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Poster Final
Evidence for polyphase deformation in the mylonitic zones bounding the Chester and Athens Domes, in southeastern Vermont, from 40Ar/39Ar geochronology Schnalzer, K., Webb, L., McCarthy, K., University of Vermont Department of Geology, Burlington Vermont, USA CLM 40 39 Sample Mineral Assemblage Metamorphic Facies Abstract Microstructure and Ar/ Ar Geochronology 18CD08A Quartz, Muscovite, Biotite, Feldspar, Epidote Upper Greenschist to Lower Amphibolite The Chester and Athens Domes are a composite mantled gneiss QC Twelve samples were collected during the fall of 2018 from the shear zones bounding the Chester and Athens Domes for 18CD08B Quartz, Biotite, Feldspar, Amphibole Amphibolite Facies 18CD08C Quartz, Muscovite, Biotite, Feldspar, Epidote Upper Greenschist to Lower Amphibolite dome in southeast Vermont. While debate persists regarding Me 40 39 microstructural analysis and Ar/ Ar age dating. These samples were divided between two transects, one in the northeastern 18CD08D Quartz, Muscovite, Biotite, Feldspar, Garnet Upper Greenschist to Lower Amphibolite the mechanisms of dome formation, most workers consider the VT NH section of the Chester dome and the second in the southern section of the Athens dome. These samples were analyzed by X-ray 18CD08E Quartz, Muscovite Greenschist Facies domes to have formed during the Acadian Orogeny. This study diraction in the fall of 2018. Oriented, orthogonal thin sections were also prepared for each of the twelve samples. The thin sec- 18CD09A Quartz, Amphibole Amphib olite Facies 40 CVGT integrates the results of Ar/Ar step-heating of single mineral NY tions named with an “X” were cut parallel to the stretching lineation (X) and normal to the foliation (Z) whereas the thin sections 18CD09B Quartz, Biotite, Feldspar, Amphibole, Muscovite Amphibolite Facies grains, or small multigrain aliquots, with data from microstruc- 18CD09C Quartz, Amphibole, Feldspar Amphibolite Facies named with a “Y” have been cut perpendicular to the ‘X-Z’ thin section. -
Strike and Dip Refer to the Orientation Or Attitude of a Geologic Feature. The
Name__________________________________ 89.325 – Geology for Engineers Faults, Folds, Outcrop Patterns and Geologic Maps I. Properties of Earth Materials When rocks are subjected to differential stress the resulting build-up in strain can cause deformation. Depending on the material properties the result can either be elastic deformation which can ultimately lead to the breaking of the rock material (faults) or ductile deformation which can lead to the development of folds. In this exercise we will look at the various types of deformation and how geologists use geologic maps to understand this deformation. II. Strike and Dip Strike and dip refer to the orientation or attitude of a geologic feature. The strike line of a bed, fault, or other planar feature, is a line representing the intersection of that feature with a horizontal plane. On a geologic map, this is represented with a short straight line segment oriented parallel to the strike line. Strike (or strike angle) can be given as either a quadrant compass bearing of the strike line (N25°E for example) or in terms of east or west of true north or south, a single three digit number representing the azimuth, where the lower number is usually given (where the example of N25°E would simply be 025), or the azimuth number followed by the degree sign (example of N25°E would be 025°). The dip gives the steepest angle of descent of a tilted bed or feature relative to a horizontal plane, and is given by the number (0°-90°) as well as a letter (N, S, E, W) with rough direction in which the bed is dipping. -
