GSA 2020 Connects Online

Session No. 80
Tuesday, 27 October 2020: 1:30 PM-5:30 PM

T92. Structure and Dynamics of the Appalachian Orogen

GSA Geophysics and Geodynamics Division; GSA Structural Geology and Tectonics Division

 

Fiona Darbyshire, Yvette Kuiper, Maureen D. Long, Rob L. Evans and Scott D. King, Advocates
Paper #
Start Time
 
1:30 PM
Introductory Remarks
1:35 PM
SALT TECTONICS IN A STRIKE-SLIP BASIN: BAY ST. GEORGE SUBBASIN, NEWFOUNDLAND, CANADA (Invited Presentation)
SNYDER, M.E., Earth and Environmental Science, Acadia University, 12 University Avenue, Wolfville, NS B4P2R6, Canada and WALDRON, John W.F., Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB T6G2E3, Canada
1:50 PM
USING CONSTRAINED 3-D GRAVITY INVERSION TO INVESTIGATE ALONG-STRIKE ONSHORE TO OFFSHORE CRUSTAL-SCALE APPALACHIAN OROGENIC TRENDS IN ATLANTIC CANADA
WELFORD, J. Kim, Earth Science, Memorial University of Newfoundland, St. John's, NF A1B3B5, Canada and WALDRON, John W.F., Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB T6G2E3, Canada
2:05 PM
CRUSTAL STRUCTURE OF EASTERN CANADA AND NE USA FROM AMBIENT NOISE TOMOGRAPHY
BAGHERPUR MOJAVER, Omid and DARBYSHIRE, Fiona, Geotop, University of Quebec at Montreal, CP8888 succursale Centre-Ville, Montreal, QC H3C3P8, Canada
2:20 PM
VELOCITY VARIATIONS IN THE UPPER CRUST NEAR THE 2011 MINERAL EARTHQUAKE, CENTRAL VIRGINIA SEISMIC ZONE, VIRGINIA, USA
ISLAM, S.M. Ariful and POWELL, Christine, University of Memphis, Center for Earthquake Research and Information, 3890 Central Ave, Memphis, TN 38152
 
2:35 PM
Discussion
2:45 PM
THE ENIGMATIC GOOCHLAND TERRANE, VIRGINIA: A TALE OF ACCRETION, TRANSPRESSION, AND RAPID EXHUMATION IN THE APPALACHIAN PIEDMONT
BAILEY, Christopher M.1, FOSTER-BARIL, Zachary2, DUKE, Hope J.1 and STOCKLI, Daniel F.3, (1)Department of Geology, William & Mary, Williamsburg, VA 23187, (2)University of Texas at Austin, 2501 Speedway, Austin, TX 78712, (3)Department of Geological Sciences, Jackson School of Geosciences, The University of Texas at Austin, Austin, TX 78712
3:00 PM
TESTING THE APPLICABILITY OF THE CHANNEL FLOW MODEL IN THE SOUTHERN APPALACHIAN INNER PIEDMONT USING INTEGRATED ISOCHEMICAL PSUEDOSECTION MODELING AND GEOCHRONOLOGY
POWELL, Nicholas E.1, THIGPEN, J. Ryan1, STOWELL, Harold H.2, MOECHER, Dave1 and MERSCHAT, Arthur J.3, (1)Department of Earth and Environmental Sciences, University of Kentucky, Lexington, KY 40506, (2)Geological Sciences, University of Alabama, Tuscaloosa, AL 35487, (3)U.S. Geological Survey, MS 926A National Center, Reston, VA 20192
3:15 PM
EARLY CRETACEOUS POSTRIFT MAGMATISM AND NORMAL FAULTING IN THE NORTHERN APPALACHIANS: IMPLICATIONS FOR THE EVOLUTION OF THE EASTERN NORTH AMERICAN MARGIN
COOPER BOEMMELS, Jennifer, Department of Earth Science, Southern Connecticut State University, 501 Crescent Street, New Haven, CT 06515, CRESPI, Jean, Department of Geosciences, University of Connecticut, Storrs, CT 06269, AMIDON, William H., Department of Geology, Middlebury College, 14 Old Chapel Road, Middlebury, VT 05753, FLEMING, Thomas H., Department of Earth Sciences, Southern Connecticut State University, 501 Crescent Street, New Haven, CT 06515 and WEBB, Laura E., Geology, University of Vermont, 180 Colchester Ave., Burlington, VT 05405
3:30 PM
DISTINGUISHING ACADIAN DEFORMATIONAL SIGNATURES IN THE MULTIPLY-DEFORMED CHAMPLAIN VALLEY
WASHINGTON, Paul A., Salona Exploration LLC, 27 Firehouse Road, Mill Hall, PA 17751 and CHISICK, Steven A., 22660 South Cicero Ave. #227, Richton Park, IL 60471
 
