleontology/Paleobotany III— Paleontology/Paleobotany IV—Taphonomy, Session 95, 1:30 PM, CCC:C201-205 Mineralization and Phylogeny—Building Life Vertebrates, and Biogeography Sedimentary Geology Division Symposium Session 117, 8:00 AM, CCC:Posters Hall B1 Session 139, 1:30 PM, CCC:A105-107 (S5): Dimensional Scaling and the Strati- Paleontology/Paleobotany Posters Stratigraphy II graphic Record of Episodic and Periodic Session 118, 8:00 AM, CCC:C102-104-106 Session 140, 1:30 PM, CCC:C102-104-106 Forcing Quaternary Geology/Geomorphology III— Tectonics V—Asian Tectonics Session 96, 1:30 PM, CCC:Posters Hall B1 Tectonic Geomorphology and Hillslope Session 141, 1:30 PM, CCC:Ballroom 2&3 SGE Symposium (S21): Student Research. Processes T11. Laramide Sedimentation and Tectonics (Posters) Session 119, 8:00 AM, CCC:Posters Hall B1 in the Rocky Mountains Session 97, 1:30 PM, CCC:C108-110-112 Quaternary Geology/Geomorphology Session 142, 1:30 PM, CCC:A111 Structural Geology II—Fault-fold Relations Posters II T19. Precambrian Lithosphere II: Mid- Session 98, 1:30 PM, CCC:Posters Hall B1 Session 120, 8:00 AM, CCC:A105-107 Proterozoic Magmatism and Tectonics of Structural Geology Posters Stratigraphy I Western North America Session 99, 1:30 PM, CCC:A202-204 Session 121, 8:00 AM, CCC:A101-103 Session 143, 1:30 PM, CCC:Posters Hall B1 Tectonics III—Ultrahigh P Metamorphism, Tectonics IV—Cordilleran Tectonics 2 T21. Volcanism, Tectonism, and Sedimenta- Forearc Tectonics, Oceanic Tectonics, Session 122, 8:00 AM, CCC:A111 tion in the Rio Grande Rift and its Margins in Foreland Basins T18. Precambrian Lithosphere I: Proterozoic New Mexico and Colorado—Part I (Posters) Session 100, 1:30 PM, CCC:A102-104-106 Tectonics—Modification of Archean Cratons Session 144, 1:30 PM, CCC:A201 T04. Quaternary Geology and Geomorphol- and Additions of Juvenile Crust T22. Magma Generation and Evolution at ogy Division: Application of Soil-Based Session 123, 8:00 AM, CCC::C201-205 Convergent Margins Information for Understanding Earth T27. MSA and Planetary Division: Mineralogy Session 145, 1:30 PM, CCC:A101-103 Surface Processes of Planetary Surfaces Using In-Situ Analysis T23. High and Ultrahigh Strain Rate Session 101, 1:30 PM, CCC:A205 and Remote Sensing—Part I Processes in the Earth and Planetary T13. Geologic and Hydrologic Studies of Session 124, 8:00 AM, CCC:C207 Sciences Fluid Flow in Faults T33. Geofluids: The Role of Fluids in Crustal Session 146, 1:30 PM, CCC:Posters Hall B1 Session 102, 1:30 PM, CCC:A108 Processes—Part I T27. MSA and Planetary Division: Mineralogy T41. Hydrogeology Division: Diagenetic Session 125, 8:00 AM, CCC:A201 of Planetary Surfaces Using In-Situ Analysis Processes at Waste-Disposal Sites T36. Hydrogeology Division: Physical and Remote Sensing—Part II (Posters) Session 103, 1:30 PM, CCC:C209 and Chemical Heterogeneity: Impact on Session 147, 1:30 PM, CCC:Posters Hall B1 T43. IEE: Environmental Geology: The Voice Reactive Transport T33. Geofluids: The Role of Fluids in Crustal of Reason Session 126, 8:00 AM, CCC:C105-107 Processes—Part II (Posters) Session 104, 1:30 PM, CCC:C207 T54. NAGT: Improving Geoscience Courses Session 148, 1:30 PM, CCC:C109 T51. Mechanics of the Riverbed: Hydrology, Through the Use of the Internet and the T37. Hydrogeology Division: Innovations and Sedimentology, and Geomorphic World Wide Web—Part I Applications of Inverse Ground-water Models Consequences Session 127, 8:00 AM, CCC:Posters Hall B1 Session 149, 1:30 PM, CCC:A202-204 Session 105, 1:30 PM, CCC:Posters Hall B1 T59. Geology Field Camp Exercises in the T38. Hydrogeology Division and Engineering T52. Geographic Information Systems and Rocky Mountains. (Posters) Geology Division: Evaporite Karst: Origins, Integrated Digital Databases: Tools for Session 128, 8:00 AM, CCC:A202-204 Processes, Landforms, Examples, and Impacts Geoscience Analysis—Part I (Posters) T60. NAGT and IEE: Linking Natural and Session 150, 3:30 PM, CCC:C109 Session 106, 1:30 PM, CCC:A101-103 Social Systems in Geoscience Education: T47. IEE: The Impact of Geologic Hetero- T58. The Role of Geology Field Camp in the Pedagogy, Content, and Context—Part I geneities on Characterization, Transport, and Geology Curriculum: An Appraisal—Part II. Session 129, 8:00 AM, CCC:A207-209 Remediation of Non-Aqueous Phase Liquids T62. SEG: The Magmatic-Hydrothermal- (NAPL’s) at Hazardous Waste Sites Wednesday, October 30, AM Epithermal Transition and Associated Session 151, 1:30 PM, CCC:C108-110-112 Session 107, 8:00 AM, CCC:Ballroom 2&3 Alteration and Mineralization—Part I T48. IEE: Rates of Geologic Processes in the 1996 GSA Annual Meeting Committee Holocene Symposium (S2): Tectonic Development Wednesday, October 30, PM Session 152, 1:30 PM, CCC:C105-107 of the Southern Rocky Mountains. Session 130, 1:30 PM, CCC:A205 T54. NAGT: Improving Geoscience Courses Session 108, 8:00 AM, CCC:C108-110-112 Carbonate Sedimentology II—Ancient Through the Use of the Internet and the 1996 GSA Annual Meeting Committee Carbonate Processes, Dolomites, Cements, World Wide Web—Part II Symposium (S4): Earth System Processes at and Diagenetic Models the Last Glacial Maximum. Session 131, 1:30 PM, CCC:C209 Session 109, 8:00 AM, CCC:A205 Geochemistry II—Low Temperature Fourth Annual Carbonate Sedimentology I—Modern Geochemistry President’s Carbonate Processes, Nannobacteria, Session 132, 1:30 PM, CCC:Posters Hall B1 Glauconite, Cyclostratigraphy, Chemo- Geology Education Posters Student Forum stratigraphy, and Breccias. Session 133, 1:30 PM, CCC:Posters Hall B1 Wednesday, October 30, 4:00 to Session 110, 8:00 AM, CCC:Posters Hall B1 Hydrogeology Posters 5:30 p.m.; Colorado Convention Center, Clastic Sedimentology Posters—Sedimentary Session 134, 1:30 PM, CCC:C101-103 Room A206. Sponsored by GSA Council. Processes and Petrology IEE, GSA International Division, and IUGS Session 111, 8:00 AM, CCC:C101-103 Commission on the Management and Outgoing GSA President Eldridge Engineering Geology Division of GSA Application of Geoscience Information M. Moores and incoming GSA Presi- Symposium (S14): Engineering Geology (COGEOINFO) Symposium (S23): Geoscience dent George A. Thompson invite all Applications of Geologic Maps. Information for Tomorrow’s Markets: What is students to an informal meeting to Session 112, 10:00 AM, CCC:C109 Wrong with the Present Products? discuss such topics as: What are your Geophysics Session 135, 1:30 PM, CCC:A108 Session 113, 8:00 AM, CCC:C109 Metamorphic Petrology I perceptions of GSA? How does GSA Geoscience Information Session 136, 1:30 PM, CCC:A102-104-106 meet your needs? What does GSA do Session 114, 8:00 AM, CCC:A102-104-106 MSA , Clay Mineral Society (S26): Environ- well? How could GSA improve? Hydrogeology I—Physical and Chemical mental Mineralogy: Science and Politics Please come and help us explore Session 115, 8:00 AM, CCC:C209 Session 137, 1:30 PM, CCC:C207 how to make GSA better. Compli- Igneous Petrology I Paleoceanography/Paleoclimatology II— mentary beverages will be available. Quaternary Climates and Oceans

18 http://www.geosociety.org • fax (303) 447-0648 • phone (303) 447-2020 GSA TODAY, September 1996 Session 153, 1:30 PM, CCC:Posters Hall B1 T60. NAGT and IEE: Linking Natural and Social Systems in Geoscience Education: Pedagogy, HOT TOPICS AT NOON Content, and Context—Part II (Posters) Session 154, 1:30 PM, CCC:A207-209 POPULAR SCIENTIFIC DEBATES FOR EVERYONE T62. SEG: The Magmatic-Hydrothermal- ORGANIZED BY JOHN WARME Epithermal Transition and Associated Alteration and Mineralization—Part II Monday, October 28 through Thursday, October 31, 12:15 to 1:15 p.m., Colorado Convention Center, A207-209. Thursday, October 31, AM Join your colleagues in spirited lunch-time debates. Keeping with the Session 155, 8:00 AM, CCC:A202-204 Clastic Sedimentology II—Marine and theme, hot and mild red and green chili along with beer and soft drinks Coastal Processes will be available for purchase outside the debate room. Bring your lunch. Session 156, 8:00 AM, CCC:Posters Hall B1 Engineering Geology Posters Monday Wednesday Session 157, 8:00 AM, CCC:C108-110-112 Chicxulub: How Did It Do It?— Life’s New Twist: The Precambrian- Environmental Geology The K-T Boundary, Mass Extinc- Cambrian Explosion of Life. Session 158, 8:00 AM, CCC:A201 tion, and the Post-Chicxulub Era. Moderator: Jere Lipps, Museum of Geology Education II Moderator: Philippe Claeys, Museum Paleontology, University of Califor- Session 159, 8:00 AM, CCC:Posters Hall B1 Geophysics/Tectonophysics Posters für Naturkunde, Berlin, Germany. nia, Berkeley. Session 160, 8:00 AM, CCC:A102-104-106 Invited speakers include: Invited speakers include: Stefan Hydrogeology Division Symposium (S27): Joanne Bourgeois, University of Bengtson, Swedish Museum of Nat- The Role of Preferential Flow in the Unsaturated Zone Washington; Gregory Retallack, ural History, Stockholm; Sandy Carl- Session 161, 8:00 AM, CCC:C105-107 University of Oregon, Eugene. son, University of California, Davis; Igneous Petrology II It is now difficult to argue Charles Marshall, University of Cali- Session 162, 8:00 AM, CCC:Posters Hall B1 against a large-sized impact at the fornia, Los Angeles; Douglas Erwin, Marine Geology Posters K-T boundary, but we still need to National Museum of Natural History, Session 163, 8:00 AM, CCC:C101-103 document and clarify more fully the Smithsonian Institution. Metamorphic Petrology II mechanisms leading to the extinc- The Precambrian-Cambrian Session 164, 8:00 AM, CCC:Posters Hall B1 tion of organisms across the bound- explosion of life has not been satis- Paleoceanography/Paleoclimatology Posters ary. How can this be accomplished factorily explained or interpreted. Session 165, 8:00 AM, CCC:C209 Paleontology/Paleobotany V—Problematica with testable results? Many hypotheses have been sug- and Miscellaneous Mollusks gested, though none is generally Session 166, 8:00 AM, CCC:A108 Tuesday accepted. The discussion will focus Petroleum Geology on this important and controversial Bald Uprights from the Pleisto- Session 167, 8:00 AM, CCC:C102-104-106 event in biotic history. Quaternary Geology/Geomorphology IV— cene: Paleoclimate Influence on Quaternary Glacial Events Human Evolution. Thursday Session 168, 8:00 AM, CCC:C109 Moderator: Craig Feibel, Rutgers Structural Geology III—Pluton Emplacement University. Fossil Collecting Laws. and Regional Structures Invited speakers include: Peter Moderator: Richard Stucky, Denver Session 169, 8:00 AM, CCC:Posters Hall B1 Museum of Natural History. Tectonics Posters deMenocal, Lamont-Doherty Earth Session 170, 8:00 AM, CCC:C201-205 Observatory, Columbia University; In recent years, legislation has T12. History of Recurrent Basement Faulting Rick Potts, Smithsonian Institution; been proposed to regulate and/or in Cratonic North America and its Orogenic Steven Stanley, Johns Hopkins deregulate fossil collecting from Margins—Part I University; Elisabeth Vrba, Yale public lands. Some paleontologists Session 171, 8:00 AM, CCC:A205 T14. Evolution of the Neogene Strain Field in University. believe that there should be no reg- the Southeastern Great Basin: Roles of Climatic shifts in Pliocene- ulations, whereas others believe Faults, Folds, and Magmatism—Part I Pleistocene time dramatically that all fossil vertebrates and scien- Session 172, 8:00 AM, CCC:A111 changed the face of the planet at tifically important specimens T20. Precambrian Lithosphere III: Middle the same time that critical evolu- should be placed into public reposi- Crustal Processes tionary steps were being taken in tories. This discussion will examine Session 173, 8:00 AM, CCC:A207-209 T28. MSA and Clay Mineral Society: Africa. How were global climatic the basic principles underlying the Environmental Mineralogy—Part I trends felt in Africa, and what were protection of fossils from public Session 174, 8:00 AM, CCC:A101-103 the ecological and habitat changes lands. A vertebrate paleontologist, T39. The Death Valley Hydrogeologic System that fostered this unusual lineage? invertebrate paleontologist, and Session 175, 8:00 AM, CCC:C207 To what extent can we tie the criti- paleobotanist will provide back- T40. Hydrogeology Division: Physical and cal stages of early human evolution ground on the kinds of regulations Chemical Heterogeneity: Impact on Samples and Measurements at Wells to major events in climatic, tectonic, or lack thereof which would best Session 176, 8:00 AM, CCC:A105-107 and biotic change? promote their science. Information T52. Geographic Information Systems and will also be provided on the recently Integrated Digital Databases: Tools for proposed legislation in the House of Geoscience Analysis—Part II Representatives and how well it Session 177, 8:00 AM, CCC:Ballroom 2&3 meets the needs of paleontologists. T63. SEG: Quantifying the Environmental Impacts of Mining—Part I