Sedimentary Record of Cretaceous And
SEDIMENT AR Y RECORD OF CRETACEOUS AND TER TIAR Y SALT MOVEMENT, EAST TEXAS BASIN: TIMES, RATES, AND LUMES OF SALT FLOW, IMPLICATIONS TO NUCLEAR-WA TE ISOLATION AND PETROLEUM EXPLO ATION by Steven J. Seni and M. P. A. ackson This work was supported by U.S. Depart ent of Energy and funded under Contract No. DE-AC 7-80ET46617 CONTENTS ABSTRACT . • 00 INTRODUCTION. • 00 Data Base. • 00 Early History of Basin Formation and Infilling • 00 Geometry of Salt Structures • 00 EVOLUTIONARY STAGES OF DOME GROWTH. • 00 Pillow Stage . • 00 Geometry of Overlying Strata . • 00 Geometry of Surrounding Strata • 00 Depositional Facies and Lithostratigraph • 00 Diapir Stage • • 00 Geometry of Surrounding Strata • 00 Depositional Facies and Lithostratigraph • 00 Post-Diapir Stage • 00 Geometry of Surrounding Strata • 00 Depositional Facies and Lithostratigraphy • 00 Holocene Analogues. • 00 Discussion • 00 Significance to Subtle Petroleum Traps • 00 PATTERNS OF SALT MOVEMENT IN TIME AND SPAC • 00 Group 1: Pre-Glen Rose Subgroup (pre-112 Ma) - Periphery of Diapir Province • • 00 Group 2: Glen Rose Subgroup to Washita Group 112 to 98 Ma)- Basin Axis • 00 Group 3: Post-Austin Group (86 to 56 Ma) -- Per phery of Diapir Province • • 00 Initiation and Acceleration of Salt Flow • • 00 Overview of Dome History • • 00 RATES OF SALT MOVEMENT AND DOME GROWTH • • 00 Assumptions • • 00 Proven Propositions. • 00 Unproven Propositions • 00 Incorrect Propositions • • 00 Distinguishing Between Syndepositional and Post-D positional Thickness Variations. • 00 The Problem • • 00 Structural Evidence • • 00 Sedimentological Evidence • • 00 Methodology • • 00 Distinguishing Between Regional and Salt-Re ated Thickness Variations. • 00 Volume of Salt Mobilized and Estimates of S t Loss • 00 Rates of Dome Growth • • 00 Net Rates of Pillow Growth • 00 Net Rates of Diapir Growth • 00 Gross Rates of Diapir Growth • • 00 Growth Rates and Strain Rates • 00 IMPLICA TIONS TO WASTE ISOLATION • • 00 CONCLUSIONS • • 00 ACKNOWLEDGMENTS • • 00 REFERENCES • 00 APPENDICES • 00 Figures 1. -
Influences of Surface Processes on Fold Growth During 3D Detachment
PUBLICATIONS Geochemistry, Geophysics, Geosystems RESEARCH ARTICLE Influences of surface processes on fold growth during 3-D 10.1002/2014GC005450 detachment folding Key Point: M. Collignon1, B. J. P. Kaus2, D. A. May3, and N. Fernandez2 Influences of surface processes on the fold pattern in fold-and-thrust 1Geological Institute, ETH Zurich, Zurich, Switzerland, 2Institut fur€ Geowissenschaften, Johannes Gutenberg-Universit€at, belts Mainz, Germany, 3Institute of Geophysics, ETH Zurich, Zurich, Switzerland Correspondence to: M. Collignon, Abstract In order to understand the interactions between surface processes and multilayer folding sys- [email protected] tems, we here present fully coupled three-dimensional numerical simulations. The mechanical model repre- sents a sedimentary cover with internal weak layers, detached over a much weaker basal layer representing Citation: salt or evaporites. Applying compression in one direction results in a series of three-dimensional buckle folds, Collignon, M., B. J. P. Kaus, D. A. May, and N. Fernandez (2014), Influences of of which the topographic expression consists of anticlines and synclines. This topography is modified through surface processes on fold growth time by