sign in sign up
<<
Home , Craton, Mountain formation, Orogenic belt, Platform (geology)

VVOL.OL. 115,5, NNO.O. 2 A PPUBLICATIONUBLICATION OFOF THETHE GEOLOGICALGEOLOGICAL SOCIETYSOCIETY OFOF AMERICAAMERICA FEBRUARYFEBRUARY 22005005

Subduction zone backarcs, mobile belts, and orogenic heat

Inside: zone backarcs, mobile belts, and orogenic heat, ROY D. HYNDMAN, CLAIRE A. CURRIE, AND STEPHANE P. M AZZOTTI, p. 4 2004–2005 Division Officers and Past Chairs, p. 11 GeoVentures™ 2005, p. 29 An Scientist’s Periodic Table of the Elements and Their Ions

by L. Bruce Railsback

An Earth Scientist’s Periodic Table of the Elements and form as ions rather than in elemental form. The immediate Their Ions is a new periodic table designed to contextualize result is a completely rearranged table in which many trends in geochemistry, mineralogy, aqueous chemistry, elements appear multiple times, because many elements and other natural sciences. First published as an insert assume different charge under different natural conditions. in the September 2003 issue of , this version is The practical result is that many trends in mineralogy, updated and supersized—36" by 76"! seawater chemistry, soil chemistry, the chemistry of This new periodic table of the elements is more useful Earth’s and , the chemistry of sediments, and to earth scientists than the conventional periodic table nutrient chemistry become apparent in ways that are not used by chemists. The periodic table presented here recognizable on conventional, elementally constructed, acknowledges that most natural matter occurs in charged periodic tables.

MCH092F, 1 folded sheet (36" × 76"), 7 p. text $25.00, member price $20.00—folded MCH092R, 1 rolled sheet (36" × 76"), 7 p. text $30.00, member price $24.00—rolled

Order online at: GSA Sales and Service P.O. Box 9140, Boulder, CO 80301-9140 (303) 357-1000, option 3 www.geosociety.org/bookstore 1-888-443-4472 • fax 303-357-1071 Volume 15, Number 2 FEBRUARY 2005

Cover: The Cordillera GSA TODAY publishes news and information for more than mobile belt illustrating the high elevation 18,000 GSA members and subscribing libraries. GSA Today and complex characteristic of hot, lead science articles should present the results of exciting new thin backarc . Backarcs remain research or summarize and synthesize important problems weak enough to be deformed by plate or issues, and they must be understandable to all in the earth margin forces for long geological periods. science community. Submit manuscripts to science editors Keith A. Howard, [email protected], or Gerald M. Ross, Right: Heat flow and thermal-tectonic cross [email protected]. section for N. Cascadia backarc illustrating uniform high heat flow and inferred GSA TODAY (ISSN 1052-5173 USPS 0456-530) is published 11 shallow convection. See times per year, monthly, with a combined April/May issue, by The “Subduction zone backarcs, mobile belts, Geological Society of America, Inc., with offices at 3300 Penrose Place, Boulder, Colorado. Mailing address: P.O. Box 9140, and orogenic heat,” by R.D. Hyndman et Boulder, CO 80301-9140, USA. Periodicals postage paid at al., p. 4–10. Boulder, Colorado, and at additional mailing offices. Postmaster: Send address changes to GSA Today, GSA Sales and Service, P.O. Box 9140, Boulder, CO 80301-9140. Copyright © 2005, The Geological Society of America, Inc. (GSA). All rights reserved. Copyright not claimed on content prepared SCIENCE ARTICLE wholly by U.S. government employees within scope of their employment. Individual scientists are hereby granted permission, 4 Subduction zone backarcs, mobile belts, and orogenic heat, without fees or further requests to GSA, to use a single figure, a single table, and/or a brief paragraph of text in other subsequent ROY D. HYNDMAN, CLAIRE A. CURRIE, AND STEPHANE P. MAZZOTTI works and to make unlimited photocopies of items in this journal for noncommercial use in classrooms to further education and science. For any other use, contact Copyright Permissions, GSA, P.O. Box 9140, Boulder, CO 80301-9140, USA, Fax 303- 11 Meeting Wrap-up—Denver 2004: Geoscience in a Changing World 357-1073, [email protected]; reference GSA Today, ISSN 1052-5173. Permission is granted to authors to post the abstracts only of their articles on their own or their organization’s Web site 11 2004–2005 Division Officers and Past Chairs providing the posting includes this reference: “The full paper was published in the Geological Society of America’s journal GSA 2004 GSA Medals and Awards Today, [include year, month, and page numbers if known, where 12 the article will appear].” GSA provides this and other forums for the presentation of diverse opinions and positions by scientists 13 2004 Honorary Fellows worldwide, regardless of their race, citizenship, gender, religion, or political viewpoint. Opinions presented in this publication do not reflect official positions of the Society. 13 2004 GSA Division Awards SUBSCRIPTIONS for 2005 calendar year: Society Members: GSA Today is provided as part of membership dues. Contact 15 Call for Nominations: Fourteenth Annual Biggs Award for GSA Sales and Service at 1-888-443-4472, (303) 357-1000, Excellence in Earth Science Teaching for Beginning Professors option 3, or [email protected] for membership information. Nonmembers & Institutions: Free with paid subscription to both GSA Bulletin and Geology, otherwise 15 Mann Mentor Programs—Careers in Hydrogeology and $75. Contact Subscription Services at (800) 627-0629 or Hydrology [email protected]. Also available on an annual CD-ROM (together with GSA Bulletin, Geology, GSA Data Repository, and an Electronic Retrospective Index to journal articles from 1972); 16 Final Announcement and Call for Papers: North-Central Section $99 to GSA Members, others call GSA Subscription Services for prices and details. Claims: For nonreceipt or for damaged copies, members contact GSA Sales and Service; all others 19 GSA Section Meetings contact Subscription Services. Claims are honored for one year; please allow sufficient delivery time for overseas copies, up to 22 Mentor Programs—Students: Mark your calendars! six months. GSA TODAY STAFF: 23 Final Announcement and Call for Papers: Rocky Section Executive Director: John W. Hess Science Editors: Keith A. Howard, U.S. Geological Survey, MS 919, Menlo Park, CA 94025, USA, [email protected]; 28 Upcoming Deadlines and Gerald M. Ross, Kupa’a Farm, Box 458, Kula, HI 96790, [email protected]. GeoCorps™ America—Summer application deadline is just days away! Director of Publications: Jon Olsen 28 Managing Editor: Kristen E. Asmus, [email protected] Editorial Staff: Matt Hudson 29 GeoVentures™ 2005—; New Zealand; Montana, USA; and Production Coordinator: Margo Y. Sajban Graphics Production: Margo Y. Sajban Golden, Colorado, USA ADVERTISING: Classifieds & Display: Ann Crawford, 1-800-472-1988, ext. 1053, 32 GSA Foundation Update (303) 357-1053, Fax 303-357-1070; [email protected] GSA ONLINE: www.geosociety.org 33 Announcements Printed in the USA using pure soy inks. 35 Classified Advertising

37 Journal Highlights

50% Total Recovered Fiber 38 GeoMart Geoscience Directory 10% Postconsumer Subduction zone backarcs, mobile belts, and orogenic heat Roy D. Hyndman, Pacific Geoscience Centre, Geological Survey of Canada, P.O. Box 6000, Sidney, British Columbia V8L4B2, Canada, and School of Earth and Ocean Sciences, University of Victoria, Victoria, British Columbia V8W3P6, Canada, [email protected]; Claire A. Currie, School of Earth and Ocean Sciences, University of Victoria, Victoria, British Columbia V8W3P6, Canada; and Stephane P. Mazzotti, Pacific Geoscience Centre, Geological Survey of Canada, P.O. Box 6000, Sidney, British Columbia V8L4B2, Canada

ABSTRACT hot backarc , not from the Two important problems of continental orogenic deformation process itself. tectonics may be resolved by recogniz- INTRODUCTION ing that most subduction zone backarcs The model of with have hot, thin, and weak lithospheres narrow plate boundaries provides an Figure 1. The North America Cordillera mobile over considerable widths. These are (1) excellent first-order description of global the origin of long-lived active “mobile belt. The high elevation and complex current tectonics. Plate tectonics also provides tectonics illustrate the hot, weak, backarc belts” contrasted to the stability of cra- an elegant explanation for orogenic lithosphere deformed by variable margin forces. tons and platforms, and (2) the origin crustal shortening and thickening in of the heat of orog- terms of continental or colli- eny. At many continental margin plate sion. However, a number of large-scale deformation over long geological peri- boundaries, there are broad belts with tectonic problems are not explained by ods. They have some characteristic that a long history of distributed deforma- the simple rigid plate and continental allows them to maintain an especially tion. These regions are mobile because collision models. In this article, we pre- thick, strong lithosphere, such as a more the lithosphere is sufficiently weak to sent explanations for two such tectonic refractory mantle composition (Jordan, be deformed by the forces developed problems: the origin of long-lived active 1978; Forte and Perry, 2000). The rea- at plate boundaries. We conclude that “mobile belts” that lie along a number son for the long histories of tectonic mobile belts are weak because they are of continental margin plate boundaries, activity in the mobile belts has not been hot, and they are hot as a consequence contrasted to the stability of and clear. Also, most continental mobile of their position in present or recent platforms, and the origin of the heat of belts have high elevation; they are backarcs. Most continental backarcs continental collision . Current mountain belts. Surprisingly, however, have thin and hot lithospheres, not just mobile belts are up to 1000 km wide there is commonly no crustal thicken- those with active extension or rifting. and cover nearly a quarter of the conti- ing. In this article, we emphasize the Moho temperatures are 800–900 °C and nents (e.g., Stein and Freymueller, 2002; important distinction between long-lived lithosphere thicknesses are 50–60 km, Thatcher, 2003). For example, the North mobile mountain belts where the eleva- compared to 400–500 °C and 150–300 American Cordillera has been tectoni- tion is mainly thermally supported and km for cratons and other regions with a cally active for >180 m.y., with evidence short-lived or terrane collision thermotectonic age greater than ca. 300 for older tectonic events extending this where there is major crustal Ma. The temperature differences result history to >350 m.y. (e.g., Burchfiel et shortening and thickening. in backarc lithospheres that are weaker al., 1992) (Fig. 1). Rates of deformation Plate tectonics provides an elegant than cratons by more than a factor of in current mobile belts are commonly explanation for orogenic crustal short- 10. Backarcs may be hot because shal- 5–15 mm/yr; i.e., 10%–20% of the main ening and thickening in terms of con- low asthenosphere convection results plate boundary rates as indicated by tinental or terrane collision when an from the reduction in viscosity due distributed seismicity, precision global ocean closes. However, an important to water rising from the underlying positioning system (GPS) measure- question remains unresolved that we subducting plate. Hot, weak, former ments, and geological studies. attempt to address: What is the origin backarcs are expected to be the locus The long geological histories of defor- of the heat of orogeny? Significant heat of most deformation during continent mation suggest that these mobile belts from frictional deformation processes or terrane collision orogeny. The heat exhibit long-term lithosphere weak- has been discounted through studies by indicated by orogenic plutonism, high ness compared to cratons. In contrast, a number of authors, and most other grade , and ductile defor- the cratons and stable orogenic processes should absorb rather mation may come from the preexisting platforms have exhibited little internal than generate heat.

GSA Today: v. 15, no. 2, doi: 10:1130/1052-5173(2005)015<4:SZBMBA>2.0.CO;2

4 FEBRUARY 2005, GSA TODAY In this study, we examine the hypoth- 2004). It is well recognized that exten- eses that (1) most mobile belts are sional backarcs are hot (e.g., Wiens located in backarcs or recent backarcs and Smith, 2003), including the Basin that are characterized by hot, thin, and and Range and extensional west Pacific weak lithospheres; and (2) most conti- backarc basins. In these regions, rifting nent or terrane collision orogenic belts and spreading are obvious sources of involve shortening of former hot back- heat. We therefore focus on nine back- arc mobile belts. We do not discuss less arcs where we conclude that there is no common weakening mechanisms that current or recent thermally significant subsequently may be reactivated in col- extension in the region, as indicated lision, such as localized extension and by GPS, seismicity, or geological stud- hotspots. ies (Fig. 3). Our areas are all more than BACKARC THERMAL STRUCTURE 100 km from such extension; Morgan (1983) showed that the thermal effects Why are mobile belt regions so weak Figure 2. Temperature vs. depth for the of extend only a short distance. The and why are cratons so strong for long Cascadia backarc and adjacent (from geological periods? The primary reason Hyndman and Lewis, 1999). thermal effect of extension decays with appears to be that the mobile belts are a time constant of ~50 m.y., so we have hot, whereas cratons are cold (e.g., Q), effective elastic thickness, Te, ther- also excluded areas with significant Vitorello and Pollack, 1980; Chapman mally supported high elevations, seismic mid-late Cenozoic extension. and Furlong, 1992), and, below the estimates of lithosphere thickness, and We summarize the two principal indi- upper crust brittle zone, there is a strong . The high tem- cators of high temperatures in Figure decrease in strength with increasing peratures of current mobile belts are 4 (for details and references, see the 1 temperature. The systematic decrease also indicated by widespread sporadic GSA Data Repository ): (1) surface 2 in heat flow with age, or time since the Cenozoic basaltic volcanism, in con- heat flow greater than ~70 mW/m (for last “thermotectonic event,” has been trast to the almost complete absence of normal upper crust heat generation 3 well recognized. The greatest difference recent volcanism in cratons and stable of 1.0–1.5 μW/m ) (e.g., Lewis et al., is between the currently active mobile platforms. The same indicators of tem- 2003; Chapman and Furlong, 1992); and belts (70–90 mW/m2) compared to the perature show the lithospheres of cra- (2) low seismic velocities in the upper cratons (~40 mW/m2) (e.g., Chapman tons to be cold and >200 km thick. mantle (i.e., Pn velocities <7.9 km/s and Furlong, 1992; Vitorello and We have carried out a global survey compared to ~8.2 km/s for cratons) Pollack, 1980). Temperatures at the base of continental backarcs, and, in all (e.g., Black and Braile, 1982; Lewis et al., of the crust are ~400 °C lower for cold cases where there is sufficient data, we 2003) or seismic tomography veloci- cratons compared to young, hot mobile have found surprisingly high and uni- ties lower than the global average by at belts (i.e., 400–500 °C vs. 800–900 °C, form temperatures across wide zones, least 2% for P-waves or 4% for S-waves respectively). Although only the cool- indicated by heat flow and other deep (~4% and ~7% slower relative to cratons) est case of cratons is discussed here, temperature constraints (also see Currie, (e.g., Goes et al., 2000; Goes and van Paleozoic stable areas are only slightly warmer than cratons and are estimated to be almost as strong. As an example, Figure 2 shows temperature estimates for the Canadian Cordillera mobile belt compared to the adjacent Canadian (Hyndman and Lewis, 1999; Lewis et al., 2003). With these thermal estimates, the base of the mobile belt lithosphere (hot enough for vigorous convection, close to the solidus) is at a depth of only 50–60 km. The mobile belt high temperatures and thin lithospheres also are inferred from many other deep temperature indica- tors, including temperature-dependent uppermost mantle seismic properties (Moho refraction velocity, Pn, tomog- raphy compression and wave Figure 3. Examples of nonextensional backarcs with high heat flow and velocities, Vp and Vs, and attenuation, other high temperature indicators.

1GSA Data Repository item 2005030, Table DR1, notes, and references for Figure 4, is available on request from Documents Secretary, GSA, P.O. Box 9140, Boulder, CO 80301-9140, USA, [email protected], or at www.geosociety.org/pubs/ft2005.htm.

GSA TODAY, FEBRUARY 2005 5 ELEVATION OF MOBILE BELTS An important attribute of most continental mobile belts that indicates they are hot is high elevation. They are mountain belts. This elevation is usually in spite of relatively thin crust. For example, very little of the North America Cordillera has a crustal thickness greater than ~35 km (Mooney et al. 1998; Perry et al., 2002), but elevations are commonly ~1500 m. In contrast, cratons have elevations usually near and average crustal thicknesses of ~40 km. Only in a few mountain belt regions of unusually high elevation and tec- tonic crustal thickening, such as Tibet, the central part of the , and part of the Alps, is there thick crust. We argue that high elevations therefore provide a simple first order mapping association for hot, thin lithosphere. Mobile belts are inferred to be in isostatic balance, in spite of the combination of high elevation and thin crust, because there is thermal expansion and density reduction to a depth of several hundred km relative to stable cratonic and areas. The effect of crust and upper mantle temperature on elevation has been discussed in detail by Lachenbruch and Morgan (1990). In a simple approximation, the density change due to a 200 °C average temperature difference to a depth of 150 km and a coefficient of thermal expansion of 3.5 × 10−5 per °C will approximately balance an elevation difference of 1 km or a crustal thickness difference of ~7 km (e.g., Lachenbruch and Morgan, 1990; Hyndman and Lewis, 1999). CONVECTION MODEL FOR BACKARCS AND THE ROLE OF WATER An explanation for why most mobile belts are hot is that they are all in backarcs or recent backarcs, and all backarcs are hot, as discussed above. The high temperatures are likely due to rapid upward convective heat transfer beneath thin lithospheres (e.g., Hasebe et al., 1970). We show a schematic convection model in Figure 5, along with the heat flow across Figure 4. Heat flow (HF) data and other indicators of high temperatures the southern Canadian Cordillera from the trench to the cra- across backarcs. References are given in the GSA Data Repository (see ton. Most models of backarc convection have assumed that footnote 1). Pn—refraction uppermost mantle velocity; V —tomography p the circulation is driven by the traction and thermal effects of compressional velocity; Vs—shear velocity. the downgoing oceanic plate. However, it has proved difficult der Lee, 2002). Temperature appears to be the dominant con- trol of mantle velocity; the effects of composition, partial melt, anisotropy, etc., usually are much smaller (e.g., Goes et al., 2000; Wiens and Smith, 2003). We include one oceanic backarc (Bering Sea) and one for- mer continental backarc (the northern Canadian Cordillera that was cut off by transform faulting in the Eocene) that give very similar thermal results to the current continental back- arcs. The heat flow averages range from 70 to 85 mW/m2; Pn velocities are low, 7.8–7.9 km/s, and seismic tomography velocities are low, consistent with high lithosphere tempera- tures (i.e., ~800 °C at the Moho). There are also only small variations in heat flow and in the other indicators of deep temperatures across the backarcs. All of the other backarcs we have examined show evidence that they are hot, although they provide less information. It is well recognized that an active volcanic arc requires high temperatures (~1200 °C) in the underlying mantle wedge at a depth of ~100 km; how- Figure 5. Heat flow across the N. Cascadia backarc and thermal-tectonic ever, we find that the high lithosphere temperatures extend model. Solid points are corrected, open points uncorrected, for crustal across the whole backarc, even where there is no extension. heat generation, following Hyndman and Lewis (1999).