GSA TODAY, September 1996 E-mail: [email protected] 19 Thursday, October 31, PM Session 178, 1:30 PM, CCC:C109 Aqueous Geochemistry III—Geochemistry of Graduate School Information Forum Surface and Groundwaters Colorado Convention Center, Hall A Session 179, 1:30 PM, CCC:C207 Clastic Sedimentology III—Continental Sedi- Shortcut your search for the right graduate school by coming to the GSA mentary Deposits Annual Meeting in Denver. Meet with representatives from universities across Session 180, 1:30 PM, CCC:C108-110-112 the nation without spending travel time and money to go to each school for inter- Economic Geology III—Archaen Deposits and Geochronology views. The schools participating (at press time) are listed below. Session 181, 1:30 PM, CCC:A201 Individual appointments are not necessary, although students are welcome Geology Education III to contact the schools in advance to schedule a meeting time. If you would like to Session 182, 1:30 PM, CCC:A202-204 receive a complete list of schools, with the contact person and telephone num- Hydrogeology II ber, contact Matt Ball, GSA Meetings Department, E-mail: [email protected]. Session 183, 1:30 PM, CCC:Posters Hall B1 Igneous Petrology Posters Session 184, 1:30 PM, CCC:C105-107 Monday Tuesday Wednesday Micropaleontology Participating Schools Oct. 28 Oct. 29 Oct. 30 Session 185, 1:30 PM, CCC:C209 Paleontology/Paleobotany VI—Paleo Cubed Clemson University • • Session 186, 1:30 PM, CCC:Posters Hall B1 Petroleum Geology Posters CUNY Graduate School and University Center • Session 187, 1:30 PM, CCC:Posters Hall B1 Duke University • Precambrian Geology Posters Florida International University • Session 188, 1:30 PM, CCC:Posters Hall B1 Precambrian Lithosphere I, II, III Posters Indiana University • • Session 189, 1:30 PM, CCC:C102-104-106 Iowa State University of Science and Technology • • Quaternary Geology/Geomorphology V— Montana Tech of the University of Montana • Quaternary Paleoclimate Session 190, 1:30 PM, CCC:C201-205 New Mexico Institute of Mining and Technology • Tectonics VI—Appalachian-Caledonian- New Mexico State University • Variscan Tectonics Pennsylvania State University • Session 191, 1:30 PM, CCC:Posters Hall B1 Volcanology Posters Rice University • Session 192, 1:30 PM, CCC:C101-103 Southern Illinois University at Carbondale • T03. Quaternary Geology and Geomorphol- ogy Division: High-Resolution Glacial State University of New York at Binghamton • Records from Marine and Lacustrine Basins Texas Tech University • • Session 193, 1:30 PM, CCC:A108 Universidad de Sonora • T10. Northeastern, Southeastern, Cordilleran Sections of GSA: Appalachian and Cordilleran University of Alabama • Melanges: Comparisons and Contrasts University of Alaska • • Session 194, 1:30 PM, CCC:Posters Hall B1 T12. History of Recurrent Basement Faulting University of California, Riverside • • in Cratonic North America and its Orogenic University of Colorado • • Margins—Part II (Posters) University of Delaware • Session 195, 1:30 PM, CCC:Posters Hall B1 T14. Evolution of the Neogene Strain Field in University of Kansas • the Southeastern Great Basin: Roles of Faults, University of Kentucky • Folds, and Magmatism—Part II (Posters) Session 196, 1:30 PM, CCC:A205 University of Maryland at College Park • • T17. Geophysics Division: Cenozoic Uplift of University of Massachusetts • the Western United States University of Missouri, Columbia • Session 197, 1:30 PM, CCC:A102-104-106 T21. Volcanism, Tectonism, and Sedimenta- University of Nebraska, Lincoln • • • tion in the Rio Grande Rift and its Margins in University of Nevada, Reno • New Mexico and Colorado—Part II Session 198, 1:30 PM, CCC:A207-209 University of North Carolina, Chapel Hill • T28. MSA and Clay Mineral Society: Environ- University of North Dakota • mental Mineralogy—Part II University of Notre Dame • • • Session 199, 1:30 PM, CCC:A111 T45. IEE: Integrated Site Characterization for University of Tennessee • • Waste Disposal University of Texas at Arlington • • Session 200, 1:30 PM, CCC:A101-103 T46. Interpretation of Continental Sedimentation University of Texas at Dallas • • Patterns Using Surface and Subsurface Data University of Utah • Session 201, 1:30 PM, CCC:A105-107 Utah State University • T52. Geographic Information Systems and Integrated Digital Databases: Tools for Geo- Vanderbilt University • science Analysis—Part III Virginia Polytechnic Institute and State University • • Session 202, 1:30 PM, CCC:Ballroom 2&3 T63. SEG: Quantifying the Environmental West Virginia University • Impacts of Mining—Part II Yale University • • •

20 E-mail: [email protected] GSA TODAY, September 1996

Preliminary Announcement and Call for Papers Graduate Liberal Studies Program, Wes- leyan University, Middletown, CT 06459, (860) 685-3339, [email protected].; NORTHEASTERN SECTION, GSA Dick Benson, Delaware Geological Survey, 32nd Annual Meeting University of Delaware, Newark, DE 19716, (302) 831-8259, [email protected]. King of Prussia, Pennsylvania 4. Biogenic Influences on Sedimenta- March 17–19, 1997 tion. (Sponsored by SEPM) Kathy Browne, Dept. of Geological and Marine Sciences, Rider University, 2083 Lawrenceville Road, Lawrenceville, NJ 08648, (609) 895-5408, he hosts for the 1997 meeting of the Geological Society of America Northeastern [email protected].; Bob Demicco, Section are geologists from Bryn Mawr College, the Delaware Geological Survey, Dept. of Geological Sciences, SUNY at LaSalle University, Montgomery County Community College, Pennsylvania State T Binghamton, Binghamton, NY 13902, University—Ogontz, Temple University, the University of Delaware, Villanova Univer- (607) 777-2604, [email protected]. sity, West Chester University, Emrich & Associates, ERM Group, and the Pennsylvania binghamton.edu. Department of Environmental Protection. Meeting in conjunction with the GSA 5. Freshwater Ecosystems of the Northeastern Section will be the Eastern Section of SEPM, Northeastern Section of the Catskill Delta: Stratigraphic, Sedi- Paleontological Society, Eastern and New England Sections of the National Association mentological, and Paleontological of Geoscience Teachers, and Association of Women Geoscientists. Approaches. (Sponsored by SEPM) Neil The meeting will be at the Valley Forge Sheraton Hotel, King of Prussia, Pennsylva- Shubin, Dept. of Geology, University of nia, near Valley Forge National Park. Pennsylvania, Philadelphia, PA 19104, (215) 898-5724. CALL FOR PAPERS listed) contact person for that particular 6. Paleontology in Science Educa- symposium. tion. (Sponsored by the Northeastern Section Papers are invited from students and Abstracts will be reviewed for content, of the Paleontological Society) Jeff Over, professionals for presentation in oral and originality, and format. Only one volun- Dept. of Geological Sciences, SUNY, Col- poster general sessions and theme (volun- teered paper may be presented by an indi- lege at Geneseo, 1 College Circle, Geneseo, teered) sessions. Presentations that may fit vidual; however, a person may also be a NY 14454, (716) 245-5294 or 5291, into one of the symposia (mostly invited coauthor on papers presented by others. [email protected].; Steve Good, papers) are also solicited. If you wish to Additional papers may be presented by Dept. of Geology, SUNY, College at Cort- present a paper at a symposium, contact individuals invited for symposia. land, Cortland, NY 13045, (607) 753-5697, the convener of the symposium and/or [email protected]. indicate on the submitted abstract that the ABSTRACTS ARE DUE BY 7. Biotic Response to Global Change abstract be considered for a particular sym- November 12, 1996. (Fossils as Clues to Global Change: posium. Geochemical and Faunal Assemblage Oral general technical and theme ses- SYMPOSIA Indicators). (Sponsored by the Northeast- sions will include 15 minutes for presenta- The following symposia are planned ern Section of the Paleontological Society) Jeff tion and 5 minutes for discussion. Two 35 for the 1997 meeting. Symposia will Over, Dept. of Geological Sciences, SUNY, mm carousel projectors and two screens include invited papers and selected volun- College at Geneseo, 1 College Circle, will be provided for each oral session. All teered papers. Prospective authors are Geneseo, NY 14454, (716) 245-5294 or slides must fit into a standard carousel encouraged to contact the conveners 5291, [email protected]. tray. An overhead projector will be avail- directly. General information regarding 8. Cyclic Hierarchies: Fabric of the able for each oral session. symposia may be obtained by contacting Stratigraphic Record or Figments Poster sessions will allow at least three Richard N. Benson, Technical Program of Stratigraphic Imagination? hours of display time; authors must be Co-chairman, Delaware Geological Survey, Peter Goodwin, Dept. of Geology, Temple present for two hours. University of Delaware, Newark, DE University, Philadelphia, PA 19122, (215) 19716-7501, (302) 831-8259, 204-8229; Edwin Anderson, Dept. of Geol- ABSTRACTS [email protected]. ogy, Temple University, Philadelphia, PA Abstracts must be submitted camera- 1. Finding the Adirondacks’ Place 19122, (215) 204-8249. ready on the official 1997 GSA section in the Grenville. James Alcock, College 9. The Influence of Sir Charles Lyell’s meeting abstract form in accordance with of Earth and Mineral Sciences, Penn Mid–19th Century Visits to North instructions on that form (e.g., about 250 State University, Ogontz Campus, 1600 America. Tom Pickett, 11236 Black words). Abstract forms are available from: Woodland Road, Abington, PA 19001, Walnut Point, Indianapolis, IN 46236, Abstracts Coordinator, Geological Society (215) 881-7356, [email protected].; (317) 823-2933, INME100@INDYCMS. of America, P.O. Box 9140, Boulder, CO Peter Muller, Dept. of Earth Sciences, IUPUI.EDU; Don Hoskins, Bureau of 80301, (303) 447-2020, ext. 161, or E-mail: Ravine Parkway, SUNY, College at Topographic and Geologic Survey, P.O. [email protected]. Oneonta, Oneonta, NY 13820, (607) 436- Box 8453, Harrisburg, PA 17105, (717) Send one original and five copies of 3707, [email protected]. 787-2169, [email protected]. abstracts to be considered to: Allan M. 2. Tectonic Connections Between the 10. Superfund Successes. Grover Thompson, Technical Program Co-chair- Northern and Southern Appalachi- Emrich, Emrich and Associates, 1488 man, Dept. of Geology, University of ans. Alec Gates, Dept. of Geological Hancock Lane, Wayne, PA 19087-1119, Delaware, Newark, DE, 19716-2544, (302) Sciences, Rutgers University, Newark, (610) 296-5068, [email protected]; Charles 831-2585, E-mail: [email protected]. NJ 07102, (201) 648-5034, gates@ Bandoian, ERM Group, 855 Springdale Authors of invited (symposium) papers, andromeda.rutgers.edu.; David Valentino, Drive, Exton, PA 19341, (610) 524-3510. and those who think their paper might be Dept. of Physical Sciences, Concord Col- 11. Well-Head Protection. Charles suitable for inclusion in a symposium or lege, Athens, WV 24712, (304) 384-5238, Bandoian, ERM Group, 855 Springdale theme session should send an extra copy [email protected]. Drive, Exton, PA 19341, (610) 524-3510; of the abstract to the appropriate (first 3. Flood Basalts and Margin Magmas Grover Emrich, Emrich and Associates, of the Atlantic Rift. Greg McHone,