mass redistribution, which is achieved by a combination of fluvial and hillslope erosion, as well as during 3-D detachment folding, deposition, and which can in return influence the subsequent deformation. Model results show that surface Geochem. Geophys. Geosyst., 15, doi:10.1002/2014GC005450. processes do not have a significant influence on folding patterns and aspect ratio of the folds. Nevertheless, erosion reduces the amount of shortening required to initiate folding and increases the exhumation rates. Received 9 JUN 2014 Increased sedimentation in the synclines contributes to this effect by amplifying the fold growth rate by grav- Accepted 29 JUL 2014 ity. -
Bedrock Geology of Altenburg Quadrangle, Jackson County
BEDROCK GEOLOGY OF ALTENBURG QUADRANGLE Institute of Natural Resource Sustainability William W. Shilts, Executive Director JACKSON COUNTY, ILLINOIS AND PERRY COUNTY, MISSOURI STATEMAP Altenburg-BG ILLINOIS STATE GEOLOGICAL SURVEY E. Donald McKay III, Interim Director Mary J. Seid, Joseph A. Devera, Allen L. Weedman, and Dewey H. Amos 2009 360 GEOLOGIC UNITS ) ) ) 14 Qal Alluvial deposits ) 13 18 Quaternary Pleistocene and Holocene 17 360 ) 15 360 16 14 0 36 ) 13 Qf Fan deposits ) Unconformity Qal ) & 350 tl Lower Tradewater Formation Atokan ) ) Pennsylvanian 360 ) &cv Caseyville Formation Morrowan 24 360 ) Unconformity ) 17 Upper Elviran undivided, Meu ) Waltersburg to top of Degonia 19 20 Qal 21 22 23 ) 24 ) Mv Vienna Limestone 360 o ) 3 Mts ) 350 Mts Tar Springs Sandstone ) 20 360 ) Mgd 360 30 ) Mgd Glen Dean Limestone ) 21 350 360 Mts 29 ) Qal Hardinsburg Sandstone and J N Mhg Chesterian ) Golconda Formations h Æ Qal Mav anc 28 27 Br ) N oJ 26 25 JN 85 N ) Cypress Sandstone through J Mcpc Dsl 500 Paint Creek Formation JN N ) J o Mts N 5 J s ) Dgt 600 J N 70 J N Mgd Yankeetown Formation s ) Myr Db 80 28 Æ and Renault Sandstone N J 29 N J N ) Sb J Mgd Mississippian o Dgt Ssc 25 Clines o N 25 Msg 27 ) Qal J 80 s 3 Mav Aux Vases Sandstone N J N Mts o MILL J MISSISSIPPI 34 ) Qal J N ) N J Dsl 35 N 26 J o N 25 J Mgd Mgd ) Msg Ste. Genevieve Limestone 500 o Db DITCH J 20 Mgd N N N ) J J o RIVER o N 600 J 80 N ) 10 o J Mav Æ Msl St. -
Reflection Seismic Profiling of the Wabash Valley Fault System in the Illinois Basin
Reflection Seismic Profiling of the Wabash Valley Fault System in the Illinois Basin U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1538-0 MISSOURI ~"3t3fc: «tr- ^t-i. ARKANSAS Cover. Gray, shaded-relief map of magnetic anomaly data. Map area includes parts of Missouri, Illinois, Indiana, Kentucky, Tennessee, and Arkansas. Illumination is from the west. Figure is from Geophysical setting of the Reelfoot rift and relations between rift structures and the New Madrid seismic zone, by Thomas G. Hildenbrand and John D. Hendricks (chapter E in this series). Reflection Seismic Profiling of the Wabash Valley Fault System in the Illinois Basin By R.M. Rene and F.L. Stanonis INVESTIGATIONS OF THE NEW MADRID SEISMIC ZONE Edited by Kaye M. Shedlock and Arch C. Johnston U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1538-O This research was jointly supported by the U.S. Geological Survey and ARPEX (Industrial Associates' Research Program in Exploration Seismology—Indiana University, University of Southern Indiana, Indiana Geological Survey) UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1995 U.S. DEPARTMENT OF THE INTERIOR BRUCE BABBITT, Secretary U.S. GEOLOGICAL SURVEY Gordon P. Eaton, Director For sale by U.S. Geological Survey, Information Services Box 25286, Federal Center Denver, CO 80225 Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government Library of Congress Cataloging-in-Publication Data Rene, R.M. Reflection seismic profiling of the Wabash Valley fault system in the Illinois Basin / by R.M. Rend and F.L. Stanonis. p. cm.—(U.S. -