6 FEBRUARY 2005, GSA TODAY to produce uniform high heat flow across the backarc with criteria for brittle failure (e.g., Ranalli, 1995) with hydrostatic such models, and regional small-scale convection seems to pore pressure (e.g., Townend and Zoback, 2000), and defor- be required (Currie et al., 2004; see also Nyblade and Pollack, mation at greater depths follows power law creep (Karato 1993). To maintain the high backarc heat flow, convection and Wu, 1993) at a common plate boundary deformation rate must be vigorous, with flow rates faster than relative plate of ~10−15s−1. The upper crust has the rheology of , the rates (e.g., Currie et al., 2004). lower crust of diabase, and the mantle of olivine (e.g., Ranalli, In a few continental areas such as the Basin and Range, 1995). The much thinner and weaker lithosphere predicted present or recent crustal extension has an additional thermal for backarcs compared to cratons is clear. effect (e.g., Lachenbruch and Sass, 1977). Similarly, in the The total strength of the lithosphere may be estimated areas of oceanic backarcs where extension is occurring, it by integrating the strength over depth (Fig. 6, bottom). Wet is difficult to separate the thermal effect of extension from and dry refer to the laboratory rheologies that may apply to that of convective heat transport in the underlying shallow backarc mobile belts and cratons, respectively. The combined asthenosphere. However, Watanabe et al. (1977) suggested crustal and mantle lithosphere strength for backarc mobile that even in these basins, small-scale convection is needed to belts is at least a factor of 10 less than for cold cratons. explain the thin lithospheres and the high heat flow asymp- The mobile belt lithosphere strengths of <5 × 1012 N/m are tote for long times after the basins opened. within the range suggested for plate tectonic forces and the An explanation for shallow vigorous convection beneath gravitational potential of mountain belts of 1–10 × 1012 N/m backarc lithospheres is that, in addition to high temperatures, (Lynch and Morgan, 1987; Whittakaer et al., 1992; Zoback the mantle viscosity is lowered by incorporation of water et al., 2002). In contrast, craton lithospheres are too strong expelled from the underlying subducting oceanic plate (e.g., to be readily deformed. Alternatively, if one fixes the plate Dixon et al., 2004; Honda and Saito, 2003). The amount of boundary forces at the estimated values, the calculated strain water supplied is estimated to be very large (e.g., Peacock, rates for backarc mobile belts are in the range observed 1993). The backarc convection system is poorly understood, for plate boundaries and are very small for stable cratons but vigorous convection may mix the water throughout the and platforms (Zoback et al., 2002). This large difference in whole wedge. Mantle rocks containing small amounts of lithosphere strength between hot backarcs and cold cratons water in the mineral structure (>50 ppm) have a substantially lower effective viscosity than dry mantle rocks (e.g., Karato and Wu, 1993). Dixon et al. (2004) summarized the evidence for very low mantle viscosity beneath the Cordillera (former backarc) of the western United States and concluded that such low viscosities require significant water in the upper mantle, as well as high temperatures that are close to the solidus. They also argue that the observed very low shear- wave velocities in the upper mantle from seismic tomography require water as well as high temperatures. In areas where the landward boundary of the backarc is a craton or old platform, the asthenosphere convection may be limited by thick, refractory craton lithosphere. However, the original craton rifting and associated asthenosphere upwelling may have extended and heated a considerable width of the margin of the craton or platform. This would have allowed subsequent backarc thermal convection to continue beneath the thinned region to the edge of the unextended craton lith- osphere. The backarc also may be widened by the addition of accreted , such as in western North America. LITHOSPHERE STRENGTH OF BACKARC MOBILE BELTS Lithosphere strength is expected to be the primary control on the nature of deformation processes. Lithosphere strength increases with depth in the shallow frictional regime, but at greater depths where there is ductile deformation, tem- perature and composition (especially crust vs. mantle) are the most important controls (e.g., Ranalli, 1995), so strength decreases with depth. A representative example of the strength of the lithosphere as a function of depth in a high temperature mobile belt and low temperature craton is shown in Figure 6 (top) for the Canadian Cordillera and adjacent (see Flück et al., 2003; Lewis et al., 2003). In Figure 6. Top: strength vs. depth. Bottom: total lithosphere strength for this simple model, the upper crust follows the Byerlee’s Law hot backarc mobile belts and cold cratons.

GSA TODAY, FEBRUARY 2005 7 should play a major role in subsequent nation of free convection occurs less orogenic deformation. Also, most back- than a few tens of millions of years after arc mobile belts are hot enough for the subduction stops. lower crust to be very weak and to allow CONTINENTAL COLLISION AND lower crust detachment (Fig. 6, top). OROGENIC HEAT DURATION OF HIGH Recognizing that most continental TEMPERATURES IN MOBILE BELTS or terrane collisions inherit preexist- There must be a finite life to the high ing hot, weak backarcs may provide a temperatures in backarc mobile belts resolution to the long-standing problem after the source of heat is removed, of the origin of the heat of orogeny since most past mobile belts active (e.g., Loosveld and Etheridge, 1990; in the Paleozoic or earlier no longer Jamieson et al., 1998; Thompson et al., exhibit the characteristic high litho- 2001; Vanderhaeghe and Teyssier, 2001; sphere temperatures. In the backarc Collins, 2002). High temperatures are convection model, the vigorous free Figure 7. Heat flow vs. thermotectonic age. The a defining feature of orogenic belts, as convection should decline rapidly zero time is interpreted to mark the termination inferred from widespread granitic pluto- of backarc convection (data references in text). following the termination of subduc- nism, high temperature regional meta- tion and the loss of water as a flux for morphism, and ductile deformation at convection. Although the processes To illustrate the cooling, we have mid-crustal depths. Often, the heat and involved are undoubtedly complex, used a simple conductive model with high temperatures are simply ascribed lithosphere cooling and thickening an initial ~50-km-thick backarc litho- to “orogenic heating” without reference are probably conductive following the sphere and an underlying adiabatic to the mechanism. In fact, most oro- increase in upper mantle viscosity due asthenosphere (Currie, 2004) (Fig. 7). genic processes should absorb heat. to water loss through partitioning into This model is the limiting case of abrupt We discuss only continent or terrane arc and backarc melt fractions and termination of convection to a depth collision orogeny where the backarc is through upward diffusion. of 250 km (approximate thickness of continental. Some backarcs are primar- The cooling time constant may be craton lithosphere) at the time of ter- ily oceanic and may be largely con- estimated from compilations of heat mination of subduction. Variations with sumed by subduction during closure. flow (and inferred lithosphere tempera- depth of thermal properties and heat Two main sources of heat have been tures) versus age of the last thermotec- generation are included (e.g., Lewis et previously proposed. The first ascribes tonic event (e.g., Chapman and Furlong, al., 2003). The addition of the effect of high temperatures to backarc extension 1992; Pollack et al., 1993; Chapman of the high-radioactivity upper prior to collision. This explanation has and Pollack, 1975; Pavlenkova, 1996; crust would give a somewhat lower the problem that the extension must Artemieva and Mooney, 2001) (Fig. 7). heat flow at long times (Fig. 7). We also occur less than 50 m.y. before the col- The thermotectonic age is assumed to recognize that the thermotectonic age lision orogeny for the heat not to have correspond approximately to the time used in the heat flow data plot (peak decayed. Also, Thompson et al. (2001) since termination of subduction and regional metamorphism, major oro- argue that there must be thinning of the therefore of water input. Most of the genic plutonism, etc.) is not precisely mantle lithosphere with little thinning of rapid decrease in heat flow appears to the same as the age of termination of the crust to explain the inferred crustal be in the several hundred m.y. follow- subduction. However, the heat flow as a thicknesses following collision. The sec- ing the last thermotectonic event. A sim- function of age predicted by the model ond proposed heat source is high radio- ilar cooling and lithosphere thickening is in good agreement with that observed active heat generation rocks emplaced time is suggested by several examples. (Fig. 7), which suggests that the termi- in the lower crust during the shortening. The Appalachian mobile belt, with its last significant deformation ca. 300 Ma, is now cool and stable. Although heat flow and other thermal data suggest that it is still somewhat warmer than the cratons (e.g., Pollack et al., 1993), the difference may be primarily due to greater upper crust heat generation (Mareschal and Jaupart, 2004). In con- trast, the northern Canadian Cordillera, where margin subduction was cut off by the Queen Charlotte transform in the Eocene, has high heat flow and inferred deep temperatures (Lewis et al., 2003), similar to currently active back- Figure 8. Model for initial collision of a weak backarc mobile belt–the northern Canadian Cordillera example. arcs (Fig. 4).

8 FEBRUARY 2005, GSA TODAY This explanation has the problem that allow the crust of the whole backarc Black, P.R., and Braile, L.W., 1982, Pn velocity and cool- ing of the continental lithosphere: Journal of Geophysical it results in maximum temperatures to be thickened to >50 km, such as Research, v. 87, p. 10,557–10,568. 50–100 m.y. after collision, whereas for the Altiplano of the Burchfiel, B.C., Cowan, D.S., and Davis, G.A., 1992, peak metamorphic assemblages are Cordillera, for Tibet, and perhaps for Tectonic overview of the Cordilleran orogen in the western United States, in Burchfiel, B.C., Lipman, P.W., and Zoback, commonly argued to be synchronous the of western North M.L., eds., The Cordilleran Orogen: Conterminous U.S.: with thickening (e.g., Thompson et al., America. This thickening may be associ- Boulder, Colorado, Geological Society of America, The , v. G-3, p. 407–479. 2001; Collins, 2002). This delayed heat- ated with lower crust ductile thickening Chapman, D.S., and Furlong, K.P., 1992, Thermal state of ing also does not explain how shorten- and extrusion (e.g., Bird, 1991; Meissner the , in Fountain, D.M., Arculus, R.J., and Kay, R.W., eds., Continental lower crust: Developments in ing and thickening can be initiated in and Mooney, 1998). Geotectonics: Elsevier, Amsterdam, v. 23, p. 179–199. cold, strong lithosphere prior to the CONCLUSIONS Chapman, D.S., and Pollack, H.N., 1975, Global heat flow: heating. We suggest that hot and thin a new look: Earth and Planetary Science Letters, v. 28, The main conclusions of this work p. 23–32, doi: 10.1016/0012-821X(75)90069-2. former backarc lithosphere is commonly are (1) Continental mobile mountain the primary locus of shortening (i.e., Collins, W.J., 2002, Hot orogens, tectonic switch- belts exhibit long-term weakness com- ing, and creation of continental crust: Geology, v. 30, the vise or inherited weakness model; pared to cratons and stable platforms. p. 535–538, doi: 10.1130/0091-7613(2002)030<0535: Ellis et al., 1998; Thompson et al., 2001; HOTSAC>2.0.CO;2. Mobile belts deform readily because Currie, C.A., 2004, The thermal structure of subduc- Collins, 2002). The orogenic heat comes they are hot and weak enough to be tion zones and backarcs [Ph.D. thesis]: Victoria, British Columbia, Canada, University of Victoria, 267 p. from the preexisting hot backarc, not deformed by forces of the magnitude from the orogenic process itself. Currie, C.A., Wang, K., Hyndman, R.D., and He, J., 2004, transmitted from plate boundaries. The thermal effects of slab-driven mantle flow above a sub- The high temperature backarc thermal (2) Most mobile belts are hot and weak ducting plate: The Cascadia subduction zone and backarc: regime and inferred lithosphere strength Earth and Planetary Science Letters, v. 223, p. 35–48, doi: because they are, or recently were, 10.1016/j.epsl.2004.04.020. model also provide insight into the ini- located in backarcs. They may be hot Dixon, J.E., Dixon, T.H., Bell, D.R., and Malservisi, R., 2004, tial development of backarc shortening because of shallow asthenosphere Lateral variation in upper mantle viscosity: Role of water: in continental collision. Initial shorten- Earth and Planetary Science Letters, v. 222, p. 451–467, doi: convection, facilitated by water from 10.1016/j.epsl.2004.03.022. ing and crustal thickening appear to the underlying subducting slab. (3) Ellis, S., Beaumont, C., Jamieson, R., and Quinlan, G., be concentrated at the leading and Continental collision orogenic shorten- 1998, Continental collision including a weak zone—the trailing edges of the mobile belt. In the vise model and its application to the Newfoundland ing is expected to be concentrated in Appalachians: Canadian Journal of Earth Sciences, v. 35, example of the collision of the Yakutat former backarc mobile belts that are p. 1323–1346, doi: 10.1139/cjes-35-11-1323. terrane in the Gulf of Alaska ca. 5 Ma, much weaker than the adjacent stable Flück, P., Hyndman, R.D., and Lowe, C., 2003, Effective there has been strong shortening in the elastic thickness Te of the lithosphere in Western Canada: areas. The preexisting or inherited high Journal of Geophysical Research, v. 108, no. B9, 2430, coastal collision zone and again in the temperatures provide an explanation for doi:10.1029/2002JB002201. Mackenzie of the eastern Forte, A.M., and Perry, H.K., 2000, Geodynamic evi- widespread orogenic plutonism, high dence for a chemically depleted continental tectosphere: Cordillera. There has been little shorten- temperature regional metamorphism, Science, v. 290, p. 1940–1944, doi: 10.1126/sci- ence.290.5498.1940. ing in the intervening central Cordillera, and ductile crustal deformation. Backarc and the crust remains thin (32–35 km Goes, S., and van der Lee, S., 2002, Thermal structure of the and subsequent tempera- North American uppermost mantle inferred from seismic to- thick) (e.g., Mazzotti and Hyndman, tures may be high enough for lower mography: Journal of Geophysical Research, v. 107, no. B3, 2050, doi: 10.1029/2000JB000049. 2002) (Fig. 8). The backarc lower crust crust detachment that decouples com- detachment must be sufficiently weak Goes, S., Govers, R., and Vacher, P., 2000, Shallow tempera- plex surface tectonics from the upper- tures under Europe from P and S wave tomography: Journal to transfer the collision to the most mantle and for lower crustal flow. of Geophysical Research, v. 105, p. 11,153–11,169, doi: weak foreland and thrust belt, even 10.1029/1999JB900300. though the Cordilleran lithosphere is ACKNOWLEDGMENTS Hasebe, K., Fujii, N., and Uyeda, S., 1970, Thermal pro- cesses under island arcs: , v. 10, p. 335–355, very thin. In contractional orogens, it We thank Trevor Lewis and Steven doi: 10.1016/0040-1951(70)90114-9. has been argued that a through-going Johnston for helpful discussions. Hindle, D., Kley, J., Klosko, E., Stein, S., Dixon, T., and basal detachment in the lower crust Reviewers Leigh Royden, Brendan Norabuena, E., 2002, Consistency of geologic and geodetic displacements during Andean orogenesis: separates the entire crustal section from Murphy, Sean Willett, Warren Hamilton, Geophysical Research Letters, v. 29, no. 8, 1188, doi: the underlying lithosphere (Oldow et and Kevin Burke, although they did not 10.1029/2001GL013757. always agree with us, provided excep- Honda, S., and Saito, M., 2003, Small-scale convection al., 1990). If this is correct for backarc under the back-arc occurring in the low viscosity wedge: mobile belts, thrust faults, transcurrent tionally thorough and helpful reviews. Earth and Planetary Science Letters, v. 216, p. 703–715, doi: faults, and extension normal faulting We also thank GSA Today science edi- 10.1016/S0012-821X(03)00537-5. tors Gerry Ross and Keith Howard for Hyndman, R.D., and Lewis, T.S., 1999, Geophysical conse- are restricted to the overlying detached quences of the Cordillera-Craton thermal transition in S.W. crustal section. Lower crust detachments careful and thorough treatment of the Canada: Tectonophysics, v. 306, p. 397–422, doi: 10.1016/ seem necessary to explain the com- manuscript. This is Geological Survey of S0040-1951(99)00068-2. Canada Publication number 2003201. Jamieson, R.A., Beaumont, C., Fullsack, P., and Lee, B., mon characteristics of foreland fold and 1998, Barrovian regional metamorphism: Where’s the heat?, thrust belts where the upper mobile belt REFERENCES CITED in Treloar, P.J. and O’Brien, P.J., eds., What drives metamor- phism and metamorphic reactions?: London, Geological crust is thrust over the stable craton or Artemieva, I.M., and Mooney, W.D., 2001, Thermal thick- Society Special Publication 138, p. 23–51. ness and evolution of Precambrian lithosphere: A global platform (e.g., the northern Canadian Jordan, T.H., 1978, Composition and development of the study: Journal of Geophysical Research, v. 106, p. 16,387– continental tectosphere: Nature, v. 274, p. 544–548. Cordillera; Mazzotti and Hyndman, 16,414, doi: 10.1029/2000JB900439. Karato, S., and Wu, P., 1993, Rheology of the upper mantle: 2002) and the Andes of central South Bird, P., 1991, Lateral extrusion of lower crust from a synthesis: Science, v. 260, p. 771–778. America (Hindle et al., 2002). With fur- under high topography, in the isostatic limit: Journal of Geophysical Research, v. 6, p. 10,275–10,286. Lachenbruch, A.H., and Morgan, P., 1990, Continental ther shortening, the high temperatures extension, , and elevation; formal relations

GSA TODAY, FEBRUARY 2005 9 and rules of thumb: Tectonophysics, v. 174, p. 39–62, doi: Morgan, P., 1983, Constraints on thermal processes from Tectonophysics, v. 332, p. 115–141, doi: 10.1016/S0040- 10.1016/0040-1951(90)90383-J. heat flow and uplift: Tectonophysics, v. 94, p. 277–298, doi: 1951(00)00252-3. 10.1016/0040-1951(83)90021-5. Lachenbruch, A.H., and Sass, J.H., 1977. Heat flow in Townend, J., and Zoback, M.D., 2000, How faulting the United States and the thermal regime of the crust, in Nyblade, A.A., and Pollack, H.N., 1993, A comparative keeps the crust strong: Geology, v. 28, p. 399–402, doi: Heacock, J.G., Keller, G.V., Oliver, J.E., and Simmons, G., study of parameterized and full thermal-convection models 10.1130/0091-7613(2000)28<399:HFKTCS>2.0.CO;2. eds., The Earth’s crust; its nature and physical properties: in the interpretation of heat flow from cratons and mobile Vanderhaeghe, O., and Teyssier, C., 2001, Partial melt- American Geophysical Union, Geophysical Monograph 20, belts: Geophysical Journal International, v. 113, p. 747–751. ing of crust and flow of orogens: Tectonophysics, v. 342, p. 626–675. Oldow, J.S., Bally, A.W., and Avé Lallemant, H.G., 1990, p. 451–472. Lewis, T.J., Hyndman, R.D., and Flück, P., 2003, Heat flow, Transpression, orogenic float, and lithospheric bal- Vitorello, I., and Pollack, H.N., 1980, On the variation heat generation, and crustal temperatures in the northern ance: Geology, v. 18, p. 991–994, doi: 10.1130/0091- of continental heat flow with age and the thermal evolu- Canadian Cordillera: Thermal controls of tectonics: Journal 7613(1990)0182.3.CO;2. tion of : Journal of Geophysical Research, v. 85, of Geophysical Research, v. 108, no. B6, 2316, doi: Pavlenkova, N.I., 1996, Crust and upper mantle struc- p. 983–995. 10.1029/2002JB002090. ture in northern from seismic data: Advances in Watanabe, T., Langseth, M.G., and Anderson, R.N., 1977, Loosveld, R.J.H., and Etheridge, M.A., 1990, A model for , v. 37, p. 1–133. Heat flow in back-arc basins of the western Pacific, in low-pressure facies metamorphism during crustal thicken- Peacock, S.M., 1993, Large-scale hydration of the litho- Talwani, M., and Pitman, W.C., III, eds., Deep sea trenches ing: Journal of Metamorphic Geology, v. 8, p. 257–267. sphere above subducting slabs: Chemical Geology, v. 108, and back-arc basins: Maurice Ewing Series 1, Washington, Lynch, H.D., and Morgan, P., 1987, The tensile strength of p. 49–59, doi: 10.1016/0009-2541(93)90317-C. American Geophysical Union, p. 137–161. the lithosphere and the localization of extension, in Coward, Perry, H.K.C., Eaton, D.W., and Forte, A., 2002, LITH5.0; a Whittakaer, A., Bott, M.H.P., and Waghorn, G.D., 1992, M.P., et al., eds., Continental : London, revised crustal model for Canada based on Lithoprobe re- Stresses and plate boundary forces associated with subduc- Geological Society Special Publication 28, p. 53–66. sults: Geophysical Journal International, v. 150, p. 285–294, tion: Journal of Geophysical Research, v. 97, p. 11,933– Mareschal, J.C., and Jaupart, C., 2004, Variations of surface doi: 10.1046/j.1365-246X.2002.01712.x. 11,944. heat flow and lithospheric thermal structure beneath the Pollack, H.N., Hurter, S.J., and Johnson, J.R., 1993, Heat Wiens, D.A., and Smith, G.P., 2003, Seismological con- North American craton: Earth and Planetary Science Letters, flow from the Earth’s interior: Analysis of the global data straints on structure and flow patterns within the mantle v. 223, p. 65–77, doi: 10.1016/j.epsl.2004.04.002. set: Reviews of Geophysics, v. 31, p. 267–280, doi: wedge, in Eiler, J., ed., Inside the subduction factory: Mazzotti, S., and Hyndman, R.D., 2002, Yakutat collision 10.1029/93RG01249. American Geophysical Union Geophysical Monograph and strain transfer across the northern Canadian Cordillera: 138, p. 59–81, doi: 10.1029/138GM05. Ranalli, G., 1995, Rheology of the Earth: London, Chapman Geology, v. 30, p. 495–498. and Hall, 413 p. Zoback, M.D., Townend, J., and Grollimund, B., 2002, Meissner, R.O., and Mooney, W.D., 1998, Weakness of the Steady-state failure equilibrium and deformation of intra- Stein, S., and Freymueller, J., editors, 2002, Plate Boundary lower continental crust; a condition for , uplift, plate lithosphere: International Geology Review, v. 44, Zones: American Geophysical Union Monograph 30, 425 p. and escape: Tectonophysics, v. 296, p. 47–60, doi: 10.1016/ p. 383–401. S0040-1951(98)00136-X. Thatcher, W., 2003, GPS constraints on the kinematics of continental deformation: International Geological Review, Mooney, W.D., Laske, G., and Masters, T.G., 1998, CRUST Manuscript received 11 June 2004; v. 45, p. 191–212. 5.1; a global crustal model at 5 degrees × 5 degrees: accepted 3 December 2004 n. Journal of Geophysical Research, v. 103, p. 727–747, doi: Thompson, A.B., Schulmann, K., Jezek, J., and Tolar, V., 10.1029/97JB02122. 2001, Thermally softened continental extensional zones (arcs and rifts) as precursors to thickened orogenic belts:

10 FEBRUARY 2005, GSA TODAY The Geological Society of America Meeting Wrap-Up 2004–2005 Division Officers and Past Chairs

ARCHAEOLOGICAL GEOLOGY HYDROGEOLOGY DIVISION DIVISION Janet S. Herman—Chair David L. Cremeens—Chair D. Kip Solomon—First Vice-Chair GEOSCIENCE Gary A. Huckleberry—Vice-Chair Scott W. Tyler—Second Vice-Chair Andrea K. Freeman—Secretary-Treasurer Ralph K. Davis—Secretary-Treasurer Vance T. Holliday—Past Chair Christopher E. Neuzil—Past Chair in a Changing

COAL GEOLOGY DIVISION INTERNATIONAL DIVISION World: Denver 2004 Gretchen K. Hoffman—Chair Pinar O. Yilmaz—President GSA Annual Meeting & Exposition Christopher J. Carroll—First Vice-Chair Yildirim Dilek—First Vice-President Allan Kolker—Second Vice-Chair To be determined—Second Vice-President November 7–10, 2004 Thomas D. Demchuk—Secretary Michael P. Foose—Secretary-Treasurer R.M. (Marc) Bustin—Past Chair Mark P. Cloos—Past President Registration for the 2004 Annual Meeting Suzanne Mahlburg Kay—International in Denver was a tremendous success. ENGINEERING GEOLOGY Secretary Almost 6,400 people attended technical sessions, field trips, and short courses, DIVISION LIMNOGEOLOGY DIVISION Robert H. Fakundiny—Chair Thomas C. Johnson—Chair visited the GSA bookstore and the Exhibit Susan H. Cannon—Chair-Elect Kevin M. Bohacs—Vice-Chair Hall, and took advantage of the GSA Syed E. Hasan—Secretary Michael R Rosen—Secretary William C. Haneberg—Past Chair Employment Services. David B. Finkelstein—Treasurer Elizabeth H. Gierlowski-Kordesch—Past 2004 Meeting Statistics GEOBIOLOGY & Chair Total attendance: ...... 6,370 GEOMICROBIOLOGY DIVISION Abstracts submitted: ...... 3,521 Jack D. Farmer—Chair PLANETARY GEOLOGY DIVISION Bruce W. Fouke—First Vice-Chair Eric B. Grosfils—Chair Number of technical sessions Stuart J. Birnbaum—Second Vice-Chair Thomas R. Watters—First Vice-Chair (including oral and poster sessions): ...... 249 Penelope J. Boston—Secretary R. Aileen Yingst—Second Vice-Chair Number of short courses and field trips: ...... 28 J Bret Bennington—Treasurer Louise M. Prockter—Secretary-Treasurer Number of exhibiting companies: ...... 173 Sherry L. Cady—Past Chair Michael S. Kelley—Past Chair Employment Service Number of interviews scheduled: ...... 275 GEOLOGY AND SOCIETY QUATERNARY GEOLOGY & Number of applicants on-site: ...... 105 DIVISION Number of employers using the John D. Kiefer—Chair Alan R. Gillespie—Chair on-site service: ...... 31 Richard C. Berg—First Vice-Chair John E. Costa—First Vice-Chair Susan D. Halsey—Second Vice-Chair John F. Shroder Jr.—Second Vice-Chair Positions advertised included 36 in academics as Thomas J. Evans—Secretary-Treasurer Janet L. Slate—Secretary well as many in consulting and petroleum. Scott F. Burns—Treasurer Number of new members signed up: ...... 116 GEOPHYSICS DIVISION Dennis E. Dahms—Newsletter Editor/Web Mousumi Roy—Chair Manager V.J.S. (Tien) Grauc h—Vice- Cha i r Ellen E. Wohl—Past Chair SLC 2005 Dennis L. Harry—Secretary-Treasurer • • James H. Knapp—Past Chair SEDIMENTARY GEOLOGY Science Learning Colleagues Make your plans now to attend the DIVISION GEOSCIENCE EDUCATION Laura J. Crossey—Chair 2005 GSA Annual Meeting DIVISION Christopher Paola—First Vice-Chair Elizabeth Wright—Chair Michael C. Pope—Second Vice-Chair October 16–19 in Salt Lake City. David P. Mayo—First Vice-Chair Paul K. Link—Secretary-Treasurer Abstracts are due Heather L. Petcovic—Second Vice-Chair Carol B. de Wet—Past Chair July 12, 2005, at midnight (MST). William Slattery—Secretary-Treasurer Susan M. DeBari—Past Chair & TECTONICS DIVISION HISTORY OF GEOLOGY DIVISION David R. Lageson—Chair Edward J. Rogers—Chair John W. Geissman—First Vice-Chair Gary D. Rosenberg—First Vice-Chair William M. Dunne—Second Vice-Chair Julie R. Newell—Second Vice-Chair Peter J. Vrolijk—Secretary-Treasurer William R. Brice—Secretary-Treasurer Elizabeth R. Schermer—Past Chair Charles W. Byers—Past Chair

GSA TODAY, FEBRUARY 2005 11 The Geological Society of America 2004 MEDALS & AWARDS

Edward M. Stolper Peter W. Lipman

ARTHUR L. DAY MEDAL GSA DISTINGUISHED Presented to Edward M. Stolper, SERVICE AWARD California Institute of Technology Presented to Peter W. Lipman, David Walker, Citationist U.S. Geological Survey, Menlo Park John E. Costa, Citationist

W. Gary Ernst

PENROSE MEDAL Presented to W. Gary Ernst, Stanford University Bruce R. Doe, Citationist

Brian K. Horton Donna L. Russell

YOUNG SCIENTIST AWARD GSA DISTINGUISHED (Donath Medal) SERVICE AWARD Presented to Brian K. Horton, Presented to Donna L. Russell, University of California–Los Angeles Geological Society of America Raymond V. Ingersoll, Citationist Foundation David A. Stephenson, Citationist

The full text of all 2004 citations and responses is online at: www.geosociety.org/ aboutus/awards

For a paper copy of any or all of Robert D. Ballard the citations and responses, Costanza Bonadonna please contact: Grants, Awards, and Recognition GSA PUBLIC SERVICE AWARD GSA SUBARU OUTSTANDING Presented to Robert D. Ballard, P.O. Box 9140 WOMAN IN SCIENCE AWARD JASON Foundation for Education Boulder, CO 80301-9140, USA Presented to Costanza Bonadonna, Diana Lee Crew, Citationist [email protected] University of South Florida (303) 357-1028 12 FEBRUARY 2005, GSA TODAY The Geological Society of America 2004 HONORARY FELLOWS

The GSA Council established the Honorary Fellows program in 1909. Except during a few war years, one or more Honorary Fellows have been elected annually since then. Honorary Fellowship may be bestowed on individuals who have lived and developed their careers outside North America and have made outstanding and internationally recognized contributions to our science, or in rare circumstances, have provided notable service to the Society.

Juan Luis Benedetto, Nicolas J. Beukes, Cornelis (Nok) Frick, Universidad de Rand Afrikaans University, International Union Cordoba, Argentina South Africa of Geological Science, South Africa

The Geological Society of America 2004 DIVISION AWARDS

Michael R. Waters Robert B. Finkelman John W. Bell RIP RAPP ARCHAEOLOGICAL GILBERT H. CADY AWARD E.B. BURWELL, JR., AWARD GEOLOGY AWARD Presented to Robert B. Finkelman, Presented to John W. Bell, Presented to Michael R. Waters, U.S. Geological Survey, Reston University of Nevada–Reno A&M University Brenda Pierce, Citationist William C. Haneberg, Citationist Steven L. Forman, Citationist

GSA TODAY, FEBRUARY 2005 13 The Geological Society of America 2004 DIVISION AWARDS

David T. Sandwell Ghislain de Marsily GEORGE P. WOOLLARD AWARD O.E. MEINZER AWARD Presented to David T. Sandwell, Presented to Ghislain de Marsily, Scripps Institution of Oceanography University of Paris VI Eli A. Silver, Citationist Mark Person, Citationist Stephen G. Brush HISTORY OF GEOLOGY AWARD Presented to Stephen G. Brush, University of Maryland Sarah E. Newcomb, Citationist

William K. Hartmann Stephen C. Porter G.K. GILBERT AWARD KIRK BRYAN AWARD Presented to William K. Hartmann, Presented to Stephen C. Porter, Planetary Science Institute, Tucson University of Washington Harry Y. McSween, Jr., Citationist Alan R. Gillespie, Citationist

The full text of all 2004 citations and responses is online at: www.geosociety.org/ aboutus/awards

James Lee Wilson For a paper copy of any or all of Kevin Burke LAURENCE L. SLOSS AWARD the citations and responses, STRUCTURAL GEOLOGY Presented to James Lee Wilson, please contact: & TECTONICS CAREER Consultant, Texas Grants, Awards, and Recognition CONTRIBUTION AWARD Maya Elrick, Citationist GSA Presented to Kevin Burke, P.O. Box 9140 University of Houston Boulder, CO 80301-9140, USA John F. Dewey, Citationist [email protected] (303) 357-1028 14 FEBRUARY 2005, GSA TODAY GSA’s Planetary Geology Division hosted a free public forum on Mars at the GSA annual meeting in Denver on Tuesday evening, CONSIDERING A CAREER November 9th. IN HYDROGEOLOGY OR HYDROLOGY? More than 600 science enthusiasts in attendance had a rare opportunity to see, hear, and ask questions of top scientists working on active Mars missions. Titled “The latest (red) dirt from the mission Check out the makers,” the program featured the latest findings from Mars, presented in layman’s terms, followed by a lively Q&A session. Mann Mentor Programs Daniel J. McCleese, chief scientist of the Mars Program at NASA’s at the Jet Propulsionfor Excellence Laboratory atin the Earth California Science Institute Teaching of Technology (Caltech) in Pasadena,for BeginningCalifornia, served Professors as moderator. 2005 Section Meetings PANELISTSThe Biggs INCLUDED: Award was established by GSA to reward Karlon Blythe, Program Officer Steven andW. Squyres, encourage professor teaching of astronomy excellence at inCornell beginning University, leadprofessors scientist and of principalearth science investigator at the for college the Mars level. The John Mann Mentors in Applied Hydrogeology EligibilityExploration Rover missions. Programs bring students and practicing hydrogeologists Michael C. Malin, president and chief scientist, Malin Space Earth science instructors and faculty from all academic together for informal conversations at all GSA section Science Systems, San Diego, California. Malin championed the institutions engaged in undergraduate education meetings and again for a special opportunity at GSA’s spectacular photographic imaging effort of the Mars Global who have been teaching full-time for 10 years or fewer. annual meeting. Surveyor mission, among other missions. (Part-time teaching is not counted in the 10 years.) At section meetings, these informal programs are Philip Christensen, Arizona State University–Tempe, a principal scheduled from 5–6:30 p.m.—right after the close of tech- investigator for the THEMIS instrument aboard the Mars Award Amount nical sessions and in close proximity to other meeting Odyssey spacecraft. Christensen summarized findings from the An award of $750 is made possible as a result of events. Mentors and students will enjoy a light supper use of that instrument. support from the Donald and Carolyn Biggs Fund of FREE pizza, salad, and soft drinks along with some Jeffrey J. Plaut, from NASA’s Jet Propulsion Laboratory at Caltech (maintained by the GSA Foundation), the GSA insightful conversations about the ins and outs of hydro- and co-principal investigator of the MARSIS instrument on Geoscience Education Division, and GSA’s Education geology or hydrology as a career. andboard Outreach the European Programs. Space In Agency’saddition, Mars this Expressaward alsomission. includesPlaut described up to $500 findings in travel from fundsthis remote to attend sensing the spacecraft,award Interested? Participation is by invitation only, but presentationwhich is currently at the inGSA orbit annual around meeting. Mars. here’s how it works: To qualify for your e-mail invitation, Audience members learned that habitable environments existed you must register online according to the cut-off dates billionsDeadline of years agoand on NominationMars, but questions Information remain as to whether below for the section meeting of your choice AND you theseNomination places were actuallyforms for inhabited. the 2005 Participants Biggs Earth were Science treated to must have previously identified hydrogeology or hydrol- spectacularTeaching images Award from are theposted surface at www.geosociety.org/of Mars that are informing ogy as one of your primary professional interests with scientistsaboutus/awards/biggs.htm. about Mars’ ancient salty Or, seas contact and volcanoes. Diane Lorenz, GSA. Not sure what you have selected as your primary (303)The forum 357-1028, was a [email protected]. hit with students as young Nominations as six, who lined interests? You can EASILY change or update your prefer- upmust at floor be microphones received by to May ask 1,questions 2005. of the scientists until time ences online at www.geosociety.org/members. ran out. Mail nomination packets to: REGISTRATION CUT-OFF DATES Diane Lorenz Northeastern Section: register online by February 7, 2005 Program Officer, Grants, Awards, and Recognition The forumGeological was sponsored Society of by America Subaru of America, Inc., and is Southeastern Section: register online by February 14, 2005 3300 Penroseavailable Place, as P.O.an on-demand Box 9140 South-Central Section: register online by February 28, 2005 WebcastBoulder, on theCO GSA80301-9140, Web site, USA www.geosociety.org/ meetings/2004/eMars.htm. Cordilleran Section: register online by March 28, 2005 North-Central Section: register online by April 18, 2005 Rocky Mountain Section: register online by April 18, 2005

Onsite registrants are not eligible to receive an e-mail invitation to the Mann Programs. The Mann Program meetings are relaxed, small-scale, and focused to encourage meaningful discussions and to promote networking opportunities for students. As a 2004 BIGGS AWARD result, attendance will be limited; respond to your e-mail Gregory S. Hancock of William and Mary College receives invitation quickly to ensure your reservation. For more the 2004 Biggs Award from Heather Macdonald, presented information, contact [email protected] or go at the National Association of Geoscience Teachers/GSA to our Web site at www.geosociety.org/science/mentors/ Geoscience Education Division Luncheon and Awards mannMentor.htm. Reception in Denver, November 2004.

GSA TODAY, FEBRUARY 2005 15 Final Announcement and Call for Papers

REGISTRATION Standard registration deadline: April 18, 2005 NORTH-CENTRAL Cancellation deadline: April 25, 2005 39th Annual Meeting Registration Fees North-Central Section, GSA Standard On-site Minneapolis, Minnesota Professional Member $135 $155 Professional Nonmember $170 $190 May 19–20, 2005 Student Member $35 $50 www.geosociety.org/sectdiv/Northc/05ncmtg.htm Student Nonmember $50 $60 K–12 Professional $30 $30 Guest $30 $30 GSA Headquarters will handle meeting registration. Please register online at www.geosociety.org. On-site registration The Minnesota Geological Survey, in conjunction with the will be available during the meeting at the Radisson Hotel Department of Geology and Geophysics of the University of Metrodome on the University of Minnesota campus. Register Minnesota, will host the 2005 annual meeting of the North- in advance to qualify for lower fees. Central Section of the Geological Society of America. Meeting dates will be Thursday, May 19, and Friday, May 20, at the On-Site Registration Schedule Radisson Hotel Metrodome on the University of Minnesota Wednesday, May 18 4:30–8 p.m. campus in Minneapolis, Minnesota. Up-to-date information Thursday, May 19 7:30 a.m.–4:30 p.m. about meeting arrangements is available on the GSA Web site Friday, May 20 7:30 a.m.–noon at www.geosociety.org/sectdiv/Northc/05ncmtg.htm. ACCESSIBILITY ENVIRONMENT GSA is committed to making its meetings accessible to all Minnesota is called “the land of 10,000 lakes,” a distinction people interested in attending. Please indicate special require- that is rooted in the geologic history of the state. Not only ments (wheelchair accessibility, etc.) on the registration form. does Minnesota boast an unusually long and diverse geologic The Radisson Hotel Metrodome is ADA compliant. record, but its natural resources are incorporated into many FIELD TRIPS aspects of the culture that has developed here. All field trips will depart from and return to the lobby of The modern cities of Minneapolis and St. Paul began on the the Radisson Hotel. The field trip coordinator is Jim Miller, banks of the Mississippi River in the middle of the nineteenth Minnesota Geological Survey, [email protected], but for de- century. Many signs of days past still exist in Minneapolis, es- tailed information, please contact individual field trip leaders. pecially in the Riverfront District, where one can still visit Fees include transportation, accommodations, lunch, and field century-old mills. With nearly two dozen lakes, the trip guidebook. Details can be found at www.geosociety.org/ Mississippi River, parks, golf courses, and miles of trails, sectdiv/Northc/05ncmtg.htm. Minneapolis is truly an outdoor enthusiast’s dream. Please be aware that cool temperatures are possible in May. PREMEETING 1. The Geology of the Mississippi River Valley—Twin The Twin Cities are easily accessible by air. The Cities Region: Using an Urban River for Inquiry- Minneapolis–St. Paul International airport is a hub for Based Earth Science Education. Sat., May 14. Kent Northwest Airlines and has non-stop flights from all major Kirkby, University of Minnesota, [email protected]; points of departure. Karen Campbell, National Center for Earth Surface CALL FOR PAPERS Dynamics. Explore some of the Twin Cities’ urban out- Abstract Deadline: February 22, 2005 crops to learn about the retreat of St. Anthony Falls, Papers are invited for a variety of technical sessions (oral discover the origin of the Mississippi River system’s only and poster). Authors interested in volunteering papers for gorge, and investigate the complex interactions between symposia should contact the appropriate convener prior to the river valley’s geologic processes and human commu- submitting an abstract. Oral presentations in most technical nities. This field trip will showcase ways to use your own sessions will be 15 minutes long, with 5 minutes for ques- community’s rivers as resources for inquiry-based science tions. Some sessions may be organized with a longer format instruction. Cost: $75. (contact session chairs for details). All oral sessions will utilize 2. Classic Precambrian Geology of Northern a single digital projector and PowerPoint software. Use of Minnesota. Tues., May 17–Wed., May 18. Mark Jirsa, overhead projectors and 35 mm slides is discouraged and will Minnesota Geological Survey, [email protected]; Jim only be accommodated by special arrangement with the ses- Miller, Minnesota Geological Survey. This “best of” field sion chair. Poster space will be 4' × 8', and authors must be trip will visit some of the famous outcrops that exem- present at their poster for at least two hours. plify the Precambrian geology of Minnesota and that

