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Technical Sessions Meeting policy prohibits the use of cameras A no-smoking policy has been established by the AM or sound-recording equipment at technical Program Committee and will be followed in all sessions and poster sessions. meeting rooms for technical sessions. NOTICE In the interest of public information, the Geological Society of America provides a forum for the presentation of diverse opinions and positions. The opinions (views) expressed by speakers and exhibitors at these sessions are their own and do not necessarily represent the views or policies of the Geological Society of America. SUNDAY NOTE INDEX SYSTEM * INDUSTRY TRACKS Numbers (3-4, 15-4) indicate session and Look for these icons to identify sessions relevant to applied order of presentation within that session. geoscientists: *denotes speaker Economic Geology Energy Engineering Geology Hydrogeology and Environmental Geology SUNDAY, 22 SEPTEMBER 2019 THE CAMBRIAN AND ORDOVICIAN RADIATION OF MORNING ECHINODERMS ORAL TECHNICAL SESSIONS 1-7 9:30 AM Blake, Daniel B.*; Gahn, Forest J.; Guensburg, Thomas E.: AN EARLY ORDOVICIAN (FLOIAN) ASTEROZOAN SESSION NO. 1 (ECHINODERMATA) OF PROBLEMATIC CLASS-LEVEL AFFINITIES D19. Paleontology: Invertebrate Paleobiology 1-8 9:45 AM Sumrall, Colin D.*; Botting, Joseph P.: THE OLDEST 8:00 AM, Phoenix Convention Center, Room 227ABC, North Building RECORD OF RHENOPYRGID EDRIOASTEROIDS, FROM Brandt M. Gibson and Katherine Turk, Presiding THE EARLY ORDOVICIAN FEZOUATA FORMATION OF 1-1 8:00 AM O’Neil, Gretchen R.*; Tackett, Lydia S.: PRESERVATIONAL MOROCCO, NORTH AFRICA BIASES IN TRACES AND BODY FOSSILS OF WESTERN 1-9 10:00 AM Devera, Joseph*; M’Hamdi, Hassane: COMPOSITE SEA UNITED STATES PRECAMBRIAN-CAMBRIAN STAR REPICHNIA/CUBICHNIA AND ASSOCIATED BOUNDARY-SPANNING UNITS ICHNOFOSSILS FROM UPPER ORDOVICIAN 1-2 8:15 AM Handkamer, Neal M.*; Pratt, Brian R.; MacNaughton, SILTSTONES WITHIN THE KTAOUA GROUP, RAMLIA, Robert B.: LOWER TO MIDDLE (LATE DYERAN–MIDDLE MOROCCO DELAMARAN) CAMBRIAN STRATIGRAPHY AND 1-10 10:15 AM Sain, Colby E.*; Smith, Nicholas S.; Sumrall, Colin D.: TRILOBITE BIOSTRATIGRAPHY OF THE MOUNT COMPARING MORPHOLOGICAL DIFFERENCES IN CLARK AND MOUNT CAP FORMATIONS, EASTERN MISSISSIPPIAN OPHIUROID ARM OSSICLES MACKENZIE MOUNTAINS, NORTHWESTERN CANADA 1-11 10:30 AM Swisher, Robert*; Lin, Jih-Pai: APPLYING GEOMETRIC 1-3 8:30 AM Gaines, Robert R.*; Caron, Jean-Bernard; Nanglu, Karma; MORPHOMETRIC ANALYSIS TO ASSESS Hammarlund, Emma; Holzer, Iris; Lombardo, Alexander J.; MORPHOLOGICAL AND ONTOGENETIC VARIATION IN Canfield, Donald E.:PRESERVATION OF THE BURGESS CLYPEASTEROID ECHINOIDS; AN EXAMINATION OF SHALE BIOTA FROM MARBLE CANYON ARACHNOIDES PLACENTA 1-4 8:45 AM Wernette, Shelly J.*; Hughes, Nigel C.; Myrow, Paul M.; 1-12 10:45 AM Smith, Nicholas S.*; Sumrall, Colin D.: IMPROVING OUR Sardsud, Apsorn: ASHES AND TRILOBITES IN UNDERSTANDING OF BRITTLE STAR (OPHIUROIDEA: THAILAND: THE KEY TO DATING THE CAMBRIAN- ECHINODERMATA) BIODIVERSITY: RECONCILING ORDOVICIAN BOUNDARY DISARTICULATED SKELETAL ELEMENTS WITH 1-5 9:00 AM Gahn, Forest J.*: PLESIOMORPHIC CHARACTER STATES ARTICULATED SKELETONS AMONG THE EARLIEST CRINOIDS 1-13 11:00 AM Aubry, Marie-Pierre*: PHYLOGENETIC TREES IN 1-6 9:15 AM Novack-Gottshall, Philip M.*; Sultan, Ali; Ranjha, Isa; COCCOLITHOPHORES: TELLTALES OF DIFFERENTIAL Purcell, Jack Nathan; Deline, Bradley: PHYLOGENETIC EVOLVABILITY AMONG CLADES CONSTRAINT AND ECOLOGICAL OPPORTUNITY IN 22–25 September • Phoenix, Arizona, USA | 147 Sunday, 22 September 2019 1-14 11:15 AM Lebel, Caitlin P.