Preliminary Geological Feasibility Report
R. L. LANGENHEfM, JR. EGN 111 DEPT. GEOL. UNIV. ILLINOIS 234 N.H. B., 1301 W. GREEN ST. URBANA, ILLINOIS 61801 Geological-Geotechnical Studies for Siting the Superconducting Super Collider in Illinois Preliminary Geological Feasibility Report J. P. Kempton, R.C. Vaiden, D.R. Kolata P.B. DuMontelle, M.M. Killey and R.A. Bauer Maquoketa Group Galena-Platteville Groups Illinois Department of Energy and Natural Resources ENVIRONMENTAL GEOLOGY NOTES 111 STATE GEOLOGICAL SURVEY DIVISION 1985 Geological-Geotechnical Studies for Siting the Superconducting Super Collider in Illinois Preliminary Geological Feasibility Report J.P. Kempton, R.C. Vaiden, D.R. Kolata P.B. DuMontelle, M.M. Killey and R.A. Bauer ILLINOIS STATE GEOLOGICAL SURVEY Morris W. Leighton, Chief Natural Resources Building 615 East Peabody Drive Champaign, Illinois 61820 ENVIRONMENTAL GEOLOGY NOTES 111 1985 Digitized by the Internet Archive in 2012 with funding from University of Illinois Urbana-Champaign http://archive.org/details/geologicalgeotec1 1 1 kemp 1 INTRODUCTION 1 Superconducting Super Collider 1 Proposed Site in Illinois 2 Geologic and Hydrogeologic Factors 3 REGIONAL GEOLOGIC SETTING 5 Sources of Data 5 Geologic Framework 6 GEOLOGIC FRAMEWORK OF THE ILLINOIS SITE 11 General 1 Bedrock 12 Cambrian System o Ordovician System o Silurian System o Pennsylvanian System Bedrock Cross Sections 18 Bedrock Topography 19 Glacial Drift and Surficial Deposits 21 Drift Thickness o Classification, Distribution, and Description of the Drift o Banner Formation o Glasford Formation -
Bedrock Geology of Dixon West Quadrangle
STATEMAP Dixon West-BG Bedrock Geology of Dixon West Quadrangle Lee County, Illinois Dennis R. Kolata 2013 Prairie Research Institute ILLINOIS STATE GEOLOGICAL SURVEY 615 East Peabody Drive Champaign, Illinois 61820-6964 (217) 244-2414 http://www.isgs.illinois.edu © 2013 University of Illinois Board of Trustees. All rights reserved. For permission information, contact the Illinois State Geological Survey. INTRODUCTION STRATIGRAPHY The Dixon West Quadrangle is situated in northwestern Lee Bedrock in the Dixon West Quadrangle consists largely of County, Illinois. It encompasses the western parts of the city Ordovician dolomite and shale and a small area of Silurian of Dixon, which is the largest town in the county. Most of the dolomite in the southwestern part of the quadrangle. It has land is used for agricultural purposes but a moderate amount been standard practice of the ISGS during the past few of residential and commercial developments are present. decades to follow the Ordovician classification and nomen- clature proposed by Templeton and Willman (1963). Their The quadrangle lies in the Rock River Hill Country of the stratigraphy was followed in large part by Willman and Ko- Central Lowlands Province. The topography formed primar- lata (1978) who made minor revisions to some members and ily by deposition of glacial sediments (clay, silt, sand, and documented the presence of nine widespread K-bentonite gravel) in a till plain which was subsequently dissected by beds. These stratigraphic investigations have shown that the erosional processes of the Rock River and its tributaries. Upper Ordovician carbonate succession consists of distinc- Bedrock in the Dixon West Quadrangle is largely concealed tive rock units that can be traced over wide areas of the beneath the till plain except for local exposures along the riv- Midcontinent U.S. -