16 FEBRUARY 2005, GSA TODAY should be on everyone’s list of “must-see” outcrops Middleton, University of Wisconsin–River Falls; Gerry when running a field trip to the area. Classic exposures Webers, Macalester College. This field trip will include of the Keweenawan Duluth Complex and North Shore fossil collecting and examination of the St. Peter Volcanic Group, the Paleoproterozoic Thomson and and stratigraphy of the Shadow Falls section of Virginia Formations and Biwabik Iron Formation, and the the Glenwood Formation, Platteville Formation, and the Archean Wawa and Quetico subprovinces will be visited richly fossiliferous Lilydale Park (former Twin City Brick on this trip. Cost: $175. Company yard) section of the Decorah Shale (at 92 feet 3. Deposits and Landforms in the Region Glaciated by thick, it’s the thickest known section, only 42 miles from the St. Louis Sublobe. Tues., May 17–Wed., May 18. Al the Transcontinental Arch). Cost: $65. Knaeble, Minnesota Geological Survey, knaeb001@umn. Postmeeting edu; Gary Meyer, Minnesota Geological Survey; Howard 7. Late Ordovician Lithology and Biostratigraphy Mooers, University of Minnesota–Duluth; Phil Larson, of the Southern Margin of the Twin Cities Basin. University of Minnesota–Duluth; Lisa Marlow, University Sat., May 21. Robert Sloan, University of Minnesota, of Minnesota–Duluth. Geomorphic features, material [email protected]; Mike Middleton, University of properties, and the glacial history related to the St. Louis Wisconsin–River Falls; Gerry Webers, Macalester College. sublobe, the Rainy lobe, the Superior lobe (Mille Lacs This field trip will include fossil collecting and examina- moraine phase), glacial Lake Brainerd, and glacial Lake tion of facies changes in the St. Peter Sandstone through Aitkin II in the western St. Louis sublobe region will be Prosser Limestone of the southern margin of the Twin investigated the first day. Stratigraphic and geomorphic Cities basin. We will visit the thickest Minnesota section relationships that constrain the timing of the advance of of the Glenwood Formation, the thinnest Minnesota sec- the St. Louis sublobe in its eastern extent relative to the tion of the Platteville Formation, a section of the Decorah retreating Rainy and Superior lobes, the history of glacial Shale at Zumbrota, and a catastrophic burial layer in the Lakes Aitkin and Upham I and II, and a newly defined Prosser Limestone. Cost: $65. lake that formed in the wake of the wasting St. Louis sub- 8. Pre-Cretaceous Weathering Profile and Cretaceous lobe, Lake Sucre, will be examined the second day. Cost: Geology of the Minnesota River Valley Area. Sat., $175. May 21. Larry Zanko, Natural Resources Research 4. of the East-Central Minnesota . Institute, [email protected]; Dale Setterholm, Wed., May 18. Terry Boerboom, Minnesota Geological Minnesota Geological Survey; John Heine, Natural Survey, [email protected]; Daniel Holm, Kent State Resources Research Institute. Exposures associated with University; Randy Van Schmus, University of Kansas. the Minnesota River Valley and mining in that area pro- This trip will examine several different post-Penokean vide opportunities to view products of the intense Pre- Paleoproterozoic granitic intrusions of the east-central Cretaceous chemical weathering episode and the Late Minnesota batholith, post-batholith dikes, and weathering Cretaceous sediments that immediately overlie them. The processes. We will discuss recently acquired geochrono- weathered materials vary in character with the degree of logical data from these intrusions in relation to the wan- weathering and the composition of the parent rock. The ing stages of the Paleoproterozoic Penokean Orogen. Cretaceous strata represent interdistributary, distributary, The trip will include several stops at active and inactive and lacustrine brackish and freshwater environments of quarries. Cost: $65. a fluvially dominated delta plain and contain many rock 5. Sinkhole Anatomy 101—Karst Geology of Southern and fossil types in a small area. The weathering products Minnesota. Wed., May 18. Bob Tipping, Minnesota and the sedimentary rocks are mined for use in brick- Geological Survey, [email protected]; Calvin Alexander, making and cement. Cost: $75. University of Minnesota; Tony Runkel, Minnesota 9. Architecture of an Archean : Geological Survey; Howard Hobbs, Minnesota Geological Stratigraphy, Structure, and Mineralization. Sat., Survey. Join us on the backhoe excavation of a karst May 21–Sun., May 22. Dean Peterson, Natural Resources sinkhole on the Cave Farm near Spring Valley, Minnesota. Research Institute, [email protected]; Mark Jirsa, Our host is the owner of the Spring Valley Caverns Karst Minnesota Geological Survey; George Hudak, University preserve, John Ackerman. This field trip will feature the of Wisconsin–Oshkosh. Archean greenstone belts are excavation of a sinkhole. Our goal will be to prepare one of the world’s premier geologic settings for hosting a cross sections of the sinkhole, to document and charac- variety of economically important mineral deposit types. terize whatever materials we find, and to prepare a short These deposits include high-grade iron ore, lode-gold, report on our findings. This trip will be limited to 20 volcanogenic massive sulfide, and -associated participants. Applicants will be selected based on their nickel, magnesite, and a number of others. The origin of ability and willingness to contribute skills, sample charac- these deposits is intrinsically linked to the architecture terization, and mapping techniques to the overall excava- of the greenstone belt, namely the interrelationships tion. We will also tour part of Spring Valley Caverns and between stratigraphy, structural setting, and hydrothermal other surface karst features on the Cave Farm. Cost: $65. fluids. The Vermilion district of northeastern Minnesota is 6. Late Ordovician Stratigraphy and Paleontology of a well exposed greenstone belt that displays a number of the Twin Cities Basin. Wed., May 18. Robert Sloan, classic features of this geologic setting. Cost: $180. University of Minnesota, [email protected]; Mike

GSA TODAY, FEBRUARY 2005 17 10. The Western Margin of the Keweenawan ABSTRACTS : Geologic Highlights of Abstract Deadline: February 22, 2005 Archean, Paleoproterozoic, Keweenawan, and Abstracts for all sessions should be submitted online at Paleozoic Bedrock in Eastern Minnesota and www.geosociety.org/sectdiv/Northc/05ncmtg.htm. An Northwestern Wisconsin. Sat., May 21–Sun., May abstract submission fee of $10 will be charged. If you cannot 22. Terry Boerboom, Minnesota Geological Survey, submit your abstract electronically, contact Nancy Carlson, [email protected]; Daniel Holm, Kent State University; (303) 357-1061, [email protected]. Karl Wirth, Macalester College; Karen Halvholm, University of Wisconsin–Eau Claire; Bill Cannon, U.S. TECHNICAL SESSIONS Geological Survey; Laurel Woodruff, U.S. Geological Symposia Survey. This trip will start in Archean rocks and end 1. Continental Tectonics of Shield Regions. Daniel in Paleozoic rocks. Stops in between will examine Holm, Kent State University, [email protected]; David Paleoproterozoic, Keweenawan, and Paleozoic uncon- Schneider, Ohio University, [email protected]. formities, stratigraphy, and the structural-metamorphic 2. Deep Earth Science: Prospects for a Deep history of Paleoproterozoic sedimentary and volcanic Underground National Laboratory. John Goodge, rocks, and structural and volcanic features, intrusive rela- University of Minnesota–Duluth, [email protected]; tionships, and alteration-mineralization of Keweenawan Dean Peterson, Natural Resources Research Institute, volcanic, intrusive, and sedimentary rocks. Cost: $185. [email protected]. 11. Geology and Sedimentology of the Paleoproterozoic 3. Groundwater Sustainability. Cosponsored by the Animikie Group: Pokegama Formation, Biwabik Minnesota Ground Water Association. Laurel Reeves, Iron Formation, and Virginia Formation, Eastern Minnesota Dept. of Natural Resources, laurel.reeves@dnr. Mesabi Range, and the Thomson Formation near state.mn.us; Harvey Thorleifson, Minnesota Geological Duluth. Sat., May 21–Sun., May 22. Richard Ojakangas, Survey, [email protected]; Martin Saar, University of University of Minnesota–Duluth, [email protected]; Minnesota, [email protected]. Mark Severson, Natural Resources Research Institute; G.B. 4. Lakes—Glacial Lakes, Large Lakes, Small Lakes, Morey, Minnesota Geological Survey; Peter Jongewaard, Groundwater Interaction. Cosponsored by GSA United Taconite; John Arola, Ispat Inland Mining; Joel Limnogeology Division and GSA Sedimentary Geology Evers, Cliffs Mining; Doug Halvorson, Northshore Mining; Division. Emi Ito, University of Minnesota, [email protected]; T.B. Holst, University of Minnesota–Duluth. This trip Steven Colman, University of Minnesota, scolman@d. will allow participants to study the formations of the umn.edu. Animikie Group on the Mesabi Iron Range: the basal 5. The Midcontinent Rift in the Region: siliciclastic Pokegama Formation, the overlying (1878 Ma) A Modern Integration of a Century of Studies. Biwabik Iron Formation, and the upper unit, the Virginia Cosponsored by GSA Sedimentary Geology Division. Jim Formation. Evidence suggesting a tidally influenced envi- Miller, Minnesota Geological Survey, [email protected]; ronment of deposition for the Pokegama Formation and Bill Cannon, U.S. Geological Survey, wcannon@usgs. the Biwabik Iron Formation, including possible bimodal- gov; Mike Easton, Ontario Geological Survey, mike. bipolar cross bedding and stromatolites, will be observed. [email protected]. Significant members of both formations will be visited, Theme Sessions generally in stratigraphic sequence. The lowest part of 1. Arsenic in Drinking Water. Randal Barnes, University the turbiditic Virginia Formation, the equivalent Thomson of Minnesota, [email protected]; Mindy Erickson, Formation, and twice-folded older pre-Animikie rocks University of Minnesota, [email protected]. will be the final stops. Cost: $185. 2. Developing Approaches to Terrestrial 12. Pre-Wisconsinan and Wisconsinan Glacial Paleoclimatology. Cosponsored by GSA Sedimentary Stratigraphy, History, and Landscape Evolution, Geology Division and the Great Lakes Section of the Western Wisconsin. Sat., May 21–Sun., May 22. Society for Sedimentary Geology. Greg Ludvigson, Iowa Kent Syverson, University of Wisconsin–Eau Claire, Geological Survey, [email protected]; Jeff [email protected]; Robert Baker, University of Dorale, University of Iowa, [email protected]. Wisconsin–River Falls; Steve Kostka, University 3. Evolution of Crustal Melts. Jim Stout, University of of Wisconsin–Madison; Mark Johnson, University Minnesota, [email protected]; Jim Grant, University of Göteborg, Sweden. This trip will focus on pre- of Minnesota–Duluth, [email protected]. Wisconsinan and Wisconsinan glacial stratigraphic units 4. Forensics in Environmental Geology. Keith in western Wisconsin and will introduce some new ideas Rapp, Unisys Corporate Environmental Affairs, keith. about Quaternary stratigraphy, chronology, and land- [email protected]; Carolyn Boben, Xcel Energy, carolyn. form development. This two-day trip will begin in the [email protected]. late Wisconsinan St. Croix moraine in western St. Croix 5. Geologic Development of Midwestern Fluvial & County and will work down-section in subsequent stops Glaciofluvial Systems. Cosponsored by GSA Sedimentary in the eastern portion of the county as well as Dunn and Geology Division. Curtis Hudak, Foth & Van Dyke and Chippewa Counties. The trip will culminate with stops in the Chippewa moraine. Cost: $165.

18 FEBRUARY 2005, GSA TODAY Associates, Inc., [email protected]; Ed Hajic, Illinois State Museum, [email protected]. 6. Geologic Development of the 2005 GSA Section Meetings Mississippi River. Cosponsored by GSA Sedimentary Geology Division. Howard Hobbs, Minnesota Geological Survey, [email protected]; Tammy Rittenour, Lund University, Tammy. [email protected]. NORTHEASTERN SECTION 7. Issues in Undergraduate March 14–16, 2005 Geoscience Education: Geology Prime Hotel and Conference Center, Saratoga Springs, New York and Citizenship, Developing Information: Kurt Hollocher, Union College, Department of Geology, Olin Building, Quantitative Skills, Preparing Nott Street, Schenectady, NY 12308-3107, (518) 388-6518, [email protected] Teachers to Teach Earth Science, Bringing Research on Learning to the Geosciences. Mary Savina, SOUTHEASTERN SECTION Carleton College, msavina@carleton. March 17–18, 2005 edu; Cathy Manduca, Carleton College, Grand Casino Biloxi, Biloxi, Mississippi [email protected]. Information: Gail Russell, University of Southern Mississippi, Department of Geology, 8. Innovations in Paleontological Box 5044, Hattiesburg, MS 39406-2000, (601) 266-4077, [email protected] Methods: Geochemistry in Paleobiology: New Systems, New Substrates, New Techniques; Novel SOUTH-CENTRAL SECTION Insights into Terrestrial and Marine April 1–2, 2005 Depositional Systems through Trinity University, San Antonio, Texas Taphonomy and Ichnology. Information: Diane Smith, Trinity University, Department of Geosciences, #45, Cosponsored by GSA Sedimentary One Trinity Place, San Antonio, TX 78212-4674, (210) 999-7656, [email protected] Geology Division and the Great Lakes Section of the Society for Sedimentary Geology. David Fox, CORDILLERAN SECTION University of Minnesota, dlfox@umn. ( meeting with American Association of Petroleum Geologists) edu; Tim Demko, University of April 29–May 1, 2005 Minnesota, [email protected]; Fairmont Hotel, San José, California Ray Rogers, Macalester College, Information: Jonathan Miller, San José State University, Department of Geology, [email protected]. 1 Washington Square, San José, CA 95192-0102, (408) 924-5015, [email protected] 9. Inquiry-Based, Hands-on, Classroom Exercises, Lab NORTH-CENTRAL SECTION Demonstrations, and Field May 19–20, 2005 Investigations in Geoscience Education. Cosponsored by the University of Minnesota, Minneapolis, Minnesota Central Section of the National Abstract Deadline: February 22, 2005 Association of Geoscience Teachers. Information: Carrie Jennings Patterson, University of Minnesota, Minnesota Geological Survey, Kate Pound, St. Cloud State 2642 University Ave. W., St. Paul, MN 55114-1032, (612) 627-4780, ext. 220, [email protected], University, kspound@stcloudstate. or Barbara Lusardi, University of Minnesota, Minnesota Geological Survey, 2642 University Ave. W., edu; Megan Jones, North Hennepin St. Paul, MN 55114-1032, (612) 627-4780, ext. 212, [email protected] Community College, Mjones@nhcc. edu; Lee Schmitt, Hamline University, ROCKY MOUNTAIN SECTION [email protected]. Special require- May 23–25, 2005 ments: Each presenter must be able to Mesa State College, Grand Junction, Colorado show a classroom activity, demonstra- Abstract Deadline: February 22, 2005 tion, or investigation Friday afternoon Information: Rex Cole, Mesa State College, Department of Physical & Environmental Science, in a “hands-on” area that will be tied to this session and to a workshop on 1100 North Ave., Grand Junction, CO 81501-3122, (970) 248-1599, [email protected] hands-on activities and demonstrations for K–12 educators. Presenters should also submit a brief summary of their activity or demonstration for publica- www.geosociety.org/sectdiv/sections.htm tion on the Web.

GSA TODAY, FEBRUARY 2005 19 10. Integrating Real and Virtual Field Trips in K–16 edu; Emi Ito, University of Minnesota, [email protected]. Geoscience Education. Cosponsored by the Central LRC Core Facility, 672 Civil Engineering, University of Section of the National Association of Geoscience Minnesota. Max.: 12. Cost: $20. Teachers. Cinzia Cervato, Iowa State University, 4. Roy J. Shlemon Mentor Program in Applied [email protected]; Rusty Low, University of Minnesota, Geoscience. Sponsored by GSA Foundation. Thurs., [email protected]. May 19, and Fri., May 20, 11:30 a.m.–1 p.m.; location 11. Landscape Development. Lesley Perg, University of available at GSA’s registration desk. Karlon Blythe, Minnesota, [email protected]; Kelly MacGregor, Macalester [email protected]. Lunch provided. This interactive College, [email protected]. and informative program for undergraduate and graduate 12. Mid-Continental Quaternary History in a Global students, led by professional geoscientists, will cover real Context. Greg Balco, University of Washington, balcs@ life issues including professional opportunities and chal- u.washington.edu; Carrie Jennings, Minnesota Geological lenges that await students after graduation. Plan to attend Survey, [email protected]. both free luncheons to hear different presenters each 13. New Geoscience Applications for Advanced day. Students will receive FREE LUNCH tickets in their Visualization Methods, 3-D, Web-Access, and Large registration packet to attend both Shlemon Programs. Databases. Paul Morin, University of Minnesota, However, space is limited. First come, first served. [email protected]; Emi Ito, University of Minnesota, 5. The John Mann Mentors in Applied Hydrogeology [email protected]; Harvey Thorleifson, Minnesota Geological Program. Sponsored by GSA Foundation. Thurs., Survey, [email protected]. May 19, 5–6:30 p.m. Meeting location information 14. Precious Metals: PGE & Au in Precambrian Terranes available at GSA’s registration desk. Karlon Blythe, of the Lake Superior Region. Jim Miller, Minnesota [email protected]. Refreshments provided. This Geological Survey, [email protected]; Dean Peterson, early evening event presents mentoring opportunities Natural Resources Research Institute, dpeters1@nrri. for undergraduate and graduate students and recent umn.edu. graduates with declared interest in applied hydrogeol- 15. Soils as Keys to Quaternary Geology and ogy as a career to interact and network with practicing Landscapes. Randall Schaetzl, Michigan State University, hydrogeology professionals. This program is a focused, [email protected]; Joe Mason, University of Wisconsin, small-scale event that features FREE FOOD for partici- [email protected]. pants. Participant eligibility is limited to those students 16. Unconventional Natural Gas Resources Associated who have declared their career interest to be hydrology with Glacial Deposits—Shallow Bedrock Gas or hydrogeology on their GSA membership applications and Drift Gas. George Shurr, GeoShurr Resources, and who have registered online for this section meeting. [email protected]; Derric Iles, South Dakota An e-mail invitation will then be sent to those qualified Geological Survey, [email protected]. students. Keep in mind that only a quick response to the 17. Undergraduate Research in the Geosciences (Poster invitation will secure you a seat, as attendance at this Session). Sponsored by the Council on Undergraduate Mann Mentors event is limited! Research. Robert Shuster, University of Nebraska–Omaha, SPECIAL EVENTS [email protected]; Karen Fryer, Ohio Wesleyan • Welcome Reception. Wed., May 18, 7–9 p.m., Hubert H. University, [email protected]; David Matty, Central Humphrey Room. Michigan University, [email protected]. • North Central GSA Management Board Breakfast and Workshops Business Meeting. Thurs., May 19, 7–9 a.m. Invitation 1. Magnetic Techniques in Environmental only. Reconstruction. Wed., May 18, 1–5 p.m., Institute • Central Section National Association for Geoscience for Rock Magnetism, 291 Shepphard Labs, Univ. of Teachers (NAGT) Luncheon and Business Meeting. Minnesota. Subir Banerjee, University of Minnesota, Thurs., May 19, noon–1 p.m. Cost: $16.50. [email protected]; Mike Jackson, University of • National Association for Geoscience Teachers Bash Minnesota, [email protected]. Max: 12. Cost: $20. and Business Meeting. Entertainment and dinner fare 2. Workshop for Teachers: Inquiry-based, Hands-on, provided. Thurs., May 19, 7–9 p.m. Reservation required. Classroom Exercises, Lab Demonstrations, and Field Cost: Professional, $15; Student, $5. Investigations in Geoscience Education. Cosponsored • Opportunities in Earth Science for All Americans. by the Central Section of the National Association of Sponsored by the Association for Women Geoscientists. Geoscience Teachers. Fri., May 20, 8 a.m.–5 p.m. Kate Invited speaker Marilyn Suiter. Fri., May 20, noon–1 p.m. Pound, St. Cloud State University, kspound@stcloudstate. No cost, but reservations required. edu; Megan Jones, North Hennepin Community College, GUEST ACTIVITIES [email protected]; Lee Schmitt, Hamline University, The Twin Cities offer a variety of activities including muse- [email protected]. Cost: $25. ums, theaters, shops, parks, gardens, and riverboat tours. The 3. Description and Characterization of Lake Sediment local planning committee has compiled a list of activities and Cores: A Hands-on Workshop. Wed., May 18, 1–5 p.m. attractions. For information on these and other activities, visit Amy Myrbo, University of Minnesota, amyrbo@umn. http://talc.geo.umn.edu/conference/.