22 GSA TODAY, September 1996 1488 Hancock Lane, Wayne, PA 19087, but must be the result of the student’s SHORT COURSES (610) 296-5068, [email protected]. own participation in undergraduate Two short courses will be offered on research programs. Larry Malinconico, Sunday, March 16. Preregistration is THEME SESSIONS Dept. of Geology, Lafayette College, Eas- required for both. For details, contact ton, PA 18042, (610) 250-5193, malincol@ The 1997 GSA Northeastern Section Gene C. Ulmer, Dept. of Geology, Temple lafayette.edu. meeting committee invites papers related University, Philadelphia, PA 19122, Environmental Geology. POSTER to the following broad themes of current (215) 204-7171. SESSIONS. Grover Emrich, Emrich and interest. These sessions are similar to sym- 1. Aminostratigraphy. Applications of Associates, 1488 Hancock Lane, Wayne, PA posia in their focus on specific topics, but amino acid racemization geochemistry to 19087, (610) 296-5068, [email protected]; each is an open forum where the papers the geochronology and stratigraphy of Charles Bandoian, ERM Group, 855 are volunteered. Prospective authors are Quaternary deposits. John F. Wehmiller, Springdale Drive, Exton, PA 19341, encouraged to contact the appropriate Dept. of Geology, University of Delaware, (610) 524-3510; Ben Greeley, Pennsylvania session conveners directly. The following Newark, DE 19716, (302) 831-2926, jwehm@ Department of Environmental Protection, theme sessions have been proposed and udel.edu. Bureau of Water Supply & Community will be held under these titles if enough 2. Geoscience Courseware Workshop. Health, 555 North Lane, Suite 6010, relevant papers are submitted. If insuffi- Addresses the needs of educators who Conshohocken, PA 19428, (610) 832-6055, cient papers are received, submitted papers wish to use the latest technology in their [email protected]. will be considered for regular technical courses, but are limited by tight budgets 7. Superfund Cleanup oral or poster sessions. or by lack of technical know-how. Declan 8. Philadelphia Naval Base 1. Frontiers of Mineralogy. Darby DePaor, Earth’nWare, Inc., 148 Cadish Redevelopment Dyar, Dept. of Geology and Astronomy, Ave., Hull, MA 02045-1643, (617) 9. Redevelopment of Past Industrial West Chester University, West Chester, PA 925-0264, [email protected]. Sites: Pennsylvania Act II (Brown- 19383, (610) 436-2727, [email protected]. Additional workshops may include: fields) 2. Economic Mineral Deposits of Groundwater Hydrocarbon Remediation 10. Coal Mine Reclamation Northeastern North America. Bill Workshop and Milankovitch Cyclicity: 11. Surface Water Hydrology: 1996 Kelly, New York State Geological Survey, A Drill Core Workshop. Northeast Pennsylvania Floods 3140 Cultural Education Center, Albany, NY 12230, (518) 474-7559, wkelly@ EXHIBITS K–12 TEACHER EVENT museum.nysed.gov; Bob Altamura, Dept. Exhibit space will be available in the of Geology and Planetary Science, Univer- An all-day workshop will be held on hall that serves as a passageway to the sity of Pittsburgh, Johnstown, PA 15904. Sunday, March 16. The following topics poster sessions at the Valley Forge Shera- 3. Current Research in Sand will be covered: Paleobiology and the Ori- ton. Booths will be available for exhibitors Resources of the Inner Continental gin of Coal; Dinosaurs, the Historic Marsh- during the entire meeting, 8:00 a.m., Shelf. (Sponsored by SEPM) Jane Uptegrove, Cope Debates on the Warm-bloodedness Monday, March 17, to noon, Wednesday, New Jersey Geological Survey, CN 427, of Dinosaurs; Local Five County Geology March 19. Reduced rates are available for Trenton, NJ 08625, (609) 292-2576, (Pennsylvania and New Jersey); Geology of educational or nonprofit groups. A limited [email protected]; Bob Conk- the State of Pennsylvania; Environmental number of table exhibits will be available wright, Maryland Geological Survey, Problems of the Tristate Area. For more at a reduced cost. For further information 2300 St. Paul St., Baltimore, MD 21218, details contact: Gene C. Ulmer, Dept. of and space reservation, contact C. Gil (410) 554-5500, [email protected]. Geology, Temple University, Philadelphia, Wiswall, Exhibits Coordinator, Dept. of 4. Nearshore Processes and the PA 19122, (215) 204-7171. Geology and Astronomy, West Chester Development of the Coastal Strati- University, West Chester, PA 19383, (610) graphic Record. Sue Halsey, Division STUDENT AWARDS AND 436-2570, [email protected]. of Science and Research, Dept. of Environ- TRAVEL ASSISTANCE mental Protection and Energy, State SPECIAL EVENTS Awards will be given for the best oral of New Jersey, Trenton, NJ 08625, paper and best poster session presented by Breakfast and luncheon meetings will (609) 292-0950, [email protected]; students. Although the faculty mentor include Paleontological Society, Northeast- Nicholas Coch, Queens College (CUNY), may appear as the junior author, a major ern Section; National Association of Geo- Dept. of Geology, Flushing, NY 11367-0904, part of the paper or poster session must science Teachers, Eastern and New Eng- (718) 997-3326; Dan Belknap, Dept. of represent work by the student author. land Sections; SEPM, Eastern Section; Geological Sciences, University of Maine NOTE: Papers submitted for this award Association for Women Geoscientists; and at Orono, Boardman Hall 5711, Orono, should be so designated at the bottom of GSA Northeastern Section Management ME, (207) 581-2159, belknap@maine. the abstract form. Board. maine.edu. The Northeastern Section of GSA will The welcoming reception will be 5. Geological Applications of GIS. award travel grants to students who give Sunday, March 16. The GSA Northeastern Mary Jo Hall, Dept. of Geological and papers (oral or poster) of which he or she Section Reception and Banquet will be Marine Sciences, Rider University, is the presenter and author or coauthor at Monday, March 17. Lawrenceville, NJ 08648, (609) 895-5416, the meeting. In addition, the Northeastern [email protected]; Randy Kerhin, Section will award student research grants HOUSING Maryland Geological Survey, 2300 St. Paul to undergraduate students in 1997. St., Baltimore, MD 21218, (410) 554-5544, A large block of rooms has been Applications for travel assistance and [email protected]. reserved for meeting participants at the guidelines for student research grants may 6. Undergraduate Research. POSTER Valley Forge Sheraton, the convention be obtained from Kenneth N. Weaver, SESSION (Sponsored by the Geology Division, site. It has easy access by road and ample Secretary-Treasurer, Northeastern Section, Council on Undergraduate Research) Students free open-air parking. For conference plan- GSA, c/o Maryland Geological Survey, must be listed as the authors and must ning and to ensure guaranteed room rates, 2300 St. Paul Street, Baltimore, MD have been the major preparer of the 21821-5210, (410) 554-5532, fax 410- poster. Topics may vary over a broad 554-5502. spectrum (e.g., see GSA abstract form), Northeastern continued on p. 24

GSA TODAY, September 1996 23 Preliminary Announcement and Call for Papers Texas Tech University; and Kate Miller, UT El Paso. 3. Mesozoic Redbeds of Mexico. SOUTH-CENTRAL and Claudio Bartolini, UT El Paso, Jaime Rueda ROCKY MOUNTAIN SECTIONS, GSA Gaxiola, Universidad Nacional Autónoma de México; Mario Aranda, PEMEX; and Joint Annual Meeting Wolfgang Stinnesbeck, Universidad Autónoma de Nuevo Leon. El Paso, Texas 4. Rio Grande Rift: Its Geology and March 20–21, 1997 Geophysics. G. Randy Keller, Libby Anthony, and Wendi Williams, UT El Paso. 5. Environmental Geology and he Departments of Geological Sciences of the University of Texas at El Paso Hydrogeology of Intermontane and New Mexico State University invite you to the annual meeting of the Basins. Greg Ohlmacher and John Wal- T South-Central and Rocky Mountain Sections of the Geological Society of America. ton, UT El Paso, and Mike Whitworth, The meeting will be held Thursday, March 20, and Friday, March 21, on the University New Mexico Tech. of Texas at El Paso campus during spring break. All field trips are scheduled for the 6. Mesozoic Geologic History of the weekend after the meeting. Southern United States and Mexico. Tim Lawton, Kate Giles, and Nancy McMillan, New Mexico State University. LOCATION CALL FOR PAPERS 7. Recent Advances in the Economic El Paso, Texas, is located at the junc- Papers are invited for presentation Geology of Mexico and Adjacent tion of Texas, New Mexico, and Mexico. in oral sessions, symposia, and poster ses- Areas. Ken Clark, UT El Paso. Its sister city, across the Rio Grande, is sions. Oral presentations will be 17 min- 8. Using Multimedia in the Class- Ciudad Juarez. It is easily reached via U.S. utes, with 3 minutes for questions. Poster room. Vicki Harder, UT El Paso. Interstate Highways 10 and 25 and has sessions will be set up for four hours, and 9. Geology and Public Policy: The inexpensive air connections via America authors will be available for two hours. Political Education of a Scientist. West, American, Continental, Frontier, Volunteered abstracts not included Joe Yelderman, Baylor University. Southwest, and Aeromexico. in symposia will be scheduled for regular 10. New Refinements of the The name El Paso has rich historical technical sessions. Anyone wishing to Geochronology of Events in the significance. It is a shortened version of organize a symposium should contact Western U.S. and Mexico. Bill McIn- El Paso del Rio del Norte, the name given Elizabeth Anthony, Dept. of Geological tosh and Matt Heitzler, New Mexico Tech. to the pristine river valley by conquistador Sciences, University of Texas, El Paso, 11. Undergraduate Student Don Juan de Onate more than four cen- TX 79968-0555, (915)747-5483, fax: 915- Research. Betsy Julian, UT El Paso, and turies ago. Through this pass, today 747-5073, E-mail: [email protected]. Diane Smith, Trinity University. Sponsored marked as a historic monument, Spanish by the Geology Division of the Council on explorers found their way into what is SYMPOSIA Undergraduate Research. now America, claiming it for the Spanish 1. Pander Society Conodont Crown. Visitors enjoy this city—its his- Symposium, Dave Lemone, UT El Paso, toric mission trail, beautiful mountain and James Barrick, Texas Tech University. vistas and desert sunsets, Mexican cuisine, 2. Precambrian Geology of the and colorful history—which offers the lure Western United States. Karl Karlstrom, South-Central–Rocky Mountain of the Old West and three distinct cultures University of New Mexico; Calvin Barnes, continued on p. 25 in two nations.