3:45 PM
Discussion 2
3:55 PM
UHP, UHT, AND HPG METAMORPHISM IN THE ACADIAN/NEOACADIAN OROGEN, APPALACHIANS: INDICATORS AND IMPLICATIONS
KELLER, Duncan S. and AGUE, Jay J., Department of Earth and Planetary Sciences, Yale University, POB 208109, New Haven, CT 06520-8109
4:10 PM
MAGNETOTELLURIC INSIGHTS INTO THE LITHOSPHERIC ARCHITECTURE AND GEODYNAMIC HISTORY OF THE APPALACHIAN DOMAIN (Invited Presentation)
MURPHY, Benjamin S., USGS, Geomagnetism Program, Golden, CO 80401; USGS, Geology, Geophysics, and Geochemistry Science Center, Denver, CO 80225, EGBERT, Gary D., College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, 104 COAS Admin. Bldg, Corvallis, OR 97331-5503, BEDROSIAN, Paul A., USGS, Geology, Geophysics, and Geochemistry Science Center, Denver, CO 80225 and KELBERT, Anna, USGS, Geomagnetism Program, Golden, CO 80401
4:25 PM
THE GEODYNAMIC IMPLICATIONS OF THE CENTRAL APPALACHIAN ANOMAL
KING, Scott D.1, LONG, Maureen D.2, WAGNER, Lara3, EVANS, Rob L.4, MAZZA, Sarah E.5, BYRNES, Joseph6, KIRBY, Eric7, GAZEL, Esteban8, JOHNSON, Elizabeth A.9, BEZADA, Maximiliano10, ARAGON, John C.2, LIU, Shangxin11 and MILLER, Scott R.12, (1)Department of Geosciences, Virginia Tech, Blacksburg, VA 24060, (2)Department of Earth and Planetary Sciences, Yale University, New Haven, CT 06520, (3)Dtm, Carnegie Institution of Washington, 5241 Brad Branch Road, NW, Washington, DC 20015-1305, (4)Geology and Geophysics, Woods Hole Oceanographic Institution, Clark South 172, MS 24, Woods Hole, MA 02543, (5)Department of Geosciences, Smith College, Northampton, MA 01063, (6)University of Minnesota, Minneapolis, MN 55455, (7)College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331, (8)Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY 14853, (9)Department of Geology and Environmental Science, James Madison University, Harrisonburg, VA 22807, (10)Earth Sciences, University of Minnesota, 310 Pillsbury Drive SE, Minneapolis, MN 55455, (11)Department of Geosciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24060, (12)Department of Geology and Geophysics, University of Utah, Salt Lake City, UT 84112
4:40 PM
COMPLEX SHEAR-WAVE SPLITTING INDICATES SIMPLE ANISOTROPY IN THE LITHOSPHERE AND ASTHENOSPHERE BENEATH THE APPALACHIAN OROGEN (Invited Presentation)
FISCHER, Karen M.1, MACDOUGALL, Julia G.1, GENG, Yichen1, WAGNER, Lara S.2 and HAWMAN, Robert B.3, (1)Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI 02912, (2)Earth and Planets Laboratory, Carnegie Institution of Washington, Washington DC, DC 20015, (3)Department of Geology, University of Georgia, Athens, GA 30602
 
4:55 PM
Discussion 3
5:05 PM
THE EFFECT OF SYNTECTONIC LOADING ON THE DEVELOPMENT AND STRUCTURAL ARCHITECTURE OF A FOLD-AND-THRUST BELT: AN EXAMPLE FROM THE CENTRAL APPALACHIANS
EVANS, Mark A., Department of Geological Sciences, Central Connecticut State Univ, 1615 Stanley St, New Britain, CT 06050
5:15 PM
LINKS BETWEEN THRUST-RELATED DEFORMATION AT DEEP AND SHALLOW LEVELS, OVER 100 KM NORTH OF THE ALLEGHANY FRONT, TOMPKINS COUNTY, NEW YORK STATE
JORDAN, Teresa E.1, BROWN, Larry D.1, ALLMENDINGER, Richard W.1, MAY, Daniel F.2 and PRITCHARD, Matthew E.1, (1)Earth and Atmospheric Sciences, Cornell University, Snee Hall, Ithaca, NY 14853, (2)Civil Engineering and Geosciences, Delft University of Technology, Delft, NY 2628, Netherlands
 
5:25 PM
Concluding Remarks
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