20 FEBRUARY 2005, GSA TODAY STUDENT TRAVEL The North-Central Section and the GSA New from 2 Foundation have made travel grants available for students who are presenting oral or poster SOILS IN ARCHAEOLOGICAL papers. Students must be currently enrolled and RESEARCH must be members of the relevant section to ap- Vance T. Holliday ply for support. For more information, contact This book is a discussion of the study of R.F. Diffendal, Jr., executive secretary, North- soils as a component of earth science applications in archaeology, a subdisci- Central Section, [email protected]. pline known as geoarchaeology. The vol- ume focuses on how the study of soils STUDENT AWARDS can be integrated with other aspects of Awards will be given for best student oral archaeological and geoscientific research (undergraduate or graduate) and poster (un- to answer questions regarding the past. dergraduate only) presentations. To be eligible, Anyone who needs to know how soils can be used to help answer archaeological students must be lead authors and presenters, CONTINENTS AND questions will be interested in this work. and they should clearly identify their abstracts John J. W. Rogers and M. Santosh 2004 464 pp.; 111 halftones & line illus. 0-19-514965-3 $115.00 as student work. To this day, there is a great amount of EXHIBITS controversy about where, when and how GEOLOGY AND HEALTH the so-called supercontinents—Pangea, Booths and table space will be available in Closing the Gap Godwana, , and Columbia—were Edited by H. Catherine W. Skinner and the Hubert H. Humphrey Room near the made and broken. Continents and Antony R. Berger Supercontinents frames that controversy poster sessions. Contact Peter McSwiggen, “More than a simple compilation of arti- McSwiggen and Associates, (612) 781-2282, by giving all the necessary background on how continental crust is formed, modi- cles, this reference text reads quite [email protected]. fied, and destroyed, and what forces move well...it prompts the reader to consider plates. the broad impact of geological parame- ACCOMMODATIONS ters with health issues that may be 2004 304 pp.; 29 halftones & 161 line illus. The Radisson Hotel Metrodome provides an 0-19-516589-6 $74.50 encountered...a useful addition to the ideal venue for the 2005 GSA North-Central library of the practicing industrial hygienist.” Section meeting. With over 20,000 square feet APPLIED STOCHASTIC —Applied Occupational and Environmental Hygiene of meeting space, all of the GSA technical ses- HYDROGEOLOGY sions, exhibits, posters, and functions will be Yoram Rubin 2003 192 pp.; 9 halftones & 41 line illus 0-19-516204-8 $75.00 centrally located. Situated on the University of “Practitioners, researchers, professors, Minnesota East Bank campus, the hotel is con- and graduate students in hydrogeology THE PHANEROZOIC and engineering will find that this book is veniently close to the University of Minnesota intuitive, valuable, and applicable... CO2 and O2 facilities and to both the downtown Minneapolis Applied Stochastic Hydrogeology is Robert A. Berner and St. Paul shopping, entertainment, and unique and the most comprehensive The Phanerozoic Carbon Cycle applies business districts. GSA participants are reference book on this subject. It covers the fundamental and practical aspects of an earth system science approach to the strongly encouraged to stay at the conference geostatistics and stochastic hydrogeology study of the long-term carbon cycle, headquarters for easy access to all GSA activi- with many examples, case studies, and which involves the transfer of carbon ties. Reserve through www.radisson.com/gsa guidelines for applications.” between rocks and the atmosphere, oceans, and life. Theoretical modeling is to receive the special GSA rate of $105 for sin- —EOS 2003 416 pp.; 108 line illus & halftones used to calculate how levels of atmos- gle/double occupancy ($15 extra per addi- 0-19-513804-X $94.50 pheric CO2 and O2 have changed over the tional adult). past 550 million years. 2004 158 pp.; 1 halftone, 49 line illus. ADDITIONAL INFORMATION 0-19-517333-3 $89.50 Requests for additional information should Prices are subject to change and apply only in the US. To order, please be addressed to the general chairs, Carrie call 1-800-451-7556. In Canada, call 1-800-387-8020. Jennings, [email protected], or Barbara Lusardi, Never miss an Oxford sale! Visit our web site at www.oup.com/us. 3 Satisfaction Guaranteed or your money back. [email protected], (612) 627-4780, Minnesota Geological Survey, 2642 University Avenue, St. Paul, MN 55114, USA.

GSA TODAY, FEBRUARY 2005 21 STUDENTS—Mark Your Calendars!

Students: Plan now to attend a Shlemon Mentor Program each Shlemon Program. However, space is limited. First and/or a Mann Mentor Program in Applied Hydrogeology at come, first served. your 2005 Section Meeting to chat one-on-one with practic- ing geoscientists. These volunteers will answer your ques- And, it gets better: FREE light suppers will be served tions and share insights on how to get a job after graduation. (students only) at the Mann Mentor Programs. The Mann When programs are scheduled for multiple days, each day’s Programs are specific to careers in hydrogeology; if you’re program will offer a different set of mentors. interested in receiving an invitation to attend the Mann Program for a FREE light supper after the tech sessions FREE LUNCHES will be served (students only) at the end, contact Karlon Blythe, [email protected]. Be sure Shlemon Mentor Programs. Students will receive a FREE to indicate which Section Meeting you plan to attend. LUNCH ticket, along with their registration badge, to attend

Mentor Programs for 2005 Section Meetings

FOR LOCATIONS OF PROGRAMS, ASK AT THE GSA REGISTRATION DESK.

NORTHEASTERN SECTION MEETING CORDILLERAN SECTION MEETING Saratoga Springs, New York San José, California SHLEMON MENTOR LUNCHEON PROGRAMS: SHLEMON MENTOR LUNCHEON PROGRAMS: Mon. and Tues., March 14–15, 11:30 a.m.–1 p.m. Fri. and Sat., April 29–30, 11:30 a.m.–1 p.m. MANN MENTORS IN APPLIED MANN MENTORS IN APPLIED HYDROGEOLOGY PROGRAM: HYDROGEOLOGY PROGRAM: (by invitation; contact [email protected]) (by invitation; contact [email protected]) Mon., March 14, 5–6:30 p.m. Fri., April 29, 5–6:30 p.m.

SOUTHEASTERN SECTION MEETING NORTH-CENTRAL SECTION MEETING Biloxi, Mississippi Minneapolis, Minnesota SHLEMON MENTOR LUNCHEON PROGRAMS: SHLEMON MENTOR LUNCHEON PROGRAMS: Thurs. and Fri., March 17–18, 11:30 a.m.–1 p.m. Thurs. and Fri., May 19–20, 11:30 a.m.–1 p.m. MANN MENTORS IN APPLIED MANN MENTORS IN APPLIED HYDROGEOLOGY PROGRAM: HYDROGEOLOGY PROGRAM: (by invitation; contact [email protected]) (by invitation; contact [email protected]) Thurs., March 17, 5–6:30 p.m. Thurs., May 19, 5–6:30 p.m.

SOUTH-CENTRAL SECTION MEETING ROCKY MOUNTAIN SECTION MEETING San Antonio, Texas Grand Junction, Colorado SHLEMON MENTOR LUNCHEON PROGRAM: SHLEMON MENTOR LUNCHEON PROGRAMS: Fri., April 1, 11:30 a.m.–1 p.m. Mon. and Tues., May 23–24, 11:30 a.m.–1 p.m. MANN MENTORS IN APPLIED MANN MENTORS IN APPLIED HYDROGEOLOGY PROGRAM: HYDROGEOLOGY PROGRAM: (by invitation; contact [email protected]) (by invitation; contact [email protected]) Fri., April 1, 5–6:30 p.m. Mon., May 23, 5–6:30 p.m.

For more information contact [email protected]

22 FEBRUARY 2005, GSA TODAY Final Announcement and Call for Papers

electronically, contact Nancy Carlson, 303-357-1061, [email protected]. ROCKY MOUNTAIN REGISTRATION Standard Registration Deadline: April 18, 2005 57th Annual Meeting Cancellation Deadline: April 25, 2005 Rocky Mountain Section, GSA GSA Headquarters will handle registration. Registration de- Mesa State College, Grand Junction, Colorado tails are available on the Web at www.geosociety.org. To ob- tain lower registration fees and to assist planning by the local May 23–25, 2005 committee, please register online at www.geosociety.org/ www.geosociety.org/sectdiv/rockymtn/05rmmtg.htm sectdiv/rockymtn/05rmmtg.htm, or download the PDF regis- tration form. If you are unable to preregister this way, contact GSA Sales and Service, (303) 357-1000 option 3, 1-888-443- The 57th Annual Meeting of the Rocky Mountain Section 4472, or [email protected]. will be hosted by the geology program within the All requests for registration changes or cancellations must Department of Physical and Environmental Sciences, Mesa be made in writing and received by April 25, 2005. No re- State College. The meeting will be held on the campus of funds will be made after this date. Mesa State College. On-site registration will be in the W.W. Campbell College ENVIRONMENT Center: Located in Grand Junction, Colorado, Mesa State College is Sunday, May 22 3–8 p.m. a medium-sized (6000 students) liberal arts college. Grand Monday, May 23 7:30 a.m.–4 p.m. Junction (area population of 116,000) is the largest city in Tuesday, May 24 7:30 a.m.–4 p.m. western Colorado, located roughly halfway between Denver Wednesday, May 25 7:30–10 a.m. and Salt Lake City. The high desert climate (elevation 4600 Registration Fees feet) is typically mild and sunny during May, perfect for the Standard On-site scheduled field trips. Local geological attractions include Full meeting One day Full meeting One day Colorado National Monument, the Book Cliffs, Unaweep Professional Member $125 $85 $135 $95 Canyon, Dinosaur Journey Museum, Riggs Hill and Dinosaur Professional Member $95 $55 $105 $65 Hill Outdoor Museums, Rabbit Valley Dinosaur Quarry, and (70 and older) the Museum of Western Colorado. Within a two-hour drive Professional Nonmember $135 $95 $145 $105 are Arches National Park, Canyonlands National Park, the Student or Associate Member $75 $65 $80 $70 Black Canyon of the Gunnison National Park, and Dinosaur Student Nonmember $85 $75 $90 $80 National Monument. K–12 Professional $40 $30 $45 $35 Guest or Spouse $25 $15 $30 $20 GETTING THERE Field Trip/Workshop only $25 $25 $25 $25 Grand Junction is an easy destination. Major highways pass- ing through the city include Interstate 70 and U.S. Highway ACCESSIBILITY 50. Driving time from Denver is about four hours (250 miles), GSA is committed to making its meetings accessible to all and from Salt Lake City, it is about 4.5 hours (275 miles). people interested in attending. Indicate special requirements Commuter airline service is available from America West (wheelchair accessibility, etc.) on the registration form. Mesa Express via Phoenix, SkyWest from Salt Lake City, and State College is ADA compliant. Frontier Airlines, Great Lakes Airlines, and United Express/ FIELD TRIPS SkyWest from Denver. For more information regarding air ser- For additional information regarding field trips, please con- vice, see www.walkerfield.com. Greyhound Lines and Amtrak tact either the trip leader or the field trip chair, Gigi Richard, also serve Grand Junction. (970) 248-1689, [email protected]. Complete descrip- Most hotels and motels are located on Horizon Drive, tions are posted at www.geosociety.org/sectdiv/rockymtn/ which is about 2.3 miles from Mesa State College. Public 05rmmtg.htm. A compilation of field trip handouts will be transportation (Grand Valley Transit) is available. Contact available for purchase at the time of the meeting. www.grandvalleytransit.com for more information. A map of Grand Junction can be downloaded from www. Premeeting visitgrandjunction.com, and maps of Mesa State College and 1. Geological History of the Uncompahgre and surrounding areas can be downloaded from www.mesastate. Unaweep Canyon: From Penn-Permian Glaciers edu/main/maps/. to Plio-Pleistocene . Two days, Sat. and Sun., May 21–22. Andres Aslan, Mesa State College, ABSTRACTS (970) 248-1614, [email protected]; William Hood, Abstract Deadline: February 22, 2005 Mesa State College; Lynn Soreghan, University of Abstracts for all sessions should be submitted online at Oklahoma; Michael Blum, Louisiana State University; www.geosociety.org. If you cannot submit your abstract

GSA TODAY, FEBRUARY 2005 23 Rick Livaccari, Mesa State College. Max.: 23; min.: 15. box lunch, and transportation (van). This field trip will Cost: Professionals, $140; students $35 (maximum of 10). involve hiking and climbing. Includes guidebook, two box lunches, and transportation A prominent, Laramide-age strike-slip structure, called in vans. Note: Lodging not included. This field trip will the Cactus Park–Bridgeport fault, has recently been iden- involve some hiking and climbing. tified and mapped in the northern Uncompahgre Plateau. Since the early surveys of the western United States, The Cactus Park–Bridgeport fault is a continuous, subver- geologists have puzzled over enigmatic Unaweep tical, oblique-slip fault with a predominance of left-lateral Canyon. This two-day field trip will discuss possible ori- strike-slip and lesser amounts of reverse dip-slip. This gins of the canyon ranging from Cenozoic incision by the field trip will focus on field assessment of the kinematic Colorado and Gunnison Rivers to late Paleozoic glacia- nature of the Cactus Park–Bridgeport fault. Spectacular tion. Day 1 will emphasize late Cenozoic fluvial incision, outcrops will be visited. formation of the Cactus Park Lake, stream piracy, and Concurrent possible late Quaternary deformation. Day 2 will focus 5. Viniculture Geology and Biology of the Grand on emerging evidence for a late Paleozoic glacial origin Valley, Colorado. Half-day, Mon. afternoon, May 23. for Unaweep’s inner gorge and new interpretations for Harold (Skip) Hase, Mesa State College, (970) 248-1161, the proximal Cutler Formation facies exposed at the can- [email protected]; Larry Madsen, Mesa State College; yon’s western end. Rick Ballard, Mesa State College. Max.: 20; min.: 13. Cost: 2. Dinosaur Quarries of Western Colorado and Eastern $35, includes guidebook, wine tasting, and transportation Utah. Two days, Sat. and Sun., May 21–22. John in vans. This trip involves a moderate amount of walking. Foster, Museum of Western Colorado, (970) 858-7282, This is a half-day field trip focused on the wine indus- [email protected]; Rod Scheetz, Brigham Young try in the Grand Valley from Palisade to Fruita, Colorado. University; James Kirkland, Utah Geological Survey. Max.: The trip will look at vineyards and growing conditions 20; min.: 13. Cost: $170, includes guidebook, one night through the valley and look at the wine making process accommodation (double occupancy) in Moab, Utah, from harvesting to crushing to fermentation and aging, two box lunches, and transportation in vans. Hiking and with a complete tour through a winery from start to finish moderate climbing can be expected. (tasting is part of the process). In Colorado, you must be Tour of dinosaur localities in the Upper Jurassic 21 years of age to consume alcohol. Morrison Formation and the Lower Cretaceous Cedar 6. National Monument. Half-day, of western Colorado and east- Tues. afternoon, May 24. William Hood, Mesa State ern Utah. Stops Saturday will include the Fruita College, (970) 241-8020, [email protected]. Max.: Paleontological Area, one of the most important Jurassic 20; min.: 13. Cost: $30, includes geologic map, light microvertebrate localities in the world; the Mygatt-Moore refreshments, and transportation in vans. Hiking and Quarry, type locality of both Mymoorapelta, the first moderate climbing can also be expected. Jurassic ankylosaur found in North America, and the Colorado National Monument, located on the out- palaeoniscoid fish Morrolepis; and the Fisher Mesa track- skirts of Grand Junction, is a truly memorable locale for site, a locality with dozens of deep, large theropod tracks Colorado Plateau geology. This nontechnical half-day in the Entrada Sandstone. After a night in Moab, Sunday’s trip will explore the geology, history, and scenery of the stops will be the Dalton Wells Quarry, a site at the base monument from a variety of perspectives. This is an ideal of the Cedar Mountain Formation and one of the most trip for spouses, guests, and K–12 educators. Bring your productive quarries in the formation, and the Gaston camera and plenty of film (memory). Quarry, a site that produced the ankylosaur Gastonia and 7. The DeBeque Canyon Landslide, Interstate 70, the type specimen of Utahraptor. Milepost 51. Half-day, Wed. afternoon, May 25. Jonathan 3. Colorado River Raft Trip, Grand Junction to L. White, Colorado Geological Survey, Denver, (303) Westwater. Three days, Fri.–Sun., May 20–22. John 866-3551, [email protected]. Max.: 20; min.: 13. Pitlick, University of Colorado, Boulder, (303) 492-5906, Cost: $40, includes guidebook, refreshments, and trans- [email protected]. Max.: 18; min.: 12. Cost: $345, portation in vans. Note: In the event of wet conditions, a includes guidebook, raft guides and equipment, three short, strenuous hike will be necessary. lunches, two dinners, two breakfasts, and transportation The landslide of DeBeque Canyon is about 20 miles in vans. Note: This trip involves overnight camping in a (32 km) east of Grand Junction, near milepost 51 of remote canyon and rafting through class III and possibly Interstate 70. The active landslide complex, on the class IV rapids depending on water levels. Hiking and south wall of a 500-ft-deep (152 m) canyon cut into the moderate climbing can also be expected. Cretaceous Williams Fork Formation, has several failure 4. Laramide Strike-Slip Faulting along the Cactus mechanisms, including near-horizontal block gliding, Park–Bridgeport Fault of the Uncompahgre Plateau. both translational and rotational shear modes, and top- One day, Fri., May 20. Rick Livaccari, Mesa State College, pling rockfall. Striking features of this slide are a rubble (970) 248-1081, [email protected]; John Hodge, zone of house-sized sandstone blocks and deep fissures Mesa State College. Max.: 13; min.: 8. Cost: Professionals, above the canyon rim. The landslide has a history of $75; students $25 (maximum of 5). Includes map, one recent movements (e.g., 1998) that have diverted the

24 FEBRUARY 2005, GSA TODAY Colorado River channel and impacted the highway and 11. Stratigraphy, Sedimentology, and Energy Resources railway corridors on the valley floor. This field trip will of Cretaceous Rocks in the Book Cliffs Area, Western visit the landslide from the plateau above, so no strenu- Colorado and Eastern Utah. Two days, Thurs. and Fri., ous hiking is needed. At several vantage points along May 26–27. Rex Cole, Mesa State College, (970) 248-1599, the fissures and looking down on the rubble and canyon [email protected]; Mark Kirschbaum, U.S. Geological floor, we will discuss the history and age of the landslide, Survey, Denver; Robert G. Young, consulting geologist. the ongoing monitoring program and current rates of Max.: 23; min.: 15. Cost: $190, includes guidebook, two movement, failure mechanisms, and the water-diversion box lunches, and transportation in 4 × 4 vehicles. Note: construction project completed in 2003. Lodging not included. This trip involves a significant Postmeeting amount of hiking and climbing over uneven ground. 8. The Uravan Mineral Belt. One day, Thurs., May 26. This two-day field trip will provide a general overview William Chenoweth, retired U.S. Department of Energy of Upper Cretaceous marine, marginal-marine, coastal- Geologist, Grand Junction, (970) 242-9062, cheno@ plain, and alluvial-plain strata exposed in the Book Cliffs earthlink.net; Craig S. Goodknight, S.M. Stoller Corp., of eastern Utah and western Colorado, including the Grand Junction; Edward T. Cotter, S.M. Stoller Corp., Castlegate Sandstone, Sego Sandstone, Neslen Formation, Grand Junction; Richard D. Dayvault, S.M. Stoller Corp., Farrer Formation, Tuscher Formation, Iles (Mount Grand Junction. Max.: 20; min.: 13. Cost: $60, includes Garfield) Formation, and Williams Fork (Hunter Canyon) guidebook, box lunch, and transportation in vans. This Formation. During the field stops, emphasis will be on trip involves a moderate amount of hiking and climbing. lithostratigraphic characteristics, sequence-stratigraphic Since the beginning of the twentieth century, the ura- relationships, depositional facies, and energy resources nium-vanadium deposits in the Salt Wash Member of the (coal and natural gas). Morrison Formation in southwestern Colorado have been TECHNICAL PROGRAM mined for radium, vanadium, and uranium. The area is Technical sessions will generally be 12 minutes long with considered the birthplace of the Atomic Age. This trip three minutes for questions. Some sessions may use a longer will examine mining areas in the Uravan and Paradox format. Only digital media presentations (PowerPoint) will be Valley areas, reclaimed millsites, and disposal cells. allowed (sorry, no slides or overheads). Because a centralized 9. Canyons of the Eastern Uinta Mountains, Dinosaur computer system (PC based) will be used, speakers will not National Monument, Raft Trip, Green River. Four be allowed to use their own laptops. Poster sessions will be days, Thurs.–Sun., May 26–29. Jack Schmidt, Utah State held in Liff Auditorium (W.W. Campbell College Center). University, (435) 797-1791, [email protected]. Max.: Poster space will be 4' × 8'. A limited number of tables will 18; min.: 12. Cost: $550, includes guidebook, raft guides also be available upon request. Authors are required to be and equipment, four lunches, three dinners, three break- present for at least two hours during the day. fasts, and transportation in vans. Note: This trip involves Complete descriptions of the symposia and theme sessions overnight camping in a remote canyon and rafting are posted at www.geosociety.org. For additional information, through class III and possibly class IV rapids depending contact technical program co-chairs Andres Aslan, (970) 248- on water levels. Hiking and moderate climbing can also 1614, [email protected], or Rick Livaccari, (970) 248-1081, be expected. [email protected]. 10. Upheaval , (?), San Rafael Swell, SYMPOSIA and White Canyon Areas, Utah: Evidence Supporting 1. Water Resources in the Colorado River Basin and the a Major Bolide Impact Event Horizon near the Western U.S. Robert Ward, Colorado State University, (970) Permian-Triassic Boundary. Two days, Thurs. and Fri., 491-6308, [email protected]; Gigi Richard, Mesa May 26–27. Joe Fandrich, Mesa State College, (970) 256- State College, (970) 248-1689, [email protected]. 9029, [email protected]; Jared Morrow, University 2. Selenium-Sodium-Salinity-Sediment in the Upper of Northern Colorado. Max.: 20; min.: 13. Cost: $210, Colorado River Basin: Origins and Impacts. Richard includes guidebook, one night lodging (single occu- Grauch, U.S. Geological Survey, Denver, (303) 236-5551, pancy) in Hanksville, Utah, two box lunches, and trans- [email protected]; Paul von Guerard, U.S. Geological portation in vans. This trip involves a moderate amount Survey, Grand Junction, (970) 245-5257, pbvongue@ of hiking and climbing. usgs.gov. Day 1 includes travel to Upheaval Dome, an eroded 3. Buried Riches to Hazardous Wastes—Western impact crater (?), and the San Rafael Swell. We will visit Colorado’s Uranium Legacy. Bill Chenoweth, retired, impact-generated (?) seismite/tsunamites in a breccia U.S. Dept. of Energy, (970) 242-9062, cheno@earthlink. at the base of the Black Dragon Shale and sedimen- net; Craig Goodknight, S.M. Stoller Corp., (970) 248-6550, tary dikes and convoluted beds in the lower Entrada [email protected]. Sandstone, which are attributed to the Upheaval Dome 4. Bolide Impact Characteristics, Event Horizons, impact. Day 2 will involve travel to the White Canyon and Impact Structures in Western North America area to visit impact-generated seismite/megatsunamites and Beyond. Joe Fandrich, Mesa State College, in the upper Hoskinnini Member of the Moenkopi (970) 256-9029, [email protected]; Jared Morrow, Formation.