Mentor Program Graduate students and undergrad- uate seniors: The Roy J. Shlemon Notheastern continued from p. 23 headquarters. Registration forms will appear in the December 1996 issue of Mentors Program in Applied it is important that you reserve your room GSA Today. Geology is coming to all of your before February 14, 1997. Preregistration deadline: 1997 section meetings. This FEBRUARY 14, 1997 program can help you learn about CHILD CARE professional opportunities in the Child care arrangements will be DETAILED INFORMATION applied geosciences, as explained coordinated by Mary Louise Hill, Dept. of Complete information on registra- by leading private-sector practi- Geology, Temple University, Philadelphia, tion, accommodations, and activities will PA 19122, (215) 204-8226; E-mail: tioners in fields such as Quaternary appear in the December 1996 issue of [email protected]. geology, geomorphology, environ- GSA Today and as part of the Abstracts mental geology, engineering with Programs for 1997 mailed in late REGISTRATION February 1997. For additional information geology, and hydrogeology. For To obtain low registration fees and to or suggestions, contact the general chair- more information, contact your assist the local committee planning, please man, William A. Crawford, Dept. of section committee chair, section preregister. Special low fees will be avail- Geology, Bryn Mawr College, Bryn Mawr, secretary, or GSA’s Institute for able for students and K–12 schoolteachers. PA 19010-2899, (610) 526-5112, fax 610- Environmental Education. One-day registration fees will also be avail- 526-5086, preferably E-mail: wcrawfor@ able. Registration will be handled by GSA brynmawr.edu. ■

24 GSA TODAY, September 1996 South-Central–Rocky Mountain GSA section meeting abstract forms. STUDENT PAPERS AND continued from p. 24 These forms are available from the TRAVEL GRANTS Abstracts Coordinator, GSA, P.O. Box Awards will be presented to the best FIELD TRIPS 9140, Boulder, CO 80301, (303) 447-2020, student presentation in both oral and E-mail: [email protected]. The field trips are organized by New poster formats. Awards will be based on Send an original and five copies of Mexico State University. If you have ques- quality of research and effectiveness of the abstract (for both volunteered and tions concerning the trips, please contact presentation. Limited funds for travel invited papers) to: Elizabeth Y. Anthony, Nancy McMillan, Dept. of Geological expenses are also available. To be consid- Dept. of Geological Sciences, University Sciences, Box 3AB, New Mexico State ered for both a travel stipend and the best of Texas, El Paso, TX 79968-0555. University, Las Cruces, NM 88003, paper awards, students should attach a Indicate on the abstract your prefer- (505) 646-2708, fax 505-646-1056, note to their submitted abstract. William ence for a poster or oral session and the E-mail: [email protected]. Cornell, UT El Paso, will administer these symposium (if any) appropriate to your 1. Lower Mississippian Waulsortian student awards. research. GSA rules prohibit individuals Mounds, Sacramento Mountains. from presenting more than one volun- Kent Kirby, University of Minnesota; and PREREGISTRATION teered abstract, although they can be Kate Giles, New Mexico State University. coauthors on additional volunteered Preregistration deadline: 2. Stratal Architecture of Forestep- abstracts. Abstracts submitted for sym- February 7, 1997 ping and Backstepping Shallow posia are not affected by this limitation. Preregistration by mail will be han- Marine Sequences: The Upper Creta- Attendees are encouraged to order an dled by Professional and Continuing Edu- ceous Gallup and Hosta Sandstones, abstract booklet either with their GSA annual cation at UT El Paso. Registration forms San Juan Basin, New Mexico. Dag dues or with their preregistration for this will appear in the November 1996 issue Nummedal, UNOCAL, and Robyn Dunbar, Section Meeting. There will be only a limited of GSA Today. Please take advantage of Rice University. number of abstract booklets available for the lower registration fees and register by 3. Quaternary Landscape Evolution purchase on-site. February 7. All field trip participants must and Geo-Archaeology of the register for the meeting. Approximate El Paso–Las Cruces Region. Curtis PROJECTION EQUIPMENT registration fees are as follows. Preregistra- Monger, New Mexico State University. tion: GSA members—$50, nonmembers— 4. Ordovician El Paso Group Please bring your own loaded carousel $60, GSA student member—$25, non- Sequence Stratigraphy, Franklin trays. There will be two projectors for each member students—$30, K–12 teachers— Mountains, Texas. Robert Goldhammer, oral session. Overhead projectors will be $15, Mexican dinner—$15. On-site regis- Bureau of Economic Geology, University available upon request. Specifics of the tration: GSA members—$60, nonmem- of Texas at Austin, and Dave Lemone, UT poster session will be published in the bers—$70, GSA member students—$30, El Paso. final announcement. nonmember students—$35, K–12 teach- 5. Geochronology and Geochemistry ers—$15, Mexican dinner—$20. of the Potrillo Volcanic Field, New EXHIBITS Mexico. Wendi Williams and Libby Exhibit facilities for business, educa- HOTEL ACCOMMODATIONS Anthony, UT El Paso. tional, and governmental institutions will AND HOUSING 6. Beginning of the Age of Dinosaurs be available in the Student Union Build- on the Southern High Plains. Spencer We have reserved rooms in the ing. On-site registration, oral and poster Lucas, New Mexico Museum of Natural Camino Real Paso del Norte Hotel, a sessions, the welcoming party, and the History, and Adrian Hunt, Mesalands historic landmark. The hotel is a short Thursday evening dinner will be held in Museum. walk from the U.S.-Mexico border and is this building. Space rental is $125, which close to the border trolley, which allows will include one complimentary registra- ABSTRACTS one to shop and eat in Juarez. The special tion. Exhibitors are encouraged to set up rate is $75 single and $80 double. Cutoff Abstract Deadline: November 25, 1996. Wednesday afternoon for registration and date for reserving a room at this rate is Abstracts for all sessions must be the welcoming party. For information con- February 7, 1997. submitted camera-ready on official 1997 cerning exhibits, contact Nancy Wacker, We have also reserved dormitory Professional and Continuing Education, rooms on the UT El Paso campus. Rates Assistant Director for Conferences and are $15 single and $12 double and include Special Events, University of Texas at linen. Dormitory rooms can be reserved El Paso, 500 West University, El Paso, through the registration form, which will TX 79968-0602, (915)747-5142, fax 915- appear in the November GSA Today. VisitVisit thethe 747-5538, E-mail: [email protected]. OTHER INFORMATION SPECIAL EVENTS It is our goal that this program be Welcoming Party accessible to all persons. If you have spe- There will be a party beginning at cial dietary or physical needs, please state 7 p.m. on Wednesday, March 19. On-site GSAGSA them on the registration form or contact registration will be available, and those Nancy Wacker at the address given above. who have preregistered may pick up their More detailed information will appear name badges, tickets for the dinner, and BookstoreBookstore in the November GSA Today. If you would programs during this party. like to host a symposium or have ques- tions about the meeting, please contact West Texas Mexican Dinner the general chairperson, Elizabeth (Libby) There will be a Mexican dinner on =AT ALL THE Anthony (see Call for Papers). Thursday, March 20. It will be followed by Nos Vemos Pronto! ■ 1997 SECTION MEETINGS the special lecture. Tickets for the dinner must be purchased in advance.

GSA TODAY, September 1996 25 GSA Research Grants Awarded “Groundwater Hydraulics and Slope Sta- bility Analysis—Elements for Prediction of June Forstrom, GSA Grants Administrator Shoreline Recession”; Britt Norlander, University of Minnesota, “Dating the Propagation of Deformation in the Greenschist-facies Pennine Nappes, West- The GSA Committee on Research the Lipman Research Fund), $6,000 from ern Alps, Switzerland, Based on 40Ar/39Ar Grants met in Boulder, Colorado, March the Harold T. Stearns Award Fund, the and Rb-Sr Methods”; Julie Pickrell, 29–30, 1996, and awarded $349,625 to Sedimentary Geology Division, and the University of Idaho, “Stoichiometry and 218 graduate student applicants, and Structural Geology and Tectonics Division; Thermodynamics of Pd Hydroxide Com- $22,000 for the Gladys W. Cole and W. and $1,924 from funds returned too late plexes and PGE Bisulfide Complexes”; Storrs Cole Awards to two postdoctoral in 1995 to be re-awarded last year. The Stephen J. Porder, University of Montana, applicants. Committee members for 1996 budget also included $35,200 from the “Metamorphism of Wet Semi-Pelitic Sedi- are Mary L. Droser (Chair), James P. Hib- GSA Foundation, which included $10,000 ments Adjacent to a Large Basaltic Sill”; bard, Noel C. Krothe, Susan A. Longacre, from the Research Fund (including $2,000 Peter William Reiners, University of Wash- Peter C. Patton, Sheila J. Seaman, and from Mobil Oil), $14,950 from GEOSTAR ington, “Critical Test of Melt Migration Thomas O. Wright (National Science and Unrestricted funds, and $10,250 from Models from Sequences of Alkali Basalts Foundation conferee). various restricted special funds and the Erupted from Monogenetic Volcanic Engineering Geology, Geophysics, and Vents, Kauai, Hawaii”; Douglas Reusch, COLE AWARDS FOR POST- Hydrogeology Divisions. University of Maine, “Have Arc-Continent DOCTORAL RESEARCH The recipients of student research Collisions Cooled the Earth? Exhumation The Gladys W. Cole Memorial grants awarded by GSA Divisions and of New Guinea, 187Os/186Os–87Sr/86Sr–P Research Award for 1996 went to Vance Sections will be announced in the October CO2 Links, and Miocene Climate”; Mark Terrell Holliday, University of Wisconsin, issue of GSA Today. Skidmore, University of Alberta, “Rates of Madison, to support his project “Origin Outstanding Mention. The Chemical Denudation and CO2 Draw- and Evolution of Small Playa Basins on Committee on Research Grants specially down in a Glacier-covered High Arctic the Southern High Plains.” This award is recognized 22 of the proposals as being of Catchment”; Gary S. Solar, University of restricted to support research for the exceptionally high merit in conception Maryland, “Tracking Granite Magma investigation of the geomorphology of and presentation: Kari M. Cooper, Univer- Migration Through the Crust: Constraints semi-arid and arid terrains in the United sity of California, Los Angeles, “Cenozoic from Field Relations of Migmatites and Sr States and Mexico. Volcanic Activity Along the Northwestern in Garnet”; Bruce Randall Tufts, University The W. Storrs Cole Memorial Research Margin of the Tibetan Plateau and of Arizona, “Early or Late? The Timing of Award, which is restricted to support Implications for the History of the Altyn Crustal Block Rotation in the Eastern research in invertebrate micropaleontol- Tagh Fault”; Lisa A. Doner, University of Transverse Ranges, Southern California: ogy, was presented this year to Ellen Colorado, “Decadel-scale Proxy Records Structural and Geomorphic Tests at Pinto Thomas, Wesleyan University, for her of the Last 3000 Years from the Eastern Wells”; Olivier Vanderhaeghe, University project “Equatorial Pacific Deep-sea Ben- Canadian Arctic and Iceland Based on of Minnesota, “The Role of Partial Melting thic Foraminifera: Faunal Composition Lake Sediment Records and Palynology”; during the Late-Orogenic Collapse: The and Diversity Over the Last 450 Kyr.” Mihai N. Ducea, California Institute of Shuswap Metamorphic Core Complex, Eligibility for both Cole awards is Technology, “Probing the Roots of British Columbia, Canada”; Amy M. Wad- restricted to GSA Members and Fellows Batholiths; Lower Crustal Xenoliths from dell, University of Montana, “The Incep- between 30 and 65 years of age. the Sierra Nevada”; Katrina Jane Edwards, tion of the Purcell Anticlinorium in Rela- University of Wisconsin—Madison, tionship to Provenance and Paleocurrent STUDENT AWARDS “Microbial Diversity and Mineral-Microbe Analysis of the Upper Cretaceous Virgelle This year, proposals were received Interactions in Acid Mine Drainage and Golden Spike Formations”; Chris from 534 students, of which 218 (41%) Environments”; Laurent Godin, Carleton Willoughby, University of Nevada, Reno, were awarded grants. Of these recipients, University, “Deformation History and “Range Front Faulting on the West Side 94 were master’s candidates, and 124 were Geochronology of the Hanging Wall of the Stillwater Range, West-Central doctoral candidates. Proposal requests Structures of the Annapurna Detachment Nevada”; Nicholas S. F. Wilson, Dalhousie totaled $988,435, an average of $1,851. Fault, Kali Gandaki Valley, Central Nepal University, “Sulfide Formation Related to The average actual award was $1,604. Himalaya”; Martin F. Helmke, Iowa State the Bacterial Degradation of Petroleum The committee determined that an University, “Determination of Hydraulic Reservoirs.” additional 52 proposals were worthy of Conductivity and Effective Fracture support. An additional $80,000 would Porosity in Till from Large-Diameter, Gretchen L. Blechschmidt have been required to fund these propos- Undisturbed Core Samples”; Mark A. Research Award. The fund established als at an appropriate level. If these addi- Hemphill-Haley, University of Oregon, in memory of Gretchen Louise Blech- tional proposals had been funded, the “Investigation of Geometry, Mode of Dis- schmidt is to support research for women funding rate would have risen to 51%. placement and Activity of Faults Within in the geological sciences. This year’s Twenty alternate candidates were the Cascadia Back-Arc Region of Central award recipient is Heather M. Stoll, Prince- selected by the committee in the event Oregon”; Jeffrey R. Knott, University of ton University, for her project “Rapid Sea that some of the grantees return all or part California, Riverside, “Cosmogenic Isotope Level Change and Climatic Variability in of their grant funds because they change Dating of a Rock Avalanche Offset by the the Cretaceous: Evidence from Land Sec- their research project or receive funds Death Valley Fault Zone, Black Mountains, tions in Italy.” from another source. Death Valley, California”; Barbara M. Mar- John T. Dillon Alaska Research The Committee’s budget included tiny, Universidad Nacional Autónoma de Award. John Dillon was particularly $125,000 from the Penrose Endowment, México, “Pb Isotopic Compositions of noted for his radiometric dating work in $100,000 from the National Science Foun- Feldspars in Plutonic and Volcanic Rocks the Brooks Range, the results of which dation, $75,000 from the Joseph T. Pardee of Tertiary Age in the State of Oaxaca, have had a major impact on the geologic Memorial, $6,000 from the Second Southern Mexico”; William W. Mont- Century Fund (donations by Unocal and gomery, Western Michigan University, Grants continued on p. 27