Catskill Trails, 9Th Edition, 2010 New York-New Jersey Trail Conference
Catskill Trails, 9th Edition, 2010 New York-New Jersey Trail Conference Index Feature Map (141N = North Lake Inset) Acra Point 141 Alder Creek 142, 144 Alder Lake 142, 144 Alder Lake Loop Trail 142, 144 Amber Lake 144 Andrus Hollow 142 Angle Creek 142 Arizona 141 Artists Rock 141N Ashland Pinnacle 147 Ashland Pinnacle State Forest 147 Ashley Falls 141, 141N Ashokan High Point 143 Ashokan High Point Trail 143 Ashokan Reservoir 143 Badman Cave 141N Baldwin Memorial Lean-To 141 Balsam Cap Mountain (3500+) 143 Balsam Lake 142, 143 Balsam Lake Mountain (3500+) 142 Balsam Lake Mountain Fire Tower 142 Balsam Lake Mountain Lean-To 142, 143 Balsam Lake Mountain Trail 142, 143 Balsam Lake Mountain Wild Forest 142, 143 Balsam Mountain 142 Balsam Mountain (3500+) 142 Bangle Hill 143 Barkaboom Mountain 142 Barkaboom Stream 144 Barlow Notch 147 Bastion Falls 141N Batavia Kill 141 Batavia Kill Lean-To 141 Batavia Kill Recreation Area 141 Batavia Kill Trail 141 Bear Hole Brook 143 Bear Kill 147 Bearpen Mountain (3500+) 145 Bearpen Mountain State Forest 145 Beaver Kill 141 Beaver Kill 142, 143, 144 Beaver Kill Range 143 p1 Beaver Kill Ridge 143 Beaver Meadow Lean-To 142 Beaver Pond 142 Beaverkill State Campground 144 Becker Hollow 141 Becker Hollow Trail 141 Beech Hill 144 Beech Mountain 144 Beech Mountain Nature Preserve 144 Beech Ridge Brook 145 Beecher Brook 142, 143 Beecher Lake 142 Beetree Hill 141 Belleayre Cross Country Ski Area 142 Belleayre Mountain 142 Belleayre Mountain Lean-To 142 Belleayre Ridge Trail 142 Belleayre Ski Center 142 Berry Brook -
*S*->^R*>*:^" class="text-overflow-clamp2"> U.S. GEOLOGICAL SURVEY BULLETIN 2085-A R^C I V"*, *>*S*->^R*>*:^
Stratigraphy, Sedimentology, and Provenance of the Raging River Formation (Early? and Middle Eocene), King County, Washington U.S. GEOLOGICAL SURVEY BULLETIN 2085-A r^c i V"*, *>*s*->^r*>*:^ l1^ w >*': -^- ^^1^^"g- -'*^t» *v- »- -^* <^*\ ^fl' y tf^. T^^ ?iM *fjf.-^ Cover. Steeply dipping beds (fluvial channel deposits) of the Eocene Puget Group in the upper part of the Green River Gorge near Kanaskat, southeastern King County, Washington. Photograph by Samuel Y. Johnson, July 1992. Stratigraphy, Sedimentology, and Provenance of the Raging River Formation (Early? and Middle Eocene), King County, Washington By Samuel Y. Johnson and Joseph T. O'Connor EVOLUTION OF SEDIMENTARY BASINS CENOZOIC SEDIMENTARY BASINS IN SOUTHWEST WASHINGTON AND NORTHWEST OREGON Samuel Y. Johnson, Project Coordinator U.S. GEOLOGICAL SURVEY BULLETIN 2085-A A multidisciplinary approach to research studies of sedimentary rocks and their constituents and the evolution of sedimentary basins, both ancient and modern UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1994 U.S. DEPARTMENT OF THE INTERIOR BRUCE BABBITT, Secretary U.S. GEOLOGICAL SURVEY Gordon P. Eaton, Director For sale by U.S. Geological Survey, Map Distribution Box 25286, MS 306, Federal Center Denver, CO 80225 Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government Library of Congress Cataloging-in-Publication Data Johnson, Samuel Y. Stratigraphy, sedimentology, and provenance of the Raging River Formation (Early? and Middle Eocene), King County, Washington/by Samuel Y. Johnson and Joseph T. O'Connor. p. cm. (U.S. Geological Survey bulletin; 2085) (Evolution of sedimentary basins Cenozoic sedimentary basins in southwest Washington and northwest Oregon; A) Includes bibliographical references. -