GSA TODAY, FEBRUARY 2005 25 University of Northern Colorado, (970) 351-2483, 11. Council on Undergraduate Research— [email protected]. Undergraduate Research Poster Session. Kim 5. Mudslide Mania—Characteristics and Geologic Hannula, Ft. Lewis College, (970) 247-7463, hannula_ Investigations of Debris Flows and Alluvial Fans in [email protected]. the Rocky Mountain Region. David Noe, Colorado 12. Late Paleozoic Geology of Western Pangaea: Geological Survey, (303) 866-2432, [email protected]; The Greater Ancestral Rocky Mountains. Chuck Paul Santi, Colorado School of Mines, (303) 273-3108, Kluth, Colorado School of Mines, (303) 904-3889, [email protected]. [email protected]; Lynn Soreghan, University of THEME SESSIONS Oklahoma, (405) 325-4482, [email protected]. 1. Sustainability of Groundwater Resources of the 13. Incorporating Undergraduate Research into the Colorado Plateau. Kenneth Kolm, Blasland, Bouck & Curriculum. C. Frederick Lohrengel II, Southern Lee, (303) 231-9115, [email protected]. Utah University, (435) 586-7941, [email protected]; 2. The Colorado River System: Hydrology and Fluvial Robert L. Eves, Southern Utah University, (435) 586- Processes. Gigi Richard, Mesa State College, (970) 248- 1934, [email protected]; Mark R. Colberg, Southern Utah 1689, [email protected]; John Pitlick, University of University, (435) 586-8331, [email protected]. Colorado, Boulder, (303) 492-5906, [email protected]. WORKSHOPS edu. Introduction to Geographic Information Systems (GIS) 3. Selenium-Sodium-Salinity-Sediment in the Upper and Global Positional Systems (GPS). Two days, Sat. and Colorado River Basin: Origins and Impacts. Richard Sun., May 21–22. Ann B. Johnson, Environmental Systems Grauch, U.S. Geological Survey, Denver, (303) 236-5551, Research Institute (ESRI), [email protected]; Dave Fosdek, [email protected], Paul von Guerard, U.S. Geological ESRI; Verner Johnson, Mesa State College. This course will in- Survey, Grand Junction, (970) 245-5257, pbvongue@ troduce the use of GIS in geology-related applications using usgs.gov. ArcGIS, ArcMap, ArcCatalog, and Spatial and 3D Analyst ex- 4. Late Cenozoic Evolution of the Rocky Mountains tensions. Experience with ArcGIS is not necessary, but famil- and Colorado Plateau. Eric Leonard, Colorado College, iarity with Windows OS would be beneficial. Focus will be (719) 389-6513, [email protected]; hands-on use of ArcGIS, including ModelBuilder, data access Andres Aslan, Mesa State College, (970) 248-1614, and analysis, Geoprocessing with ArcTools, and the [email protected]; Karl Karlstrom, University of New Geodatabase. Max.: 20; min.: 10. Cost: Professionals, $125; Mexico, (505) 277-4346, [email protected]. students $80. Includes instructional materials and refresh- 5. Precambrian Geology of Western Colorado. Karl ments. Karlstrom, University of New Mexico, (505) 277-4346, Roy J. Shlemon Mentor Program in Applied Geology. [email protected]. Sponsored by GSA Foundation. Mon., May 23, and Tues., May 6. Sedimentology, Stratigraphy, and Energy Resources 24, from 11:30 a.m.–1 p.m. Location available at GSA’s registra- of Cretaceous Rocks in the Book Cliffs area, Western tion desk. Karlon Blythe, [email protected]. This inter- Colorado and Eastern Utah. Rex Cole, Mesa State active and informative program for undergraduate and gradu- College, (970) 248-1599, [email protected]; Robert ate students, led by professional geoscientists, will cover real Young, consulting geologist. life issues, including professional opportunities and chal- 7. Paleoenvironments and Paleoecology of the Upper lenges that await students after graduation. Plan to attend Jurassic Morrison Formation of the Western U.S. both free luncheons to hear different presenters each day. John Foster, Museum of Western Colorado, (970) Students will receive FREE LUNCH tickets in their registration 242-0971, [email protected]; Steve Hasiotis, packet to attend both Shlemon Programs. However, space is University of Kansas, (785) 864-4941, [email protected]. limited: first come, first served. 8. Current Topics on Regional Vertebrate Tracks in the The John Mann Mentors in Applied Hydrogeology Modern Western Interior of the U.S. Debra Mickelson, Program. Sponsored by GSA Foundation. Mon., May 23, 5– University of Colorado, Boulder, (303) 722-9995, Debra. 6:30 p.m. Location available at GSA’s registration desk. Karlon [email protected]; Martin Lockley, University of Blythe, [email protected]. This event presents mentor- Colorado, Denver, [email protected]. ing opportunities for undergraduate and graduate students 9. Quaternary Tectonics and Hazards and recent graduates with declared interest in hydrogeology in the Rocky Mountain Region. Vince Matthews, as a career to interact and network with practicing hydrogeol- Colorado Geological Survey, (303) 866-3028, vince. ogy professionals. The focused, small-scale program features [email protected]; Verner Johnson, Mesa State College, FREE FOOD for participants. Participant eligibility is limited (970) 248-1672, [email protected]. to those students who have declared their career interest to 10. Terrestrial Planetary Geology in North America. be hydrology or hydrogeology on their GSA membership ap- Joe Fandrich, Mesa State College, (970) 256-9029, plications and who have registered online for this Section [email protected]; Jared Morrow, University of meeting. An e-mail invitation will be sent to those qualified Northern Colorado, (970) 351-2483, jared.morrow@ students. Only a quick response to the invitation will secure unco.edu. you a seat, as attendance is limited.

26 FEBRUARY 2005, GSA TODAY SPECIAL EVENTS for nonprofits. Contact Rex Cole at (970) 248-1599 or • Ice Breaker. Sun., May 22, 5 p.m., W.W. Campbell [email protected]. College Center, Mesa State College. ACCOMMODATIONS • Annual Banquet and Business Meeting. Mon., May 23; An excellent selection of hotels and motels are available location and time TBA. within several miles of the Mesa State campus on Horizon • Rocky Mountain Section Board Meeting. Tues., May Drive. GSA has arranged special rates at the following hotels. 24; location and time TBA. Please contact the hotels directly for reservations. Be sure to SPOUSE AND GUEST ACTIVITIES mention that you would like a Rocky Mountain GSA rate. Grand Junction has numerous facilities and opportunities Because Grand Junction is a popular tourist destination, it is for guests and spouses. The area is rapidly gaining recogni- recommended that you make your reservations early. For all tion for its high quality vineyards, championship golf courses, but the Ramada Inn, the group code is Geological Society of restaurants, museums, and shopping venues. Within minutes America; attendees will need to use this code to receive the of campus are many areas for mountain biking, rafting, hik- discount. ing, rock and fossil collecting, and photography. For addi- Ramada Inn. (970) 243-5150—Discounted rate of $50. tional general information, contact the Grand Junction Best Western Sandman Motel. (970) 243-4140—Discounted Visitor and Convention Bureau (800-962-2547; rate of $55. www.visitgrandjunction.com). Best Western Horizon Inn. (970) 245-1410—Discounted rate of $59 with continental breakfast. STUDENT TRAVEL LaQuinta Inn and Suites. (970) 241-2929—Discounted rate The Rocky Mountain Section and the GSA Foundation have of $65. made travel grants available for students who are presenting Holiday Inn. (970) 243-6790—Discounted rate of $69. oral or poster papers. Students must be currently enrolled and Nearby (5–15 miles) camping facilities are also available in must be Rocky Mountain GSA members. Students should con- Colorado National Monument (www.nps.gov/colm/pphtml/ tact Kenneth Kolm at (303) 231-9115 or [email protected]. camping.html), Colorado River State Park–Fruita, and STUDENT AWARDS Colorado River State Park–Island Acres (www.parks.state.co.us). Awards will be given for best student oral (undergraduate or graduate) and poster (undergraduate only) presentations. ADDITIONAL INFORMATION For additional information, contact general chair Rex Cole To be eligible, students must be lead authors and presenters (970) 248-1599, [email protected]; vice chair Andres Aslan and should clearly identify their abstracts as student work. (970) 248-1614, [email protected]; technical co-chairs EXHIBITS Andres Aslan (970) 248-1614, [email protected], and Rick A limited amount of exhibit space may be available at $250 Livaccari (970) 248-1081, [email protected]; or the field trip per booth for commercial organizations and $100 per booth chair, Gigi Richard, (970) 248-1689, [email protected].

GSA TODAY, FEBRUARY 2005 27 Upcoming Award Deadlines

Funds supporting all but the national awards are administered by the GSA Foundation.

APPLICATIONS DUE Apr. 1, 2005: Don J. Easterbrook Distinguished Scientist Feb. 15, 2005: Antoinette Lierman Medlin Scholarship Award.** Quaternary Geology and Geomorphology in Coal Geology. Coal Geology Division. Please send Division: Nominations due to John E. Costa, U.S. applications to: Dr. Romeo Flores, U.S. Geological Geological Survey, 10615 S.E. Cherry Blossom Dr., Survey, Box 25046, MS 939, Denver Federal Portland, OR 97216, [email protected]. Center, Denver, CO 80225, USA; fax: 303-236-0459; Apr. 1, 2005: Farouk El-Baz Award for Desert [email protected]. For details, see the Research.** Quaternary Geology and Geomorphology December 2004 issue of GSA Today or visit www. Division: Nominations due to Alan R. Gillespie, geosociety.org/grants/medlin.htm. Quaternary Research Center, P.O. Box 351310, University of Washington, Seattle, WA 98195-1360, NOMINATIONS DUE [email protected]. Feb. 20, 2005: Laurence L. Sloss Award for Sedimentary Apr. 30, 2005: National Awards.* (William T. Pecora Geology.** Sedimentary Geology Division: Award, National Medal of Science, Vannevar Bush Nominations due to Paul Link, treasurer, Sedimentary Award, and Alan T. Waterman Award.) Geology, via e-mail (with attachments) to linkpaul@ isu.edu. Feb. 28, 2005: Gilbert H. Cady Award.** Coal Geology *Details and nomination procedures for these awards are Division: Nominations to R. Marc Bustin, The posted at www.geosociety.org/aboutus/awards/. You may also University of British Columbia, Vancouver, BC V6T1Z4, contact Diane Lorenz, (303) 357-1028, [email protected], Grants, Awards, and Recognition, P.O. Box 9140, Canada, [email protected]. Boulder, CO 80301-9140, USA. Mar. 31, 2005: John C. Frye Environmental Geology **For details on these awards, see the January 2005 issue of Award.* GSA Today or visit www.geosociety.org/sectdiv/divisions.htm.

Remember receiving your research GeoCorpsTM America grant from GSA? Remember the feeling of pride and Summer 2005 accomplishment? Application Deadline Don’t you wish others could enjoy this experience? is Fast Approaching! MAKE IT HAPPEN! Have you ever dreamed of getting involved in a project in one of our national parks or national forests? Contribute to GEOSTAR—Supporting Now is your chance! Go to the Web site below to discover exciting summer positions available in the earth sciences. The Advancement of Research. The deadline to apply for a GeoCorps America™ summer 2005 position is February 11, 2005. Hurry and get your application in today! Positions are listed at www.geosociety.org/geocorps/.

Geological Society of America Foundation P.O. Box 9140, Boulder, CO 80301-9140 (303) 357-1054 or [email protected]

28 FEBRUARY 2005, GSA TODAY ™ Want to find out about all our latest GeoVentures™ trips? Join our GeoVentures™ E-News list! See our Web page, GeoVentures 2005 www.geosociety.org/geoventures.

ence educator. Greg studied at Monash University in Melbourne and has worked at James Cook University in Far North Queensland. He has been the manager of education programs at the Australian Geological Survey, as well as at museums and other institutions. Description This special trip for students has been designed to increase your field knowledge of a range of sedimentary and igneous . Come “downunder” and spend time examining huge sedimentary basins, mapping intrusions, identifying fossil assemblages, and visiting caves. For almost half of this trip you will be housed less than 100 yards from a pristine beach and estuary. As well as hav- ing great geological experiences, you will also have time to visit famous landmarks in Sydney and the Australian National Capital, Canberra. While this trip is held in Australia’s winter, tempera- tures are mild and weather is normally dry. All accommodations For Students are in dorms or cabins, and participants will need to supply their Only! own sleeping bags. Once in Australia, you might like to visit some of the other famous places, such as the Great Barrier Reef or Uluru (Ayers Rock) before or after the GeoTrip. Optional extras in- GeoTrip Eastern Australia—Fossils, Intrusions, clude a kayaking experience along a section of rugged coastline Caves, and Coasts or into a pristine lake. Fees and Payment: $1,525 for GSA student members, $1,625 for June 16–June 27, 2005 nonmembers. A $200 deposit is due with your reservation and is Departs from Sydney, Australia refundable (less $75) through May 1. Balance is due May 1. Min.: (10 days, 11 nights) 12 (firm); max.: 20. Included: Ground transportation within Trip Leaders: Gary Lewis, Director, GSA Education and Outreach Australia, all accommodations, all park entry fees, field guides, all Department. Gary, a geologist and educator, has been leading breakfasts, most lunches, four dinners. Not included: Airfare to trips in Australia since 1989. Prior to his work as director of and from Sydney, optional side excursions (caves and kayaks), Education and Outreach at GSA, he worked for the Australian alcoholic beverages, personal expenditures, and any other ex- Geological Survey for 9 years and at CSIRO (Commonwealth penses not specifically included in the itinerary. Scientific & Industrial Research Organisation). Gary studied at To register for this GeoTrip, please fill out and return the regis- Sydney University. Greg McNamara, paleontologist and geosci- tration form below.

DEPOSIT NO. OF TOTAL PAID REGISTER TODAY! PER PERSON PERSONS DEPOSIT AUSTRALIA (STUDENTS) US$200 ____ US$______Send a deposit to hold your reservation; please pay by check or credit card. You will receive further information soon. NEW ZEALAND US$200 ____ US$______GOLDEN US$200 ____ US$______MONTANA US$200 ____ US$______

Name TOTAL DEPOSIT US$______Institution/Employer VISA MasterCard American Express Discover

Mailing Address Credit Card # Exp. Date

City/State/Country/ZIP Signature

Phone (business/home) MAIL OR FAX REGISTRATION FORM AND CHECK OR CREDIT CARD E-mail INFORMATION TO: 2005 GSA GeoVentures, GSA Sales and Service GSA Member # P.O. Box 9140, Boulder, CO 80301 Fax 303-357-1071 MAKE CHECKS PAYABLE TO: GSA 2005 GeoVentures

GSA TODAY, FEBRUARY 2005 29 volcanoes and formed some 600 years ago. GeoTrip The Geology of Middle Earth—A GeoTrip Fees and Payment: $4,375 for GSA members, $4,375 for spouses, $4,775 for nonmembers. A $200 deposit is due with your reserva- through New Zealand tion and is refundable through March 1, less a $75 processing fee. May 1–14, 2005, Auckland, New Zealand Total balance is due March 1, 2005. (Single room supplement is Scientific Leaders: Hamish Campbell, Cliff Atkins, and Craig $800.) Min.: 12; max.: 20. Included: Ground transportation within Jones are professional New Zealand geologists who have exten- New Zealand, lodging, meals, field guides, and entry fees. Not in- sive experience working in New Zealand geology and can also of- cluded: Airfare to Auckland and from Christchurch, optional side fer local knowledge on history, flora and fauna, and more. excursions, alcoholic beverages, personal expenditures, and any Description other expenses not specifically included. New Zealand straddles the boundary between the Pacific and To register for this GeoTrip, please fill out and return the regis- Australian tectonic plates and yields a rich geological history that tration form on page 29. reveals everything from sections of ancient to active volcanoes and glaciated Alps. This dynamic environment created the wild and spectacular landscapes that provide many of the GeoClass Geology of Golden, Colorado, backdrops seen in the “Lord of the Rings” (LOTR) movie trilogy. and the Surrounding Area This ready-made “Middle Earth” owes much of its stunning scen- ery to its geological past. Join this GeoTrip on an excursion along June 17–20, 2005, Table Mountain Inn, Golden, Colorado the length of New Zealand, highlighting geology that made this lo- Scientific Leader: Gregory S. Holden, Colorado School of Mines, cation the ideal setting for LOTR. The trip will appeal to both hard- Golden. A professor at the Colorado School of Mines for 27 years, ened geologists, who revel in diverse rocky environments, and Greg has lead field trips in the Golden area for thousands of stu- nongeologists, who wish to experience breathtaking natural dents, teachers, and professionals, geologists and nongeologists scenery while discovering New Zealand’s rich character and cul- alike. He looks forward to showing off Golden, his favorite geolog- ture. Whether you are a geologist, LOTR fan, tourist, or all three, ical laboratory, and the surrounding area. this trip is bound to please! Description Depending on arrival times, participants can include some sight- Golden, Colorado, a small, historic town at the western foot of the seeing around the Quaternary basaltic volcanic center of southern Rocky Mountains, is separated from the Denver Metro Auckland city. This may include a short ferry ride out to Rangitoto area by lava-capped North and South Table Mountains. Outcrops Island, which is the largest and youngest of the New Zealand and geologic features around Golden illustrate the full geologic history of the southern Rockies and have served as a natural lab- Punakaiki, New Zealand. oratory for generations of geologists at the Colorado School of Mines. This GeoClass will examine the rock record of the Golden area, from the Precambrian to Quaternary pediment gravels. We will see and assess the evidence for original crust formation, the Ancestral Rocky Mountains, the Laramide Orogeny and current Neogene regional uplift. We will see how rock type and processes have shaped the Golden valley and affected land use and infrastructure in the town. The trip for- mat will be van trips to local geologic features and outcrops and short hikes along Front Range trails where, if it is a good season, the spring wildflowers should be at their peak. We will take van trips to Red Rocks Park, North Table Mountain, White Ranch Park, and Golden Gate State Park, all within a 20-minute drive from our hotel in Golden.

Photo courtesy City of Golden.