26 GSA TODAY, September 1996 Grants continued from p. 26 understanding of this mountain range. The recipient of this award is Michael P. Bunds, University of Utah, for “Permeabil- ity Barriers, Elevated Fluid Pressures and Deformation on the Castle Mountain Congressional Fault, Southern Alaska.” Robert K. Fahnestock Award. Science Fellowship This award honors the memory of Ken Fahnestock, who was a member of the 1997–1998 Committee on Research Grants. It is awarded to the applicant with the best he Geological Society of America the Fellow’s particular area, and a proposal in sediment transport or related T is accepting applications for the strong interest in working on a range aspects of fluvial geomorphology. The 1997–1998 Congressional Science Fel- of public policy problems. 1996 recipient is Gregory Dick, University lowship. The Fellow selected will of California, Santa Cruz, for “Cosmogenic Award spend a year (September 1997– Radionuclide Dating of Fluvial Terraces, The GSA Congressional Science August 1998) in the office of an indi- Wind River, Wyoming.” Fellowship carries with it a $42,000 vidual member of Congress or a con- Lipman Research Award. The stipend, and limited health insurance, Lipman Research Fund is supported by gressional committee for the purpose relocation, and travel allowances. The gifts from the Howard and Jean Lipman of contributing scientific and technical fellowship is funded by GSA and by a Foundation to promote and support stu- expertise to public policy issues and grant from the U.S. Geological Survey. dent research grants in volcanology and gaining firsthand experience with the (Employees of the USGS are ineligible petrology in the western United States and legislative process. The American Asso- to apply for this fellowship. For infor- Alaska. The 1996 recipients are James ciation for the Advancement of Sci- Rogers, University of Oregon, for “The mation about other programs, contact ence conducts an orientation program Explosive/Effusive Transition in Small Sili- AAAS or the Geological Society of to assist the Fellow seeking a congres- cic Eruptions,” and Kurt A. Shoemaker, America.) Miami University, for “Quantification of sional staff position in which he or she the Lithospheric and Sublithospheric Con- can work on major legislative issues. To Apply tributions to Northwestern United States Procedures for application and Basaltic Volcanism.” Criteria detailed requirements are available Bruce L. “Biff” Reed Scholarship The program is open to highly in the geology departments of Award. The Bruce L. “Biff” Reed Scholar- qualified postdoctoral to mid-career most colleges and universities in the ship Award was established to provide earth scientists. Candidates should United States or upon request grants to graduate students pursuing stud- have exceptional competence in some from: Executive Director, Geological ies in the tectonic and magmatic evolu- area of the earth sciences, cognizance Society of America, P.O. Box 9140, tion of Alaska and its mineral deposits, and also can fund other geologic work in of a broad range of matters outside Boulder, CO 80301. Alaska. This year’s recipient is David L. DEADLINE FOR RECEIPT OF ALL APPLICATION MATERIALS IS FEBRUARY 1, 1997 Taylor, University of Alabama, for “Sm/Nd Garnet Ages and Thermobarometric Anal- ysis of Mid-Cretaceous Metamorphism, Central SE Alaska.” Reusch, University of Maine, for “Have housie University, for “Sulfide Formation Alexander Sisson Research Arc-Continent Collisions Cooled the Related to the Bacterial Degradation of Award. Family members of Alexander Sis- Earth? Exhumation of New Guinea, Petroleum Reservoirs.” son established a fund in his memory in 187Os/186Os–87Sr/86Sr–P CO Links, and Other Successful Applicants. 1994 to promote and support research for 2 Miocene Climate.” Other applicants recommended for fund- students pursuing studies in Alaska and Industrial Donations and ing are the following: the Caribbean. The first recipient of the Awards. Industrial donations this year Christon Mark Achong, Rhonda award was named this year. He is Kurt R. amounted to $7,000 ($2,000 from Mobil Adkins, Brian Altheim, Rachel A. Ames, Yuengling, University of Alaska, for Oil Corporation, and $5,000 from Unocal Lorin Jean Amidon, Christopher L. “Determination of Ages and Formation Corporation). The 1996 recipients are: Andronicos, Anthony Arendt, Janice Rates of Alaskan Tors: An Exposure History Sean T. Brennan, University of Kansas, for Lynne Arnett, Audrey Aronowsky, Sherif Study Using 26Al/10Be.” “Fluid Migration History of an Exhumed A. M. Awadallah, Brian J. Axsmith, Car- Harold T. Stearns Fellowship Petroleum Reservoir, the Abra Limestone olyn A. Bachl, Laura Ann Banfield, Huim- Award. The recipients of this award, for (Mid-Cretaceous), Northeastern Mexico”; ing Bao, Rebecca L. Beavers, Kathleen research on aspects of the geology of the Elias Gomez, Cornell University, for “A Counter Benison, Deborah Bergfeld, Mairi Pacific Islands and the circum-Pacific Quantitative Approach to the Tertiary M. R. Best, Glenn Bixler, Jodi K. Blakely, region are: Barbara M. Martiny, Universi- Tectono-Stratigraphic Development of the David M. Borrok, John F. Bratton, Nancy dad Nacional Autónoma de México, “Pb Middle Magdalena Basin and Adjacent Ann Brauer, Kitty Alicia Brown, Volker Isotopic Compositions of Feldspars in Plu- Foothills of the Eastern and Central Bruchert, David A. Burch, James R. Burke, tonic and Volcanic Rocks of Tertiary Age Cordilleras in Colombia”; Eric Mueller, Rion H. Camerlo, Barry I. Cameron, David in the State of Oaxaca, Southern Mexico”; University of Oklahoma, for “The Tertiary C. Campbell, Matthew R. Campbell, Peter William Reiners, University of Wash- Petroleum System of the Uinta Basin, Jonathan M. Castro, Phillip L. Chaney, ington, for “Critical Test of Melt Migration Utah, USA—Characterization and Migra- Shawn Chartrand, David G. Coler, John Models from Sequences of Alkali Basalts tion of Hydrocarbons in a Lacustrine Basin Erupted from Monogenetic Volcanic Setting”; and Nicholas S. F. Wilson, Dal- Vents, Kauai, Hawaii,” and Douglas Grants continued on p. 29

GSA TODAY, September 1996 27 The Geological Society of America VOLUME 24 NO. 9 P. 769Ð864 SEPTEMBER 1996 Volume 108, Number 9, September 1996