Appendix 1. State Geologic Maps Bibliography
18 The State Geologic Map Compilation (SGMC) Geodatabase of the Conterminous United States Appendix 1. State Geologic Maps Bibliography The citations presented here are for the paper versions of the State geologic maps with a U.S. Geological Survey (USGS) National Geologic Map Database (NGMDB) URL link provided for convenience. The sources for all data in the State Geologic Map Compilation (SGMC) are the original USGS Preliminary Integrated Geologic Map Databases (PIGMD) unless otherwise noted. Please see the PIGMD citation provided for more detailed geologic map source information. Alabama (AL)—Scale 1:250,000 Osbourne, W.E., Szabo, M.W., Neathery, T.L., and Copeland, C.W., Jr., 1988, Geologic map of Alabama—Northeast sheet: Geological Survey of Alabama Special Map 220, scale 1:250,000. Szabo, M.W., and Copeland, C.W., Jr., 1988, Geologic map of Alabama—Southeast sheet: Geological Survey of Alabama Special Map 220, scale 1:250,000. Szabo, M.W., and Copeland, C.W., Jr., 1988, Geologic map of Alabama—Southwest sheet: Geological Survey of Alabama Special Map 220, scale 1:250,000. Szabo, M.W., Osbourne, W.E., and Copeland, C.W., Jr., 1988, Geologic map of Alabama—Northwest sheet: Geological Survey of Alabama Special Map 220, scale 1:250,000. NGMDB—Available at https://ngmdb.usgs.gov/Prodesc/proddesc_55859.htm. PIGMD—Available at https://pubs.usgs.gov/of/2005/1323/#AL. Arizona (AZ)—scale 1:1,000,000 Richard, S.M., Reynolds, S.J., Spencer, J.E., and Pearthree, P.A., 2000, Geologic map of Arizona: Arizona Geological Survey Map 35, 1 sheet, scale 1:1,000,000. -
Proceedings of the Indiana Academy of Science
Geologic Contrasts in Indiana State Parks Otis W. Freeman, Indiana University The state parks of Indiana, with sites selected largely for scenic and historic reasons but partly with the intent to secure wide geo- graphical distribution for recreational purposes, contain a fairly com- plete sequence of the geological formations outcropping in the state, besides providing examples for a large majority of the physiographic principles. Evidence of vulcanism is one of the chief things missing, since all of the exposed bedrock in Indiana is of sedimentary origin. Even so, many types of igneous and metamorphic rocks can be picked up among the glacial boulders in the northern part of the state. The oldest exposed rocks are those of the Ordovician period. Ex- cellent outcrops for the study of the Ordovician strata occur in south- eastern Indiana on the west flank of the Cincinnati Arch. The beds are highly fossiliferous and one of the famous collecting grounds for the life forms of this period is near Madison. Clifty Falls State Park includes strata classified in the upper Or- dovician, the Silurian and base of the Devonian periods. The Silurian rocks occupy the hill slopes above the falls and inner gorges in the park with the Devonian capping the higher hills. The Ordovician formations in the park area from the base up- ward, begin with 25 feet of the Bellevue, followed by 115 feet of the Arnheim, 55 feet of the Waynesville, 50 feet of the Liberty, about 32 feet of the Saluda and possibly 6 feet of Whitewater. Shale predominates from the Bellevue through the Liberty and is interbedded with thin layers and lenses of limestone, and in contrast the Saluda is a thick bedded limestone with reef corals occuring near its base.