30 FEBRUARY 2005, GSA TODAY Fees and Payment: $725 for GSA members, $775 for spouses, the geology of the region. The trips will focus on the geology of $825 for nonmembers. A $200 deposit is due with your reserva- two distinct geologic regions: (1) the frontal edge of the tion and is refundable through May 1, less a $20 processing fee. Cordilleran and associated igneous rocks Total balance is due May 1, 2005. Min.: 12; max.: 22. Included: north of Livingston, and (2) Archean to Quaternary geology north Classroom programs and materials, field trip transportation, lodg- of the Yellowstone caldera in the Paradise Valley and surrounding ing for three nights (single occupancy or doubles for couples), mountain ranges. We will also take a trip into Yellowstone breakfast on Saturday, Sunday, and Monday, boxed lunch on National Park to see the travertine deposits of Mammoth Hot Saturday and Sunday, and welcoming and farewell events. Not Springs and tour the geology of the Lamar River Valley. In addi- included: Transportation to and from Golden, Colorado, transpor- tion, we will visit the world-famous dinosaur exhibits located at tation during hours outside field trips, alcoholic beverages, and the Museum of the Rockies in Bozeman, Montana. other expenses not specifically included. Fees and Payment: $1,350 for GSA members, $1,400 for spouses, To register for this GeoClass, please fill out and return the regis- $1,450 for nonmembers. A $200 deposit is due with your reserva- tration form on page 29. tion and is refundable through June 1, less a $20 processing fee. Total balance is due June 1, 2005. Min.: 25; max.: 36. Included: Classroom programs and materials, field trip transportation, lodg- GeoHostel Geologic Excursions in South-Central ing for six nights (single occupancy or double for couples), break- Montana fast and lunch daily, and welcoming and farewell events. Not in- cluded: Transportation to and from Livingston, Montana, July 9–14, 2005 transportation during hours outside field trips, alcoholic bever- Best Western Yellowstone Inn ages, and other expenses not specifically included. Livingston, Montana To register for this trip, please fill out and return the registration Scientific Leaders: Robert C. Thomas and Sheila M. Roberts, form on page 29. University of Montana–Western. Rob Thomas is a professor of geology in the Department of Environmental Sciences at Western, where he teaches his courses in the natural lab that is Photo courtesy Donnie Sexton, Travel Montana. southwest Montana. Western is the experiential learning campus of the University of Montana, and is the first public university in the United States to offer semester courses one at a time. Rob utilizes these field-based courses to incorporate undergraduate students as partners in his research. For example, he and his stu- dents have worked on sedimentary basins along the northern margin of the Yellowstone hot spot for the last ten years. In addi- tion, he and his students have worked on Cambrian mass extinc- tions, the processes that form mixed carbonate-siliciclastic sys- tems, and applied fluvial geomorphology. Rob has partnered for years with Sheila Roberts on the geology of the Lewis and Clark Trail, and together they have pursued innovation in geoscience education. His passion is to make geology accessible to the pub- lic. Sheila Roberts has been a professor of geology and chemistry in the Department of Environmental Sciences at Western for nine years. By utilizing the department’s field-based program, Sheila has incorporated all levels of undergraduate students in her re- search. Her Master’s thesis was on Permian rocks in SW ™ Montana (University of Montana–Missoula). She teaches re- 2005 GeoVentures gional geology at Western and has edited many publications For complete details on GeoVentures™ or for full itineraries, about western Montana, including the 2000 Rocky Mountain contact Edna Collis, program officer, 1-800-472-1988, ext. Regional GSA guidebook. Sheila’s current research is extremely 1034, fax 303-357-1072, [email protected], or contact diverse and includes aspects of Pleistocene climate change in [email protected]. Participants must be 18 or SW Montana, the geology of the Lewis and Clark Trail in Montana, older and in good health. Any physical condition requiring weathering rates of marble tombstones regionally, and the chem- special attention, diet, or treatment must be reported in writ- istry of natural waters in Beaverhead County. ing when reservations are made. We’ll do our best to accom- Description modate special needs, including dietary requirements and The geology of south-central Montana is some of the most varied physical disabilities. Deposits and payments are refundable and interesting in the United States. From Archean basement to less a processing fee, up to the cutoff date. Termination by an Quaternary glacial deposits, this area exposes enough geology to individual during a trip in progress for any reason will not re- meet the needs of even the most discerning geologist. We will sult in a refund, and no refund will be made for unused parts of base our geological explorations in the vibrant, small town of trips. For details on accommodations and occupancies, see Livingston, Montana. This artsy town is located along the banks trip descriptions or contact Edna Collis. of the Yellowstone River and provides an ideal location to explore

GSA TODAY, FEBRUARY 2005 31 GSA Foundation Update—February 2005 Donna L. Russell, Director of Operations

New Officers for TRUSTEE TERM OF SERVICE Peter W. Lipman 2003–2008 the Foundation’s Board Menlo Park, California

At its November meeting, the GSA Foundation Board of George C. Sharp 2001–2006 Trustees appointed Robert D. Hatcher, Jr., as Chair, and David Lakewood, Washington E. Dunn as Vice Chair. Susan M. Landon will continue as Treasurer of the Foundation. Virginia B. Sisson 2000–2005 Houston, Texas

H. Catherine W. Skinner 1997–2007 Current Board of Trustees New Haven, Connecticut TRUSTEE TERM OF SERVICE James E. Slosson 2003–2008 Sherman Oaks, California

Robert D. Hatcher, Jr., Chair 1999–2008 Lee J. Suttner 1997–2007 Oak Ridge, Tennessee Bloomington, Indiana David E. Dunn, Vice Chair 2001–2006 Richardson, Texas

Kenneth W. Ciriacks 2000–2005 Santa Fe, NM

Farouk El–Baz 1999–2008 Boston, Massachusetts Most memorable early geologic experience: Thomas D. Fouch 2004–2009 University of Colorado field camp 1948, when my beau- Lakewood, Colorado tiful plane table topographic/geologic map of Bedrock Peak got only a B! My legend labeled a small patch of Susan M. Landon, Treasurer 1999–2008 soil dirt ! (And that material is still dirt to me!) Denver, Colorado John R. Rand

Enclosed is my contribution in the amount of $______. Please credit my contribution for the: Greatest need Other: ______Fund I have enclosed a $50 (minimum) contribution to GSA Foundation and would GSA FOUNDATION like to receive a copy of GeoTales, volume 1. I have named GSA Foundation in my will. 3300 Penrose Place, P.O. Box 9140 Boulder, CO 80301-9140 PLEASE PRINT (303) 357-1054 [email protected] Name

Donate Online Address

It’s easy! It’s quick! It’s secure! City/State/ZIP Go to www.geosociety.org Click on “Donate Online” and follow the user-friendly instructions today! Phone

32 FEBRUARY 2005, GSA TODAY Announcements MEETINGS CALENDAR 2005 March 1–3 APPEX—AAPG Prospect & Property Expo, London, England; www.aapg.org. March 12 American Society of Civil Engineers, Seattle Section, 22nd Annual Spring Seminar, “Tunneling in the Pacific Northwest,” Seattle, Washington, USA. Information: Mark Rohrbach, [email protected], (253) 383-4940. April 5–7 Return to Rifts?—The Next Wave. Burlington House, London, The Geological Society. Information: Lydia Dumont, The Geological Society, Burlington House, Piccadilly, London W1J OBG, UK, +44 (0)20 7434 9944, fax +44 (0)20 7494 0579, [email protected]. May 24–28 The 51st Annual Meeting of the ILSG, Nipigon, Ontario. Information: www.lakesuperiorgeology. org/nipigon2005; contact e-mail: [email protected]. August 8–11 Earth System Processes 2 (ESP2). Ancient earth systems, modern earth system processes, and earth system futures. Cosponsored by GSA and the Geological Society of Canada. Westin Hotel, Calgary, Alberta, Canada. Information: www.geosociety.org/meetings/esp2/ or contact Deborah Nelson, [email protected], +1.303.357.1014. August 9–12 9th International Conference on Diffuse Pollution, Johannesburg, South Africa. Abstracts due February 28, 2005. Information: www.iwa-wisa-2005.com/ or contact Dr. Ralph Heath at [email protected].

Visit www.geosociety.org/calendar/ for a complete list of upcoming geoscience meetings.

New book titles from the Geological Society of London

Geological Society Special Publication 218 in Earth History Edited by Y. Dilek and P. T. Robinson The 32 research papers in this volume examine the mode and nature of igneous, metamorphic, tectonic, sedimentological and biological processes associated with the evolution of ophiolites in Earth’s history. Divided into six sections, the book presents a wealth of new data and syntheses from ophiolites around the world. Introductory chapters review the distribution of ophiolites in space and time and •ISBN 1-86239-145-9 present a synoptic discussion on their importance in Earth history. Papers in the second section present diverse data from Tethyan •May 2004 •728 pages •Hardback •Prices: List: £95.00/US$171.00 ophiolites and provide refined geodynamic models for their evolution. The following two sections present case studies documenting GSL: £47.50/US$86.00 magmatic, metamorphic and tectonic processes in genesis and hydrothermal and biogenic alteration of fossil . AAPG/SEPM/GSA/RAS/EFG/PESGB: Mechanisms of ophiolite emplacement are explored in Section V with a focus on the Semail (Oman). The last section examines £57.00/US$103.00 the regional occurrence and geodynamic significance of ophiolite belts on different continents. Geological Society Special Publication 219 Intra-Oceanic Subduction Systems: Tectonic and Magmatic Processes Edited by R. D. Larter and P. T. Leat Recycling of oceanic plate back into the Earth’s interior at subduction zones is one of the key processes in Earth evolution. Volcanic arcs, which form above subduction zones, are the most visible manifestations of plate tectonics, the convection mechanism by which •ISBN 1-86239-147-5 the Earth loses excess heat. They are probably also the main location where new continental crust is formed, the so-called •November 2003 •358 pages •Hardback ‘subduction factory’. About 40% of modern subduction zones on Earth are intra-oceanic. These subduction systems are generally •Prices: List: £85.00/US$153.00 simpler than those at continental margins as they commonly have a shorter history of subduction and their magmas are not GSL: £42.50/US$77.00 contaminated by ancient sialic crust. They are therefore the optimum locations for studies of mantle processes and magmatic AAPG/SEPM/GSA/RAS/EFG/PESGB: addition to the crust in subduction zones. £51.00/US$92.00 Please order from the AAPG: Inside North, Central or South America please order from: http://bookstore.aapg.org or AAPG Bookstore, PO Box 979, Tulsa, OK 74101-0979, USA Save time: 8am to 4pm (CST) USA & Canada: 1-800-364-AAPG (2274) International: +1-918-584-2555 (Please have your member number ready, along with your credit card and catalog order numbers) Fax (USA & Canada): 1-800-898-2274 Fax (International): +1-918-560-2652 Email: [email protected] AAPG Online Bookstore: http://bookstore.aapg.org For Full details see the Geological Society Online Bookshop: www.geolsoc.org.uk/bookshop

GSA TODAY, FEBRUARY 2005 33 The American Geological Institute’s Environmental Awareness Series Aggregate and the Environment William H. Langer, Lawrence J. Drew, Janet S. Sachs ISBN 0-922152-71-3. Item #631601 Aggregate resources are vital to our way of life because they are the major raw materials used in construction of roads, rail lines, bridges, hospitals, schools, airports, factories, and homes, but the mining and processing of natural resources such as aggregate commonly raises concerns about potential environmental impacts. This book is designed to help you understand our aggregate resources and our living planet. Petroleum and the Environment William E. Harrison and Stephen M. Testa ISBN 0-922152-68-3. Item #605002

Concerned citizens recognize the need to manage both our petroleum resources and natural environments wisely. This publication provides an introduction to the major environmental concerns and solutions associated with petroleum exploration, production, transportation, and use.

Meeting Challenges with Geologic Maps William A. Thomas ISBN 0-922152-70-5. item #634601 Geologic maps are our most important and complete compilation of information about the solid Earth we live on, and we cannot understand the Earth without them. Meeting Challenges with Geologic Maps presents 16 examples that show how geologic maps are helping to delineate fragile habitat and ecosystems, protect against natural hazards, and find needed resources.

All in full-color paperback, 8.50”x11.00” 64 Water – not oil or minerals – is the pp. New Pricing! $9.95 each + $7.00 S&H for most controlling resource on Earth. U.S. delivery. (or $7.96 + $7.00 for members Its distribution, quantity, availability, of AGI Member Societies.) Please contact and quality are the controls for the AGI for multiple copy purchases or shipping development of agriculture, industry, outside U.S. All books (except Geologic Maps) rural, urban, and municipal use. include a full-color poster with investigative Water and the Environment provides activity for students on back. Please order information about water and its online at www.agiweb.org/pubs or phone: importance; where water comes (703) 379-2480; fax: (703) 379-7563; email: from; water-related environmental [email protected]. The series also includes concerns; water protection, policies Living with Karst — A Fragile Foundation; and regulations; and our future Metal, Mining and the Environment; Sustaining needs for water. Our Soils and Society; and Groundwater: A Water and the Environment Primer, all available from AGI. Stephen J. Vandas, Thomas C. Winter, and William A. Battaglin photos by Corbis Images ISBN 0-922152-63-2. Item #633001 Classified Rates Ads (or cancellations) must reach the GSA Advertising office one month prior to issue. Contact Advertising Department: [email protected]; +1.800.472.1988 x1053; +1.303.357.1053. Complete contact information, including mailing and email address, must be included with all correspondence.

Per line each Per Line for addt’l month Classification 1st month (same ad) CLASSIFIED ADVERTISING Situations Wanted $2.75 $2.40 Positions Open $7.50 $6.50 Opportunities for Students First 25 lines $0.00 $3.35 additional lines $2.35 $3.35 Web Only Ads $7.50 $6.50 Live link: add $25

To estimate cost, count 54 characters per line, includ- ing all punctuation and blank spaces. Actual cost may differ if you use capitals, centered copy, or special characters.

Positions Open

FACULTY POSITION IN GEOPHYSICS UNIVERSITY OF WISCONSIN–MADISON The Department of Geology and Geophysics invites applications for a tenure-track assistant professor position in geophysics beginning August 2005. The evaluation of candidates will focus primarily on their potential for innovative scientific research and teach- ing. We invite applications from outstanding candi- dates across the spectrum of geophysical research, and particularly encourage candidates who would interact with our existing programs in , seismol- ogy, structural geology, and tectonophysics. Teaching responsibilities are at both the graduate and under- graduate level. Applicants should submit a resume, statement of research interests, and names of three or more references by March 1, 2005, to: Geophysics Search Committee Chair, Department of Geology and Geophysics, University of Wisconsin–Madison, 1215 W. Dayton St., Madison, WI 53706 The University of Wisconsin–Madison is an equal- professor rank on the tenure-track. Exceptional can- geoscience education, and demonstrate a commitment opportunity/affirmative action employer and encourages didates may be considered at the associate professor to excellence in geoscience teaching. The candidate will applications from women and minorities. rank. A Ph.D. in Planetary or Earth Science or appropri- be expected to teach multiple sections of the introduc- STRUCTURAL GEOLOGY/BATES COLLEGE ate field with a remote sensing specialty is required. tory course each semester and oversee the integration The Bates College Department of Geology invites A strong interest in developing collaborative research of its laboratory into the curriculum. See http://www. applications for a one-year sabbatical leave replace- projects with existing interests in volcanology, plan- wsu.geology/ for more details on the position, the intro- ment in the general area of tectonics and structural etary surface processes, characterization of planetary ductory course and its role in our department’s cur- geology beginning in Fall 2005. surfaces, and planetary analog studies is expected. riculum. Bates College is a highly selective liberal arts college Significant and ongoing involvement with space mis- Applications should include a full curriculum vitae, of approximately 2,000 students, located in Maine, 1 sions and the space community will be an advantage. a statement of teaching philosophy, and the names, hour north of Portland and 2.5 hours north of Boston. Duties will include teaching graduate courses in the addresses and email addresses of 3 referees. Screening Bedrock outcrops along the Maine coast and the areas of Planetary Science, and Applications of Remote of applicants will begin February 15, 2005. Applications White Mountains, which the department uses for labs, Sensing, on campus and through distance learning for the position should be addressed to Dr. Michael fieldtrips, and research, expose world-class structures technologies; research; advising students; and provid- Pope, Chair, Geoscience Instructor Search Committee, produced by Acadian and Alleghenian collisions and ing service to the University and the community. Department of Geology, Washington State University, Mesozoic rifting. Space Studies is an interdisciplinary program featur- Pullman, WA 99164, USA. Teaching responsibilities include an introductory tec- ing an M.S. degree and an undergraduate minor. This Washington State University employs only U.S. citi- tonics course with multiple lab sections, a sophomore- new faculty position will enhance and complement the zens and lawfully authorized non-U.S. citizens. All new level structural geology course with a lab, and an advanced department’s current emphasis in space policy, space employees must show employment eligibility verification junior/senior-level geology course on a topic of the can- history, space systems engineering, space life sciences, as required by the U.S. Immigration and Naturalization didates choosing. The replacement is also expected to planetary science, remote sensing, and Earth system Service. WASHINGTON STATE UNIVERSITY IS AN advise one to three senior theses during the year as part of science. An interdisciplinary appreciation of space EQUAL OPPORTUNITY/AFFIRMATIVE ACTION the department’s required senior thesis program. A Ph.D. exploration will be expected. A Ph.D. is planned for EDUCATOR AND EMPLOYER. Members of ethnic minor- is preferred, but consideration will be given to applicants the near future and the new hire is expected to play an ities, women, Vietnam era or disabled veterans, persons who have not yet completed their Ph.D. important role in developing a research focus in the area of disability and/or persons the ages of 40 and over are Review of applications begins April 1, 2005, and of planetary science. The department is the lead institu- encouraged to apply. tion in North Dakota’s NASA Space Grant Consortium will continue until the position is filled. Please mail a SURFICIAL PROCESSES/HYDROLOGY and the ND NASA EPSCoR Program. Additional informa- letter of application, curriculum vitae, transcripts, three COLLEGE OF WILLIAM & MARY tion about the department is at http://www.space.edu. complete letters of recommendation and sample syl- The Geology Department at the College of William & Salary will be competitive and commensurate with labi for one or more of the courses above to: Geology Mary is seeking applicants for a full-time, one-year, qualifications and experience. Send a letter of applica- Search Committee (#R2354), c/o Bates College leave-replacement position for the academic year 2005– tion, CV, teaching and research statements, names and Academic Services, 2 Andrews Road, 7 Lane Hall, 2006 pending budgetary approval. The successful appli- contact information for three references to: Dr. Shan de Lewiston, ME 04240. cant will teach undergraduate courses including surface Silva, Chair, Dept. of Space Studies, University of North For more information, please contact Prof. Dykstra processes, hydrology, environmental geology, and intro- Dakota, PO Box 9008, Grand Forks, ND 58202-9008. Eusden, Chair, at [email protected], www.bates.edu. ductory geology. We seek a colleague eager to interact Email: [email protected]. UND is an equal opportunity, Bates College values a diverse college community with undergraduates in an environment where teaching affirmative action employer. and seeks to assure equal opportunity through a con- and research are emphasized. The department has five tinuing and effective Affirmative Action program. PERMANENT FULL-TIME INSTRUCTOR POSITION full-time faculty and a laboratory coordinator. We prefer PLANETARY SCIENCE/REMOTE SENSING WASHINGTON STATE UNIVERSITY candidates who will have Ph.D. in hand at the time of UNIVERSITY OF NORTH DAKOTA The Department of Geology, Washington State appointment, but will consider those nearing completion The Department of Space Studies at the University of University, seeks to fill a full-time, permanent instructor of the Ph.D. Applicants should send a letter of applica- North Dakota seeks a Planetary Scientist with strong position for our popular introductory Physical Geology tion, current c.v., statement of teaching interests, and remote sensing training to begin their appointment Fall course to begin Fall semester 2005. The successful can- three letters of reference to: Greg Hancock, Department Semester 2005. Appointment will be at the assistant didate must have earned a Ph.D. in the geosciences or of Geology, College of William & Mary, PO Box 8795,