771 Formation of oceanic crust at slow spreading rates: New constraints from CONTENTS an extinct spreading center in the Labrador Sea K. E. Louden, J. C. Osler, S. P. Srivastava, C. E. Keen 1073Ð1088 Integrated high-precision analyses of Holocene relative sea-level changes: Lessons from the coast of Maine 775 Rapid sea-level changes at the close of the last interglacial (substage 5e) recorded in Bahamian island geology W. Roland Gehrels, Daniel F. Belknap, and Joseph T. Kelley A. Conrad Neumann, Paul J. Hearty 1089Ð1107 Channel-floodplain geomorphology along the Solimões-Amazon 779 Mjolnir structure: An impact crater in the Barents Sea River, Brazil Henning Dypvik, Steinar T. Gudlaugsson, Filippos Tsikalas, Moses Attrep Jr., Leal A. K. Mertes, Thomas Dunne, and Luiz A. Martinelli Ray E. Ferrell Jr., David H. Krinsley, Atle Mork, Jan Inge Faleide, Jeno Nagy 783 Paleocene to Holocene paleodeltas of ancestral Colorado River offset by 1108Ð1119 Isotopic evidence for carbonate cementation and recrystallization, and for the San Andreas fault system, southern California tectonic expulsion of fluids into the Western Canada Sedimentary Basin Jeffrey L. Howard H. G. Machel, P. A. Cavell, and K. S. Patey 787 Role of microbial mats in the fossilization of soft tissues Philip R. Wilby, Derek E. G. Briggs, Paul Bernier, Christian Gaillard 1120Ð1133 Kinematics of Jurassic rifting, mantle exhumation, and passive-margin formation in the Austroalpine and Penninic nappes (eastern Switzerland) 791 3.2 b.y. of organic compound formation near sea-floor hot springs Nikolaus Froitzheim and Gianreto Manatschal Cornel E. J. de Ronde, Thomas W. Ebbesen 795 High paleogeothermal gradient with ridge subduction beneath the 1134Ð1148 Changes in the magnitude and frequency of late Holocene monsoon Cretaceous Shimanto accretionary prism, southwest Japan floods on the Narmada River, central India Arito Sakaguchi Lisa L. Ely, Yehouda Enzel, Victor R. Baker, Vishwas S. Kale, and 799 Widespread venting of methane-rich fluids in Late Cretaceous Sheila Mishra (Campanian) submarine springs (Tepee Buttes), Western Interior seaway, U.S.A. 1149Ð1166 Tectonic evolution of Paleoproterozoic rocks in the Grand Canyon: Erle G. Kauffman, Michael A. Arthur, Brigitte Howe, Peter A. Scholle Insights into middle-crustal processes 803 Long-lived oceanic transform boundaries formed above mantle Bradley R. Ilg, Karl E. Karlstrom, David P. Hawkins, and Michael L. thermal minima Williams Enrico Bonatti 1167Ð1181 U-Pb geochronologic constraints on the Paleoproterozoic crustal evo- 807 En echelon patterns of Calyptogena colonies in the Japan Trench lution of the Upper Granite Gorge, Grand Canyon, Arizona Yujiro Ogawa, Kantaro Fujioka, Katsunori Fujikura, Yo Iwabuchi David P. Hawkins, Samuel A. Bowring, Bradley R. Ilg, Karl E. Karl- 811 Detachment and steep normal faulting in Atlantic oceanic crust west strom, and Michael L. Williams of Africa T. J. Reston, O. Ruoff, J. H. McBride, C. R. Ranero, R. S. White Earthquake recurrence and glacial loading in western Washington 1182Ð1191 815 Long-term faunal stasis without evolutionary coordination: Jurassic Robert M. Thorson benthic marine paleocommunities, Western Interior, United States Carol M. Tang, David J. Bottjer 1192Ð1196 Middle-Late Cretaceous climate of the southern high latitudes: Stable isotopic evidence for minimal equator-to-pole thermal 819 Foredeep tectonics and carbonate platform dynamics in the Huon Gulf, Papua New Guinea gradients: Discussion and reply Joseph Galewsky, Eli A. Silver, Christina D. Gallup, R. L. Edwards, Donald C. Potts Discussion: G. D. Price, B. W. Sellwood, and D. Pirrie Reply: Brian T. Huber and David A. Hodell 823 Mono-sample Pb-Pb dating of pyrrhotite and tourmaline: Proterozoic vs. Archean intracratonic gold mineralization in Zimbabwe 1197Ð1198 Guidelines for authors of papers submitted to the Geological Society of R. Frei, T. Pettke America Bulletin. Part 2 827 Magnitude and timing of episodic sea-level rise during the last deglaciation Stanley D. Locker, Albert C. Hine, Lenore P. Tedesco, Eugene A. Shinn 831 High-resolution 87Sr/86Sr chemostratigraphy of the Silurian: Implications for event correlation and strontium flux 1996 Penrose Conferences Stephen C. Ruppel, Eric W. James, James E. Barrick, Godfrey Nowlan, T. T. Uyeno October 1996 835 Newly discovered Paleogene deltaic sequence in Katawaz basin, October 8–14, Exhumation Processes: Normal Faulting, Ductile Pakistan, and its tectonic implications Mazhar Qayyum, Alan R. Niem, Robert D. Lawrence Flow, and Erosion, Island of Crete. Information: Uwe Ring, Institut für Geowissenschaften, Universität Mainz, Becherweg 21, D-55099 Mainz, 839 Tectonic assembly of inverted metamorphic sequences Germany, 49-6131-392164, fax 49-6131-394769, E-mail: [email protected]. R. A. Jamieson, C. Beaumont, J. Hamilton, P. Fullsack unimainz.de. 843 Porosity corrections for smectite-rich sediments: Impact on studies of compaction, fluid generation, and tectonic history 1997 Penrose Conferences Kevin M. Brown, Barbara Ransom April 1997 847 Mineralization of soft-bodied invertebrates in a Jurassic metalliferous deposit April 24–30, Paleocene-Eocene Boundary Events in Time and Space, Philip R. Wilby, Derek E. G. Briggs, Bernard Riou Albuquerque, New Mexico. Information: Spencer Lucas, New Mexico Museum of Natural History, 1801 Mountain Road NW, Albuquerque, 851 New constraints on the Slate Islands impact structure, Ontario, Canada NM 87104, (505) 841-2873, fax 505-841-2866, E-mail: lucas@ Virgil L. Sharpton, Burkhard O. Dressler, Robert R. Herrick, Bernie Schnieders, John Scott darwin.nmmnh-abq.mus.nm.us. For more information, see 855 Late Pleistocene charcoal in tropical Atlantic deep-sea sediments: http://www.nmt.edu/~haneberg/Fluids. html. Climatic and geochemical significance David J. Verardo, William F. Ruddiman September 1997 September 10–15, Faults and Subsurface Fluid Flow: Fundamentals Forum and Applications to Hydrogeology and Petroleum Geology, 858 Collapse of southwestern North America and the evolution of early Albuquerque and Taos, New Mexico. Information: William C. Haneberg, Miocene detachment faults, metamorphic core complexes, the Sierra Nevada orocline, and the San Andreas fault system New Mexico Bureau of Mines and Mineral Resources, New Mexico Institute Comment: Allen F. Glazner, John M. Bartley, Raymond V. Ingersoll of Mining and Technology, 2808 Central Ave., SE, Albuquerque, NM Reply: Roy K. Dokka, Timothy M. Ross 87106, (505) 262-2774, fax 505-255-5253, E-mail: haneberg@mailhost. nmt.edu. 860 Sizing up the sub-Tommotian unconformity in Siberia Comment: Ed Landing September 23–28, Tectonics of Continental Interiors, Cedar City, Reply: Andrew H. Knoll, Alan J. Kaufman, Mikhail A. Semikhatov, John P. Grotzinger, Utah. Information: Michael Hamburger, Department of Geological William Adams Sciences, Indiana University, Bloomington, IN 47405, (812) 855-2934, 862 Kinematics of retreating subduction along the Carpathian arc, Romania fax 812-855-7899, E-mail:[email protected]. Comment: Dinu Pana, Philippe Erdmer Reply: Hans-Gert Linzer

28 GSA TODAY, September 1996 UK, phone 44-171-3877050, fax 44-171-3887614, CALENDAR E-mail: [email protected]. June 29–July 2, 36th U.S. Rock Mechanics Only new or changed information is being published in GSA Today. A complete listing can be Symposium, New York, New York. Information: found in the Calendar section on the Internet: http://www.geosociety.org. Kunsoo Kim, Columbia University, Mail Code 4711, 500 West 120th St., New York, NY 10027, (212) 854-8337, fax 212-854-8362, E-mail: kk21@ 1996 Meetings 702740, Tulsa, OK 74170-2740, (918)493-3516, columbia.edu, Web: http://www.columbia. fax 918-493-2074. September edu/~kk21. (Abstracts deadline: October 1, 1996.) September 12–14, Arizona Hydrological Society 1997 Meetings September 9th Annual Symposium, Prescott, Arizona. September 9–14, Alaska/Yukon Gold Rush Information: Abe Springer, (520)523-7198, March Centennial Symposium on Mining, Fairbanks, E-mail: [email protected]. March 23–26, Symposium on the Application Alaska. Information: William R. Wood, Festival Fair- of Geophysics to Environmental and Engi- October banks, 514 Second Ave., Suite 102, Fairbanks, AK neering Problems (SAGEEP) 10th Annual Sympo- 99701, (907)456-1984, fax 907-452-8878. October 21–24, Contaminated Soils 11th Annual sium, Reno, Nevada. Information: Jayne Sturges, Conference, Amherst, Massachusetts. Information: (303)771-2000, fax 303-843-6232. September 27–October 5, Association of Engi- Linda Rosen, Environmental Health and Sciences, neering Geologists Annual Meeting, Portland, N344 Morrill, University of Massachusetts, Amherst, June Oregon. Information: Gary Peterson, Squire Assocs., MA 01003, (413)545-2934, fax 413-545-4692. June 9–13, Changing Water Regimes in P.O. Box 1317, Lake Oswego, OR 97035, Drylands, Lake Tahoe, California. Information: October 29–November 2, Mineral Raw Resources (503)635-4419, fax 503-635-1430, E-mail: Nicholas Lancaster, Desert Research Institute, P.O. [email protected]. of the CIS, St. Petersburg, Russia. Information: Min- Box 60220, Reno, NV 89506, E-mail: nick@maxey. erals, P.O. Box 215, 199004, St. Petersburg, Russia, dri.edu, Web: http://www.dri.edu. October U.S. phone (812) 355-7952 or 218-927, fax 812- October 7–11, American Institute of Professional 112-2348 or 213-5926, E-mail: [email protected], June 18–19, Coastal Tectonics, London, UK. Infor- Geologists Annual Meeting, Houston, Texas. Infor- Web: http://www.spb.su/restec. mation: Iain Stewart, Dept. of Geography & Earth mation: AIPG, 7828 Vance Dr., Suite 103, Arvada, CO Sciences, Brunel University, Borough Rd., Isleworth 80003, (303)431-0831, fax 303-431-1332. November TW7 5DU, UK, phone 44-181-8910121, fax 44-181- November 10–15, Society of Exploration 8918237, E-mail: [email protected]; or Clau- Geophysicists Annual Meeting, Denver, Send notices of meetings of general interest, in format dio Vita-Finzi, Dept. of Geological Sciences, Univer- above, to Editor, GSA Today, P.O. Box 9140, Boulder, Colorado. Information: F. Don Stoddard, Box sity College London, Gower St., London WC1E 6BT, CO 80301, E-mail: [email protected].

Grants continued from p. 27 Kumar Muhuri, Mandy Munro, Keenan Small, Joshua B. Smith, Daniel A. Stephen, Murray, MaryLynn Musgrove, Beth M. Joshua Benjamin Sternberg, Richard E. Comstock, Luke Copland, Christopher Nadeau, Katrina Dawn Nell, Maria Nier- Stotts, Margaret Streepey, Jennifer A. Scott Cornish, Erich Cowgill, Andrea mann, Richard D. Pancost, Michael B. Par- Telford, Michael P. Terry, Dennis O. Terry, Cozzi, Walter Cressler, Lisa R. Danielson, sons, Jon R. Philipp, Thomas Pichler, Jr., Paul A. Thomas, Kathy Goetz Troost, Caroline P. Davies, Rhawn F. Denniston, Aaron Jeffrey Pietruszka, Oleg V. Pinous, Benjamin F. Turner, Robert B. Valentine, Daniel M. Deocampo, Jeffrey A. Dorale, Paul David Pittman, Susanne Porterfield, Ginger Leigh Vaughn, Tim F. Wawrzyniec, Neal A. Doran, Jack Eggleston, Todd Alan Christine Jennifer Potts, Pamela Price, James W. Webster, Peter W. Welch, Timo- Ehlers, James C. Ely, Annette Summers Maria G. Prokopenko, Benjamin Pursell, thy Nash Whalen, Timothy S. White, Engel, Jeremy W. Eschelbacher, Jack Evans, David W. Ramsey, Kent Ratajeski, Eduard Kathleen Williamson, Matthew G. Wilson, Rebecca L. A. Everman, Holly Annette G. Reinhardt, Thomas Harold Reppe, Robert Carleton Witter, Jeffrey B. Witter, Ewing, Allen H. Fetter, Donald A. Friend, Bradley D. Ritts, Paul S. Rodusky, David B. Paul M. Wolfe, Wayne R. Wright, Feng Robert Riepma Gaines, Rebecca D. Gard- Saja, Dibyendu Sarkar, Keegan Schmidt, Xue, Haitao Yang, Matt A. Yeager, Cornelia ner, Jennifer M. Garrison, Paul Gibson, Matthew W. Schmidt, Saxon E. Sharpe, M. Yoder, Aaron S. Yoshinobu, Darla Karen Carrie Elizabeth Gilliam, Ethan Adams Mary C. Simmons, Mercedes R. Sink, Zeleneitsky, Donggao Zhao. ■ Goddard, Arturo Gomez-Tuena, Caitlin Naomi J. Sinor, Raymond L. Skelly, Eric E. Gorman, Pierre Goubet, Jonas P. Gournay, Lisa Greer, Joe D. Gregson, Matthias Grobe, Armand Rossini Groffman, Lyn Gualtieri, Katharine A. Guiles, James W. Hagadorn, Donald L. Hall, Mark A. Hanan, Christina N. Hansen, Kristi Lind Hanson, Michael J. Harrison, Craig W. Harvey, Erik W. Harvey, Christopher A. Hedlund, Mar- Contributions to GSA If you wish to support this tin F. Hilfinger, Christopher J. Hook, Foundation’s Dwornik activity, please send your Kathryn Hoppe, Brian Horton, Kevin M. Fund will allow continua- contribution to Howard, Robert B. Hughes, John P. Hunter, Esin Esra Inan, Michael L. Incze, Carlos tion of this valuable means GSA Foundation Ð Jaramillo, Robert Johnston, Thomas J. of encouraging and Dwornik Planetary Kalakay, Stephen D. Keane, Michael X. motivating Geoscience Fund Kirby, Susannah Kitchens, Joseph R. Krieg, Evelyn Krull, Bonnie Kubit, Stephen bright young P.O. Box 9140 Christopher Kuehn, Mark Alan Kulp, scientists. Boulder, CO Andrew C. Kurtz, Laura Rosales Lagarde, 80301 Terry D. Lahm, David C. Latterman, Christoph Lehmann, David R. Lemons, Joseph M. Licciardi, Robert E. Locklair, Laura C. Lozano-Velazquez, Guoping Lu, Christine L. Luther, David M. Manaker, Bryan G. Mark, Mylene L. Martinez, Erik B. Melchiorre, Stephen J. Mojzsis, Patricio I. Moreno, Galina S. Morozova, Sankar

GSA TODAY, September 1996 29 CLASSIFIED ADVERTISING

Published on the 1st of the month of issue. Ads (or can- Positions Open are inductively coupled plasma spectroscopy (ICP), high- cellations) must reach the GSA Advertising office one performance gas chromatograph, and equipment for month prior. Contact Advertising Department (303) GEOCHEMISTRY organic carbon analysis at the University of Missouri Envi- 447-2020, 1-800-472-1988, fax 303-447-1133, or The Department of Geology and Geophysics at the Uni- ronmental Trace Substances Laboratory, and modern X- E-mail:[email protected]. Please include com- versity of Missouri-Rolla (UMR) invites applications for an ray diffraction and electron microbeam equipment (SEM- plete address, phone number, and E-mail address with all entry-level, tenure-track position in geochemistry. Appli- EDS and WDS, TEM, and AES, ESCA, STM, and AFM) at the Center for Materials Research and within the School correspondence. cants must have completed a Ph.D. degree before the of Mines and Metallurgy. Per line effective starting date of January 1, 1997 (or September 1, Starting salary and rank are commensurate with 1997 depending on the candidate’s availability). The suc- Per Line for each research record and experience. cessful candidate will be expected to teach undergraduate for addt'l month Applications, accompanied by a resume, statement of and graduate courses in introductory, applied, and aque- Classification 1st month (same ad) research interests, and complete bibliography references ous geochemistry, with emphasis on the geochemistry of Situations Wanted $1.75 $1.40 should be sent to: Dr. Richard Hagni, Chairman, Univer- groundwater and other environmental problems. In addi- Positions Open $6.50 $5.50 sity of MO-Rolla, Department of Geology and Geophysics, tion, the applicant will be expected to develop a strong Consultants $6.50 $5.50 125 McNutt Hall, Rolla, MO 65409-0410; Phone: 573-341- research program, and direct graduate research (M.S. and Services & Supplies $6.50 $5.50 4616; fax: 573-341-6935; E-mail: [email protected] Ph.D. level) in geochemistry. Although the areas of geo- Opportunities for Students Three letters of reference should also be sent directly chemical emphasis will be groundwater and environmen- first 25 lines $0.00 $2.35 to Dr. Hagni. tal problems, expertise and interest in applications of geo- additional lines $1.35 $2.35 Application deadline: To ensure consideration, applica- chemistry to sedimentology, petroleum, and ore deposits Code number: $2.75 extra tions and letters of reference must arrive before Novem- will be considered a plus. ber 1, 1996, but we will continue to accept applications The department is moderate in size and is closely Agencies and organizations may submit purchase order or until the position is filled. associated with five other mineral industries departments payment with copy. Individuals must send prepayment The University of Missouri-Rolla is an equal opportunity, with copy. To estimate cost, count 54 characters per line, in the new nearly 20 million dollar McNutt Hall. The affirmative-action employer. including all punctuation and blank spaces. Actual cost department collaborates with the regional United States may differ if you use capitals, centered copy, or special Geological Survey (groundwater and topographic divi- The Department of Marine Science of the University of characters. sions) and Missouri Geological Survey offices that are South Florida, St. Petersburg, FL invites applications for located in Rolla, Missouri. The department works closely a Visiting Assistant Professor (duration nine months) To answer coded ads, use this address: Code # ----, with the Department of Geological Engineering, which is which will include the spring and summer semesters of GSA Advertising Dept., P.O. Box 9140, Boulder, CO strongly oriented toward environmental problems. 1997. A Ph.D. with an emphasis in Geological Oceanogra- 80301-9140. All coded mail will be forwarded within The department maintains computer-automated atomic phy or Marine Geochemistry is required. A successful 24 hours of arrival at GSA Today office. absorption equipment in spacious teaching and research candidate’s research record must emphasize work in low laboratory facilities. Also available on the UMR campus temperature sedimentary geochemistry including observa-

GSA MEETINGS

1997 ANNUAL MEETING 1997 SECTION MEETINGS Salt Lake City, Utah NORTHEASTERN SECTION, March 17–19, Sheraton Valley October 20–23 Forge Hotel, King of Prussia, Pennsylvania. Submit completed abstracts to: Allan M. Thompson, Department of Geology, Salt Palace Convention Center University of Delaware, Newark, DE 19716-2541, (302) 831-2585, Little America Hotel [email protected]. Abstract Deadline: November 12, 1996. General Chair: M. Lee Allison, Utah Geological Survey SOUTH-CENTRAL and ROCKY MOUNTAIN SECTIONS, Technical Program Chairs: John Bartley, Erich Petersen, March 20–21, University of Texas, El Paso, Texas. Submit completed University of Utah abstracts to: Elizabeth Y. Anthony, Department of Geological Sci- Field Trip Chairs: Bart Kowallis, Brigham Young University ences, University of Texas, El Paso, TX 79968-0555, (915) 747-5483, Paul Link, Idaho State University [email protected]. Abstract Deadline: November 25, 1996. SOUTHEASTERN SECTION, March 27–28, Auburn University, Auburn, Alabama. Submit completed abstracts to: Charles E. Savrda, CALL FOR Department of Geology, Auburn University, Auburn, AL 36849-5305, 1997 CONTINUING EDUCATION COURSE (334) 844-4893, [email protected]. Abstract Deadline: December 2, 1996. ROPOSALS P NORTH-CENTRAL SECTION, May 1–2, The Concourse Hotel, Proposals Due by December 1 Madison, Wisconsin. Submit completed abstracts to: Bruce Brown, The GSA Committee on Continuing Education invites those Wisconsin Geological & Natural History Survey, 3817 Mineral Point interested in proposing a GSA-sponsored or cosponsored course Rd., Madison, WI 53705, (608) 263-3201, babrown1@facstaff. or workshop to contact GSA headquarters for proposal guidelines. wisc.edu. Abstract Deadline: January 9, 1997. Continuing Education courses may be conducted in conjunction CORDILLERAN SECTION, May 21–23, Kona Surf Resort with all GSA annual or section meetings. We are particularly and Convention Center, Kailua-Kona, Hawaii. Submit completed interested in receiving proposals for the 1997 Salt Lake City abstracts to: Fred MacKenzie, Department of Oceanography, Annual Meeting or the 1998 Toronto Annual Meeting. University of Hawaii–SOEST, 1000 Pope Road, Honolulu, HI 96822, Proposals must be received by December 1, 1996. Selection (808) 956-6344, [email protected]. Abstract Deadline: of courses for 1997 will be made by February 1, 1997. For those January 24, 1997. planning ahead, we will also consider courses for 1998 at that time.

For proposal guidelines or information, contact: FOR INFORMATION ON ANY GSA MEETING CALL THE GSA MEETINGS Edna Collis, Continuing Education Coordinator, DEPARTMENT 1-800-472-1988 or (303) 447-2020, ext. 133 GSA headquarters 1-800-472-1988, ext. 134. E-mail: [email protected] or see GSA’s E-mail: [email protected] World Wide Web page at http://www.geosociety.org