GSA TODAY, FEBRUARY 2005 35 Williamsburg, VA 23187-8795. E-mail: [email protected]. THREE TENURE TRACK POSITIONS Beuthin, Geology Search Committee Chair, Department Review begins February 21, 2005, and will continue until UNC–CHAPEL HILL IN GEOLOGICAL of Geology & Planetary Science, University of Pittsburgh the position is filled. The College of William & Mary is an OCEANOGRAPHY AND/OR SEDIMENT DYNAMICS at Johnstown, Johnstown, PA, 15904. Review of appli- EEO/AA university. The Marine Sciences Program of the University of North cations will begin on February 1, 2005, and will continue Carolina at Chapel Hill seeks to fill three (3) tenure until the position is filled. Email correspondence can be LECTURER, DEPARTMENT OF GEOLOGY track faculty positions spanning the areas of Geological sent to [email protected]. The University of Pittsburgh UNIVERSITY OF TORONTO Oceanography, Marine Geology and Sediment is an Equal Opportunity, Affirmative Action employer. We invite applications for a full-time teaching-stream Dynamics. Two positions will be at the Institute of Marine Women and members of minority groups underrepre- appointment at the rank of Lecturer. The primary respon- Sciences (IMS) on the coast in Morehead City, and one sented in academia are especially encouraged to apply. sibilities will be to teach and provide innovative sup- will be in the Department of Marine Sciences (MASC) in port for undergraduate courses in geology. In addition, STABLE ISOTOPE GEOCHEMISTRY Chapel Hill. the Lecturer will assist with field courses and provide SOUTHERN ILLINOIS UNIVERSITY CARBONDALE Department of Marine Sciences Position: All support for laboratory classes. Important secondary The Department of Geology at Southern Illinois aspects of geological oceanography will be considered. responsibilities are to take a leadership role in geosci- University Carbondale invites applications for a tenure- We encourage applicants whose research complements ence awareness activities, and to engage in university track position in stable isotope geochemistry at the existing strengths and/or cuts across traditional disci- outreach programs, including participation in depart- assistant professor level with a start date of Aug. 16, plinary boundaries (see www.marine.unc.edu/MASC. mental promotional events and presentations at schools 2005. Post-doctoral experience is preferred. The appli- html for further information). The candidate filling the and other public organizations. There is no requirement cant should demonstrate the existence of, or potential MASC position will be expected to teach one course per as Lecturer to do research but the individual selected for developing, an internationally recognized, externally semester. is not discouraged from this. A Ph.D. in Geology or a funded research program. We prefer a stable isotope Institute of Marine Sciences Positions: Estuarine, related area is required, together with evidence of excel- geochemist who can contribute to our existing strengths coastal and continental shelf processes are focal areas lence in teaching at the university level. in energy and environmental geology with the potential at IMS, and interest in observational studies is desir- The appointment is available from July 1, 2005. to collaborate with faculty in other departments, such as able (see www.marine.unc.edu/IMS.html for more infor- It is initially for a term of one year and, following a an ecologist currently being sought by the Department mation). The IMS positions carry no formal teaching successful review, will be renewed. Lecturer positions of Zoology, or with the Coal Research Center or the requirement, although undergraduate and graduate at the University of Toronto are renewable annually Mining and Mineral Resources Program. The successful teaching opportunities exist. and assessment for promotion to a continuing Senior applicant is expected to teach courses in introductory The selected individuals will be expected to develop Lecturer rank may take place in the fifth year. geology and undergraduate and graduate courses in vigorous, externally funded research programs, pub- Applicants should send their curriculum vitae with their area of expertise. Normal teaching load is three to lish in peer-reviewed journals, and direct graduate a statement of their teaching philosophy and materials four courses per academic year. Applicants must hold a students. Qualifications include a Ph.D. in Geological relevant to teaching experience. They should also ask Ph.D. or show that they will complete all degree require- Oceanography, Marine Geology, Engineering or a related three referees to send letters directly to the search com- ments by the time of appointment. field. Post-doctoral experience is preferred. We antici- mittee. Applications and letters of reference should be Review of applications will begin February 15, 2005, pate that these positions will be filled at the Assistant sent to: Chair, Lecturer Search, Department of Geology, and continue until the position is filled. Applicants Professor level; one position at IMS might be filled at the University of Toronto, 22 Russell Street, Toronto, should submit a curriculum vitae, a statement of Associate Professor level. Nine months’ salary support Ontario, Canada M5S 3B1. teaching and research interests, and the names and is provided for each position. E-mailed applications and letters of reference will not addresses of at least three referees to: Dr. Scott Ishman, Applicants should submit a CV and statements be accepted nor will letters of reference submitted with Search Committee Chair, Department of Geology, of research and (for MASC) teaching interests. Also the application package. The application deadline is Mailcode 4324, Southern Illinois University Carbondale, arrange for four letters of reference to be sent to the February 14, 2005. Applications received after this date Carbondale, IL 62901-4324. Fax: (618) 453-7393. E-mail: Chair, Geological Oceanography Search Committee, will be considered until the position has been filled. [email protected]. UNC–Chapel Hill, Dept. of Marine Sciences, Venable The University of Toronto is strongly committed to Southern Illinois University Carbondale is a large, Hall CB#3300, Chapel Hill, NC 27599. Please indi- diversity within its community and especially welcomes research-oriented institution situated in a pleasant cate whether you would like to locate at IMS or MASC. applications from visible minority group members, small-town setting southeast of St. Louis. SIUC is seek- Applications will be considered beginning March 1, women, Aboriginal persons, persons with disabilities, ing to enhance interdisciplinary research as it strives to 2005. The University of North Carolina at Chapel Hill is members of sexual minority groups and others who may be a top 75 public research university (http://news.siu. an equal opportunity employer. contribute to the further diversification of ideas. edu/s150/). The Geology Department has a full-time fac- All qualified candidates are encouraged to apply; ASSISTANT PROFESSOR, GEOPHYSICS ulty of 10 with about 40 undergraduate and 30 graduate however, Canadians and permanent residents will be UTAH STATE UNIVERSITY students and offers Bachelor and Master degree pro- given priority. The Geology Department at Utah State University seeks grams in geology and participates in the Interdisciplinary candidates for a tenure-track position at the assis- Environmental Resources and Policy Ph.D. program. TENURE-TRACK ASSISTANT PROFESSORSHIP tant professor rank in geophysics to start in August For further information, please visit our comprehen- PALEOCEANOGRAPHY, UNIVERSITY OF TORONTO 2005. A Ph.D. in geophysics or a closely related field is sive website www.science.siu.edu/geology. SIUC is The University of Toronto is further expanding its required for the position, and candidates should have an affirmative action/equal opportunity employer that research in the area of climate change and, to that end, demonstrated research excellence and a commitment strives to enhance its ability to develop a diverse faculty the Department of Geology is seeking an outstand- to teaching. Successful candidates will be expected to and staff and to increase its potential to serve a diverse ing individual for an appointment on its St. George develop an independent research program, to teach student population. All applications are welcomed and (downtown) campus at the level of assistant professor graduate and undergraduate courses in geophysics, encouraged and will receive consideration. in paleoceanography. We encourage applications from and to integrate with existing strengths in the depart- candidates in all specialties within this broad field. ment. We encourage geophysicists with expertise in Applicants must demonstrate their academic excel- (but not limited to) seismology, exploration geophysics, lence, their ability of independent research and a poten- geodesy, potential fields, geodynamics, and paleomag- tial for collaboration with existing research programs netism and who examine processes within the conti- in the University. In addition to establishing an interna- Opportunities for Students nental crust/lithosphere to apply. Further information is tionally recognized independent research program, the available at http://www.usu.edu/geoldept/. Applicants Three Applied Geohydrology Summer Research successful candidate must have a strong commitment should send a detailed CV, statements of teaching and Assistantships. Kansas Geological Survey, University to teaching. He/she will be expected to teach graduate research interests, and names and addresses of at of Kansas. These are 12-week summer positions open and upper level undergraduate courses in fields related least three references to: Prof. James P. Evans, Chair, to students at any university. $5,880 for 12 weeks. to their specialization as well as general introductory Search Comm., Dept. of Geology, Utah State University, Required: Relevant coursework in earth sciences or courses. The position is available from July 1, 2005. Logan, UT 84322-4505. Review of applications will engineering and interest in hydrogeology. Initial review Applicants should provide their curriculum vitae, begin Feb. 1, 2005. USU is an AA/EO employer with an date: March 1, 2005. For more information go to http:// including a list of publications, a brief statement describ- NSF Advance Grant to promote opportunities for minori- www.kgs.ku.edu/General/jobs/geohydro_applied.html; ing their research program and teaching philosophy. ties and women in the sciences and engineering. to apply go to http://jobs.ku.edu (search by Research They should also ask three referees to send letters Assistant title). EO/AA Employer. directly to the search committee. Applications and letters MINERALOGY/PETROLOGY/STRUCTURAL of reference should be sent to: Chair, Paleoceanography GEOLOGY Opportunities for Graduate Study in Geology at Search, Department of Geology, University of Toronto, UNIVERSITY OF PITTSBURGH AT JOHNSTOWN Kent State University. The Department of Geology at 22 Russell Street, Toronto, Ontario, Canada M5S 3B1. The University of Pittsburgh at Johnstown, a four-year, Kent State University, composed of sixteen full-time E-mailed applications and letters of reference will not degree-granting institution invites applications for a faculty, seeks motivated students for graduate study in be accepted nor will letters of reference submitted with tenure-track position at the Assistant Professor level Geology in the general areas of: Earth Evolution, Earth the application package. The application deadline is in the Department of Geology & Planetary Science Surface Processes, Engineering Geology, or Tectonics. February 14, 2005. Applications received after this date beginning in the 2005 fall term. Primary instructional Interdisciplinary research opportunities are also avail- will be considered if the position has not been filled. responsibilities will include Mineralogy, Igneous and able through the Kent State University Water Resources CLASSIFIED ADVERTISING The University of Toronto is strongly committed to Metamorphic Petrology, and Structural Geology courses Research Institute (http://dept.kent.edu/wrri/). Graduate diversity within its community. The University espe- (including labs), as well as non-lab introductory courses. stipends are awarded on a competitive basis with roll- cially welcomes applications from visible minority group Requirements include: Ph.D. in geology at time of ing admission. While applications are evaluated con- members, women, Aboriginal persons, persons with dis- appointment; teaching and research experience appro- tinuously, to receive full consideration for financial sup- abilities, members of sexual minority groups, and others priate to the position; strong commitment to undergrad- port, they must be received by February 15 for August who may add to the diversity of ideas. Information about uate education including field-oriented undergraduate admission. Applications may be submitted to Kent State the department is on our web site at www.geology.uto- research; and excellent communication skills. An inter- University online at: http://dept.kent.edu/geology/gradu- ronto.ca. Enquiries about the application should be sent est in Appalachian geology is also desirable. To apply, ate/gradapp.html. to [email protected]. send a letter of interest (including a statement of teach- For complete information regarding faculty research All qualified candidates are encouraged to apply; ing and research goals); a statement of eligibility to work interests and the graduate program, please see our however, Canadians and permanent residents will be in the U.S.; curriculum vita; transcripts for all degrees website (http://dept.kent.edu/geology/) or contact given priority. (copies acceptable initially); and names and contact the graduate coordinator, Dr. Rodney Feldmann. The information for at least three references to Dr. Jack D.

36 FEBRUARY 2005, GSA TODAY Department of Geology offers a comprehensive course YOUNGSTOWN STATE of study leading to the M.S. or Ph.D. degree. Emphasis is placed on research designed not only to advance the UNIVERSITY understanding of the geological sciences, but also to solve societal problems. SEDIMENTARY Students wanted for asteroid spectroscopic GEOLOGY research. The Department of Space Studies at the University of North Dakota in Grand Forks is seeking prospective Master’s and Doctoral students who wish to THE DEPARTMENT OF GEOLOGICAL pursue careers in asteroid research. Specifically, we are & ENVIRONMENTAL SCIENCES at looking for students with geological backgrounds (BS or IS ALSO ONLINE YOUNGSTOWN STATE UNIVERSITY CLASSIFIED ADVERTISING MS degree) who are interested in asteroid mineralogical invites applications for a tenure-track faculty studies via the application of near-infrared spectroscopic techniques using large astronomical observatories. This position available Fall 2005. Ph.D. in a research aims to identify asteroid major mineralogies, geoscience area required. Seeking individual redox states, and the relationships between asteroids To view GSA Today online, committed to excellence in teaching and and meteorites. Both main-belt and near-Earth asteroids research in Sedimentology/Stratigraphy. are presently areas of focus. Knowledge obtained is used go to www.gsajournals.org Preference will be given to candidates with to constrain early solar system physical conditions and to determine hazard mitigation techniques for potentially interests in science education, paleontology, hazardous asteroids. Contact Dr. Paul Hardersen at (701) and click on geomorphology and/or GIS applications. 777-4896 or via email at Hardersen@.space.edu for more information. Review of application will begin “Online Journals” February 15, 2005. then on the cover of Submit letter of application, current vita, official transcripts of all degrees, and three references GSA Today. to: Dr. Charles Singler, Chairperson, Geological & Environmental Sciences, You can also view Youngstown State University, One University Plaza, Youngstown OH 44555. back issues through the Website: www.ysu.edu For additional information regarding “Archives” button. YSU hiring procedures visit us at www.cc.ysu.edu/hr Access to GSA Today YSU is an affirmative action/equal opportunity online is free. employer committed to increasing the diversity of its faculty, staff and students.

GSA TODAY, FEBRUARY 2005 37 GEOSCIENCE DIRECTORY

Books—Used & Rare Geo/Paleo Pick from Estwing. Perfect tool for all Software geological and paleo digs. Ideal for all professionals Recent, Rare, and Out-of-print Books. Find Geosoft, a leading provider of exploration and and serious rockhounds. 815-397-9558; www.estwing. our catalogs at http://booksgeology.com for earth science mapping software, Releases Oasis com; [email protected]. books on geoscience, paleontology, mineralogy, montaj Version 6.0. Major software release features mining history, ore deposits, USGS publications, Rigaku/MSC, Inc. A pioneer in the X-ray industry! enhanced usability, interface and map editing petroleum, remote sensing and metallurgy. E-mail: Specializing in materials analysis with state-of-the- functionality for power users. www.geosoft.com. [email protected]. We purchase books art, fully automated X-ray fl uorescence spectrometer Contact [email protected] for details of our and entire collections. MS Book and Mineral Company, systems. XRF Sales: 281-363-1033, ext. 113; current montaj Software Promotion! www.rigakumsc.com. P.O. Box 6774, Lake Charles, LA 70606-6774 USA Over 200 earth science and GIS software solutions SOILMOISTURE EQUIPMENT CORP. Clients at rockware.com. RocksWorksTM, The Geochemist's Consultants worldwide, rely on Soilmoisture equipment for Workbench®, LogPlotTM, RockWare Visual Seismic, Soil Tectonics. Soil dating and paleoseismology to characterization of moisture-holding capacities AqQATM, RockWare Stereonet, LithoTectTM, and GIS enhance your project. 510-654-1619, gborchardt@usa. of soils/plants. Also carry Eijkelkamp equipment. software. RockWare, Inc., +1.303.278.3534. www. net, www.soiltectonics.com. [email protected] or 1-888-964-0040 Ext. rockware.com. 248; http://www.soilmoisture.com. Contract Labs Technical Services Imaging WRL Labs—A comprehensive analytical contract Earth Research—offers a full range of academic facility. Trace elements by DRC-ICP-MS, Laser ablation Southwest Satellite Imaging. Affordable custom image research services specializing in earth sciences, ICP-MS. Also available: GC-MS, TOC, HPLC, and IC. processing, optimized for geologic mapping and analyses. geology, geography, and environment. Web-based at Open to outside users. Contact Dr. Robyn Hannigan, 866-230-8941, [email protected]. www.earthresearch.com. 870-680-4360, [email protected], www.cas. astate.edu/geochemistry. Instrumentation Travel, Tours, Field Camps EDAX Inc.—For electron microscopy, EDAX offers MOUNTAIN STUDIES INSTITUTE hosts FIELD Editing Services the GENESIS EDS system and the TSL OIM electron CAMPS in San Juan Mtns, CO. Diverse geology & Mary C. Eberle, B.A., M.S., contract editor for the backscatter diffraction system. The stand alone ecosystems, research sites, mining history/active Geological Society of America and other geological Eagle Micro-XRF system includes spectral analysis remediation. Lodging in Historic Avon Hotel. Bring outfi ts, invites you to inquire about her editing services. and mapping capabilities. Visit our web site for more students! Koren Nydick, [email protected], She can distinguish “early” from “lower” and “” information on our product lines.www.EDAX.com (970) 387-5161, http://www.mountainstudies.org. from “basite.” Clarity and consistency are her goals. Calibrated Emission Measurements On The Go! List your fi eld camps here! Send to, GSA Advertising, www.wordrite.com. Model 102F: Hand Portable; Rugged FT-IR, Proven [email protected]. Performance; Thermally stabilized, lightweight case Equipment and Supplies with on-board PC. Designs & Prototypes, Ltd. Rates Microscopes. Modular Stereo. Precision, durability, +1.860.658.0458. www.designandprototypes.com. $55 per month; each additional line: add $15 quality, and value in Meiji’s EM Series of Stereo (max 5 lines) Microscopes. They’re Crystal Clear! Meiji Techno Maps $125 for three months; $250 for six months; America. 800-832-0060; www.meijitechno.com. Aerial Photos & Topo Maps. All 50 states at www. $475 for twelve months; Gas Sampling Bags are a convenient, reliable, digital-topo-maps.com. Waterproof paper and NEW! Include your corporate logo online! economical way of collecting airborne hazards. Available fi eldbooks at www.waterproof-paper.com. → Contact for specs & pricing. in Tedlar, FEP and other fi lms with many fi tting options. 14 Liter Tefl on Churn Splitter and other unique Tefl on New Product Press Releases Monthly GeoMart listing includes FREE Web posting products made exclusively for FISP & USGS. Many Send your new product press release to GeoMart and link. Check it out online at: other Fluoropolymer (Tefl on) products. Jensen Inert Geoscience Directory, GSA Advertising, acrawford@ www.geosociety.org/classiads/geoMart.htm. Products. 1-800-446-3781, www.jenseninert.com. geosociety.org. CONTACT Permanent Specimen Protection. Lane Science GSA Advertising Coordinator, Ann Crawford Equipment cabinets. First choice throughout the world Science Teaching Aids [email protected] for specimen preservation. New York, 212-563-0663; Life-size Dinosaur Skeleton Kits with curriculum and +1.800.472.1988 x1053 www.lanescience.com. facts. Reconstruct entire dinosaur or marine reptile Forestry Suppliers, Inc. Where the well-dressed skeleton and experience the process Paleontologists geologist shops! More than 9,000 top-quality products perform. Skeletons range from 6' to 10'6" long. Sales: 800-647-5368, www.forestry-suppliers.com. Contact 603-863-0066; www.dinosaurdiscovery.com, [email protected]. Gatan Inc. is excited to announce the launch of new products for TEM and SEM applications: STEMPack “K-Gray” Earth Science Education Program. (Analytical); EDS Acquisition/Analysis (Analytical/ Hundreds of concepts learned quickly while solving Software); ES500W Erlangshen CCD Camera ROCK DETECTIVE MYSTERIES leading to, (Imaging); Slope Cutter (Specimen Prep); Turbo “Oh, Wows!” about our dynamic planet. 25 mysteries, Pumping Station (Specimen Prep); ChromaCL instruction, and samples in 5-gallon bucket, or 75 (SEM Imaging); and Tomography Holders in Rolling Cart. More than 80,000 “K-Gray” samples (Specimen Holders). www.gatan.com. distributed worldwide in past decade. www.rockdetective.org.

38 FEBRUARY 2005, GSA TODAY COMPREHENSIVE AND STATE-OF-THE-ART! Geologic Map of

North America Available FEBRUARY Compiled by John C. Reed Jr., John O. Wheeler, 2005 and Brian E. Tucholke

The new Geologic Map of North America covers ~15% of Earth’s surface and differs from previous maps in several important respects: It is the fi rst such map to depict the geology of the seafl oor, the fi rst compiled since the general acceptance of plate-tectonic theory, and the fi rst since radiometric dates for plutonic and volcanic rocks became widely available. It also refl ects enormous advances in conventional geologic mapping, advances that have led to a signifi cant increase in the complexity of the map. The new map, printed in 11 colors, distinguishes more than 900 rock units, 110 of which are offshore. It depicts more than seven times the number of on-land units as are shown on its immediate predecessor, as well as many more faults and additional features such as volcanoes, calderas, impact structures, small bodies of unusual igneous rocks, and diapirs. When displayed at earth science institutions and libraries, this map is sure to impress viewers with the grand design of the continent and may inspire some to pursue the science of geology. The new Geologic Map of North America is also a “thinking map,” a source for new interpretations of the geology of North America, insights into the evolution of the continent, new

exploration strategies for the discovery of mineral and energy

resources, and the development of better ways to assess and mitigate environmental risks and geologic hazards. CSM001F, 3 folded sheets, 3 sheets (74" × 39"), scale 1:5,000,000, 28 p. text $150.00, member price $120.00 CSM001R, 3 rolled sheets, $155.00, member price $125.00

GSA Sales and Service P.O. Box 9140, Boulder, CO 80301-9140, USA 303-357-1000, option 3 • Toll-free: 1-888-443-4472 • Fax: 303-357-1071 www.geosociety.org