30 GSA TODAY, September 1996 tional field programs. The incumbent is expected to teach Geology, Bowling Green State University, Bowling Green, The University of Missouri-Rolla is an equal opportunity, a graduate level course on the Geochemistry of Marine OH 43403. Bowling Green is an AA/EOC employer. Appli- affirmative action employer. Sediments. Pending availability of funds, the Department cations from underrepresented/protected groups are of Marine Science plans to advertise for a candidate to urged to apply. STRATIGRAPHY / BASIN ANALYSIS fill a permanent position of similar description beginning The Department of Geological Sciences of Rutgers, The in 1998. SURFICIAL PROCESS GEOMORPHOLOGIST State University of New Jersey (New Brunswick) seeks to Salary range: $35,000 — negotiable. The Conservation and Survey Division, University of fill an anticipated tenure-track position at the Assistant Applicants should submit a resume with career objec- Nebraska-Lincoln, invites applications for an Assistant Professor level in the field of Stratigraphy and Basin Anal- tives, a list of publications and accomplishments and Professor, 12-month, tenure-track appointment. Will ysis beginning in September 1997. Exceptionally accom- names and phone numbers of three references to Dr. develop and implement research with respect to surficial plished applicants at more senior levels will be considered. Robert H. Byrne, Faculty Recruiting Chair, Department of processes and their stratigraphic record in the Quaternary We seek candidates with proven research capability in Marine Science, University of South Florida, 140 Seventh of Nebraska, emphasizing some combination of glacial, integrating geochemical, geophysical, and stratigraphic Avenue South, St. Petersburg, Florida 33701. fluvial and/or eolian processes and utilizing field data col- data. While the subdiscipline is open, we desire expertise Deadline Date: 9/6/96 lection, remote sensing and geographic information sys- in isotopic stratigraphy, magnetostratigraphy, biostratigra- USF is an EO/EA/AA institution. For ADA accommoda- tems (GIS). Grant sponsored research in continental inte- phy, or cyclostratigraphy to complement current faculty tions, call (813) 893-9508. rior outside Nebraska will also be encouraged. Will be strengths. The successful candidate should interact with expected to provide expertise/service to members of the ongoing regional and inter-regional studies; these include VASSAR COLLEGE public and private sectors; develop linkages with scientists current projects on the rift, passive margin, and foreland The Department of Geology and Geography at Vassar within CSD, UNL, and other institutions; obtain external, basins represented in the New Jersey region and their College is searching for a dynamic, broadly-thinking earth grant sponsored funding; present research at conferences global counterparts. Our goal is to establish and maintain scientist for an assistant professor tenure-track position and symposia; and publish research in scholarly journals, a gas mass spectrometry or magnetostratigraphy/multi- beginning August, 1997. A Ph.D. is required for hiring at CSD publications and other outlets. Will have the opportu- sensor track laboratory in collaboration with the new fac- the assistant professor level, although candidates will be nity to participate in workshop instruction, classroom ulty member. In addition to developing an innovative, for- considered at the instructor level if they are Ph.D. candi- teaching, and advising graduate students in allied depart- ward-looking research program, a solid commitment to dates or the Ph.D. is pending. As an assistant professor or ments when feasible and desirable. Requires Ph.D. in undergraduate and graduate teaching is required. instructor, this individual will teach two geology courses geology, physical geography, soil science or closely A curriculum vitae, statement of research interests, and each semester. The four courses will include structural related field earned by the date of appointment, and expe- the names of four references should be sent by 15 geology and an introductory course whose focus will rience with remote sensing and GIS. Applicant should November, 1996 to Dr. Kenneth G. Miller, Chair of the depend on the individual’s expertise and interests. The have an appreciation for environmental concerns and Search Committee, Department of Geological Sciences, other two courses, one of which must be taught at the appropriate use of natural resources. Send curriculum Rutgers University, Piscataway, NJ 08855-1179. Rutgers senior level, could be in the fields such as geomorphol- vitae, university transcripts, description of current and University is an equal opportunity/affirmative action ogy, tectonics, engineering geology, hazards or remote planned future research, and the names, addresses and employer. sensing. We are particularly eager to find an earth scien- telephone numbers of three references postmarked by tist who 1) works at the intersection of surface processes December 31, 1996 (or until suitable candidate is found) HYDROLOGY / HYDROGEOLOGY and tectonics, 2) appreciates the importance of doing sci- to: Dr. F. Edwin Harvey, Chair, Geomorphologist Search DARTMOUTH COLLEGE ence which is relevant to society; 3) perceives the advan- Committee, Conservation and Survey Division, University The Earth Sciences Department at Dartmouth College tages of a department that knits together geology and of Nebraska-Lincoln, 113 Nebraska Hall, Lincoln, NE seeks applications for a tenure-track faculty position in geography; 4) understands the significance of educating a 68588-0517.Telephone: (402) 472-8237; fax: (402) 472- hydrology/hydrogeology at the assistant professor level. diverse scientific work force for the 21st century; 5) will 2410; or E-mail: [email protected]. UNL is com- Exceptional candidates may be considered for appoint- develop an active research program that involves under- mitted to a pluralistic campus community through Affirma- ment at a higher level. Candidates will be expected to dis- graduate students; and 6) will employ creative approaches tive Action and Equal Opportunity, is responsive to the play excellence and leadership in both teaching and to teaching and emphasize field experiences and studies. needs of dual career couples, and assures reasonable research, establish an active research program, advise Familiarity with tools such as computer modeling, geodet- accommodation under the Americans With Disabilities student research at the undergraduate and graduate lev- ics, GPS, GIS, or laser altimetry would be advantageous. Act. Contact Dr. Harvey for additional information. els, and participate in the interdisciplinary Earth, Ecosys- Vassar College is a private, liberal arts institution of tems and Ecological Sciences graduate program. Applica- approximately 2200 students located in the Mid-Hudson GEOPHYSICS tions are encouraged from individuals in all sub-disciplines River Valley in Poughkeepsie, NY. The Geology and The Department of Geology and Geophysics at the Uni- of hydrology. Geography Department at Vassar involves three geolo- versity of Missouri-Rolla (UMR) invites applications for an A curriculum vitae, list of publications, description of gists and three geographers and utilizes a newly reno- entry-level, tenure-track position in environmental and proposed research and teaching activities, and names, vated building with XRD, sedimentology, rock preparation, engineering geophysics. The successful applicant will be addresses, and FAX numbers of three references should and GIS laboratories. The Patricia Bullitt Collins Field Sta- expected to teach applied and theoretical courses at both be sent to: Hydrology Search Committee, Dartmouth Col- tion on the 500 acre Vassar College farm also functions the undergraduate and graduate levels. In addition, the lege, Department of Earth Sciences, 6105 Fairchild, as an integral element in our geology and environmental applicant will be expected to develop a strong research Hanover, NH 03755. The appointment will be effective sciences programs. Vassar is an affirmative action, equal program and direct graduate students in their areas of July 1, 1997. Evaluation of applications will begin Septem- opportunity employer. Since we will conduct preliminary interest. Applicants must have completed the Ph.D. ber 1, 1996 and continue until the position is filled. job interviews at the annual meeting of the Geological degree or equivalent in science or engineering before the Dartmouth College is an equal opportunity/affirmative Society of America in Denver, Colorado, applications probable appointment date of September 1, 1997. Appli- action employer. Women and minorities are encouraged should be sent by October 21, 1996 to Chair, Search cants with experience in engineering and environmental to apply. Committee, Professor Jill S. Schneiderman, Department applications are especially invited to apply. of Geology and Geography, Maildrop 312, Poughkeepsie, The department is moderate in size and is closely NY 12601. Question? Call 914-437-5540 or fax 914-437- associated with five mineral engineering departments in 7577. the modern and spacious, 145,000 square foot, 20 million Opportunities for Students dollar McNutt Hall. The department has strong ties to the MINERALOGIST / PETROLOGIST regional United States Geological Survey and Missouri JOI/USSAC Ocean Drilling Fellowships. JOI/U.S. Sci- The Department of Geology at Bowling Green State Uni- Geological Survey offices that are located in Rolla, ence Advisory Committee is seeking doctoral candidates versity announces a tenure-track position at the Assistant Missouri. of unusual promise and ability who are enrolled at U.S. Professor level. Fields of expertise and research interests The department maintains state-of-the-art Zonge Engi- institutions to conduct research compatible with that of the should include mineralogy and/or petrology; a component neering resistivity, induced potential and electromagnetic Ocean Drilling Program. Both one-year and two-year fel- of field-based research is highly desirable. The successful equipment, a Bison 24-channel seismograph with bore- lowships are available. The award is $20,000 per year to candidate will teach undergraduate mineralogy and/or hole and roll-a-long capabilities, a GSSI ground-penetrat- be used for stipend, tuition, benefits, research costs, and petrology and other undergraduate and graduate courses ing radar unit with three antennas, a magnetometer and a incidental travel, if any. Applicants are encouraged to pro- in geology, participate in our summer field course in the gravimeter. In support of this equipment, the department pose innovative and imaginative projects. Research may western U.S., maintain an active research program, and has acquired signficant processing, modeling and inter- be directed toward the objectives of a specific leg or to supervise master’s level graduate students. A Ph.D. is pretational computer hardware and software. broader themes. required. Starting salary and rank are commensurate with Proposals and applications for “shorebased research” Facilities include: Microscopy laboratory (transmitted, research record and experience. should be submitted to the JOI office for the following reflecting, cathodoluminescence, and fluid inclusion micro- Applications, accompanied by a resume, statement of deadlines: 11/15/96 and 4/15/97. Shorebased research scopes); Mineral kinetics laboratory (cold-seal hydrother- research interests, and complete bibliography references may be based on any DSDP or ODP leg. The next “ship- mal vessels and one atmosphere furnaces); Geochemistry should be sent to: Dr. Richard Hagni, Chairman, Univer- board research” deadline is 4/15/97 and is for proposals laboratory (XRD; XRF; SEM; AAS); Sample preparation sity of MO-Rolla, Department of Geology and Geophysics, based on future ODP legs 176 to 181. facilities; Field vehicles; Remote sensing laboratory; GIS 125 McNutt Hall, Rolla, MO 65409-0410; Phone: (573) For more information and to receive an application Laboratory; Unix Workstations; ARC/INFO, ERMapper, 341-4616; fax: 573-341-6935; E-mail: [email protected] packet contact: Andrea Johnson, JOI/USSAC Ocean AVS; and Geophysical facilities (magnetometer, gravity Three letters of reference should also be sent directly Drilling Fellowship Program, Joint Oceanographic Institu- meter, shallow seismic, resistivity, GPS). to Dr. Hagni. tions, Inc. 1755 Massachusetts Ave., NW, Suite 800, To assure full consideration, applications including a Application deadline: To ensure consideration, applica- Washington, DC 20036-2102 (Andrea Johnson; Tel: 202- complete resume, statements of teaching and research tions and letters of reference must arrive before January 232-3900, ext. 213; Internet: [email protected]). interests, three original letters of recommendation, and 1, 1997, but we will continue to accept applications until transcript showing highest degree should be sent by the position is filled. November 15 to: Chair, Search Committee, Department of

GSA TODAY, September 1996 31 Geological Society of America ANNUAL MEETING AND EXPOSITION

DENVER, COLORADO • OCTOBER 28–31,1996

Preregistration AVALONIAN AND RELATED PERI-GONDWANAN Pleistocene and by marine and eolian processes since. However, their TERRANES OF THE CIRCUM–NORTH ATLANTIC geological reconstruction of Cape Cod varies from that of Davis: they Due September 20 edited by R. D. Nance and M. D. Thompson, 1996 believe that the glacial lower cape Along the southeastern margin of the Appalachian-Caledonide orogen extended east of its present shore lies a collection of suspect terranes traditionally associated with the for nearly double Davis’s estimate eastern (Avalonian/Gondwanan) margin of the early Paleozoic Iapetus and that it took more than twice the ocean, but which record histories of Neoproterozoic subductions that time Davis estimated to attain its predate the inception of the Iapetus cycle. Recent advances in our present form. Davis also inferred knowledge of these terranes have dramatically improved our that all detritus eroded on the east understanding of Neoproterozoic tectonics and the Paleozoic evolution of side was transported northward to the Appalachian-Caledonian orogen, create the Provincetown Hook, and are proving central to the whereas Uchupi et al. propose that development of continental prior to 9500 years ago this material reconstructions for the critical was transported southward to fill a Precambrian-Cambrian boundary depression at the cape’s elbow; only interval. These advances are the during the past 6500 years was the result of the use of precise zircon material transported northward to geochronology and discriminative form the hook. This work also geochemical and isotopic studies, suggests that historical changes in Cape Cod are not limited to natural the application of sequence processes, as Davis suggested, but that past and present human stratigraphy and faunal analysis to activities, such as construction of harbors and the Cape Cod Canal, sedimentary overstep successions, dredging of channels and mooring areas, devegetation, mining, timber and the interpretation of these data harvesting, clearing of land for agriculture, and unrestricted grazing, have in terms of Neoproterozoic played a significant role in creating continental configurations and peri- the present morphology of Cape Gondwanan paleogeography. This Cod. volume documents these aspects with examples from all parts of the SPE309, 70 p., paperback, belt. ISBN 0-8137-2309-4, List price SPE304, 398 p., indexed, paperback, ISBN 0-8137-2304-3, List price $30.00, Member price: $24.00 $95.00, Member price $76.00 LATE HOLOCENE ALLUVIAL PALEOZOIC SEQUENCE GEOMORPHOLOGY OF THE STRATIGRAPHY: VIEWS FROM VIRGIN RIVER IN THE ZION See June GSA Today THE NORTH AMERICAN NATIONAL PARK AREA, for complete CRATON SOUTHWEST UTAH edited by B. J. Witzke, G. A. Ludvigson, by R. Hereford, G. C. Jacoby, and information on: J. E. Day, 1996 V. A. S. McCord, 1996 • Technical program Modern sequence stratigraphic ideas The Virgin River, in the spectacular evolved in the petroleum industry canyons of Zion National Park near • Continuing Education during the 1970s and 1980s primarily the southwest margin of the Colorado Plateau, is well suited for geo- Courses from seismic investigations of morphic research; it has a relatively wide alluvial valley and is free • Field Trips Mesozoic-Cenozoic strata in basinal flowing, retaining the presettlement discharge regime. The research and continental margin settings. This described in Special Paper 310 focused on how variations of water and • Exhibits volume refocuses on the Paleozoic sediment load modify valley morphology. A specific goal was • Registration cratonic heritage of sequence understanding the timing and causes of arroyo cutting—the catastrophic, • Lodging and Travel stratigraphy, with the additional perspectives from adjoining continental widespread degradation of stream channels in the southwest United margins and foreland basins. Individual contributions evaluate a variety States beginning in the late 1800s. Large-scale surficial geologic maps of stratigraphic, sedimentologic, diagenetic, geochemical, and portray the terraces and alluvial deposits. Dated by archaeologic context paleontological problems within the common theme of sequence and by tree-ring methods, these deposits correlate in time with dated stratigraphy and depositional cycles. The authors adopt or adapt modern late Holocene alluvium of other streams on the southern Colorado For Information sequence stratigraphic concepts to varying degrees, and some examine Plateau. Relocated historic photographs show the channel before, during, GSA Meetings the applicability of standard sequence stratigraphic terminology and and after arroyo cutting. Dendrohydrologic reconstruction of streamflow Department paradigms to their Paleozoic examples. This volume covers topics demonstrates that arroyo cutting occurred during unusually wet climate P.O. Box 9140 spanning the Cambrian through the Permian, and provides a diversity of with large floods and was preceded by an interval of very dry climate. Boulder, CO 80301 views focused within the North American craton. SPE310, 46 p., paperback, ISBN 0-8137-2310-8, List price $25.00, (303) 447-2020 SPE306, 452 p., indexed, ISBN 0-8137-2306-X, List price $115.00, Member price $20.00 (800) 472-1988 Member price $92.00 1 (303) 447-0648 fax Volumes are 8- /2" x 11". Prices include shipping & handling. E-mail: THE LATE QUATERNARY CONSTRUCTION OF CAPE COD, meetings@ MASSACHUSETTS: A RECONSIDERATION OF THE W. M. 1-800-472-1988 • fax 303-447-1133 geosociety.org DAVIS MODEL GSA Publication Sales edited by E. Uchupi, G. S. Giese, D. G. Aubrey, and D.-J. Kim, 1996 P.O. Box 9140, Boulder, CO 80301, 303-447-2020 World Wide The authors of this reconstruction of the geologic history of Cape Cod Web:http://www. and southeast coastal Massachusetts support W. M. Davis’s contention geosociety.org that Cape Cod was formed by glacial deposition during the late