*; Cotton, Laura J.: LARGER BENTHIC 2-12 11:30 AM Fenerty, Brendan*; Ridinghafer, Jacob; Lizarazu, Iaos; FORAMINIFERA OF THE EOCENE-OLIGOCENE OF McGuire, Luke; Rasmussen, Craig; Youberg, Ann M.: FLORIDA QUANTIFYING THE SPATIAL DISTRIBUTION OF 1-15 11:30 AM Johnson, Erynn H.*; Anderson, Brendan M.; Allmon, PYROGENIC CARBON FOLLOWING THE 2018 BUZZARD Warren D.: AN EMPIRICAL TEST OF 3D PRINTED FIRE IN THE GILA NATIONAL FOREST, NEW MEXICO TURRITELLINE SHELLS: DOES DIFFERENTIAL 2-13 11:45 AM Keller, Edward A.*; Adamaitis, Chandler; Alessio, Paul: DISTRIBUTION OF ORNAMENTATION INCREASE DEBRIS FLOW PATH CHANGE IN RESPONSE TO SHELL STRENGTH? TOPOGRAPHY AND ACTIVE TECTONIC PROCESSES: 1-16 11:45 AM Hendricks, Jonathan R.*: EVER SINCE MAURY: PRI’S IMPLICATIONS FOR HAZARD EXPOSURE “NEOGENE PALEONTOLOGY OF THE NORTHERN DOMINICAN REPUBLIC” PUBLICATION SERIES AND SESSION NO. 3 THE SYSTEMATIC WORK THAT REMAINS T12. Cordilleran Ice Sheet through the Quaternary: Chronology, Paleoenvironments, and Implications (GSA Quaternary Geology SESSION NO. 2 and Geomorphology Division) T5. Geomorphic and Hydrologic Processes in Post-Wildfire 8:00 AM, Phoenix Convention Center, Room 221AB, North Building Environments: Drivers, Impacts, and Hazards (GSA Quaternary Brent C. Ward and Alia J. Lesnek, Presiding Geology and Geomorphology Division; GSA Soils and Soil Processes Division) 8:00 AM INTRODUCTORY REMARKS 8:00 AM, Phoenix Convention Center, Room 224A, North Building 3-1 8:05 AM Clague, John J.*: THE CORDILLERAN ICE SHEET IN SPACE AND TIME (Invited Presentation) Luke McGuire, Ann M. Youberg, Jason Williams and Joel B. Sankey, Presiding 3-2 8:25 AM Spencer, Joel*; Spencer, Trevor: NEW CHRONOLOGICAL 8:00 AM INTRODUCTORY REMARKS DATA ON THE FURTHEST EXTENT OF THE 2-1 8:15 AM Staley, Dennis M.*; Smith, Joel B.; Kean, Jason W.; SOUTHEASTERN FLATHEAD LOBE OF THE Rengers, Francis K.: RAINFALL MICROSTRUCTURE AND CORDILLERAN ICE SHEET FROM LUMINESCENCE DEBRIS-FLOW GENERATION IN A RECENTLY BURNED STUDIES OF GLACIO-DELTAIC AND MORAINE WATERSHED (Invited Presentation) DEPOSITS, FLATHEAD VALLEY, MONTANA 2-2 8:35 AM McGuire, Luke*; Youberg, Ann M.: REFINING 3-3 8:40 AM Gombiner, Joel H.*; Stone, John O.; Horton, THRESHOLDS FOR RUNOFF-GENERATED DEBRIS Elizabeth J.: GSA QUATERNARY GEOLOGY AND FLOWS: INSIGHTS FROM A RECENTLY BURNED AREA GEOMORPHOLOGY DIVISION J. HOOVER MACKIN IN THE GILA NATIONAL FOREST, NEW MEXICO, USA AWARD: ENIGMATIC MOSES COULEE MEGAFLOODS 2-3 8:50 AM Guilinger, James J.*; Gray, Andrew B.; Barth, Nicholas C.: 3-4 8:55 AM Wilson, Alexander M.*; Russell, J. Kelly; Ward, THE EVOLUTION AND DEPLETION OF SEDIMENT Brent C.: PALEO-GLACIER RECONSTRUCTION IN POOLS IN A STEEP HEADWATER CATCHMENT SOUTHWESTERN BRITISH COLUMBIA, CANADA: A FOLLOWING WILDFIRE AS DOCUMENTED BY HIGH GLACIOVOLCANIC MODEL RESOLUTION CHANGE DETECTION 3-5 9:10 AM Ashworth, Allan C.*; Thackray, Glenn D.; Gavin, 2-4 9:05 AM DiBiase, Roman A.*; Lamb, Michael P.: DRY RAVEL Daniel G.: GSA QUATERNARY GEOLOGY AND LOADING OF STEEP HEADWATER VALLEY NETWORKS GEOMORPHOLOGY DIVISION DISTINGUISHED FUELS POST-WILDFIRE SEDIMENTATION HAZARDS IN CAREER AWARD: CLIMATE OF THE WESTERN SOUTHERN CALIFORNIA OLYMPIC PENINSULA, NW U.S.A., DURING THE LATTER 2-5 9:20 AM Rengers, Francis K.*; Kean, Jason W.; Staley, Dennis M.; PART OF MIS 2 (LAST GLACIAL MAXIMUM) McGuire, Luke: DISTINGUISHING POST-FIRE DEBRIS 3-6 9:40 AM Clark, Douglas H.*; Clague, John J.: DOING THE LATE- FLOW EROSIONAL AND DEPOSITIONAL ZONES IN A GLACIAL WATUSI: RESOLVING THE INTERPLAY BURNED WATERSHED BETWEEN THE CORDILLERAN ICE SHEET AND 2-6 9:35 AM Murphy, Brendan P.*; Belmont, Patrick; Czuba, Jonathan A.: RELATIVE SEA LEVEL ACROSS THE FRASER POST-WILDFIRE SEDIMENT CASCADES: WATERSHED- LOWLAND DURING TERMINATION 1 SCALE DYNAMICS AND THE VULNERABILITY OF 9:55 AM BREAK RESERVOIRS (Invited Presentation) 3-7 10:10 AM Kennedy, Kristen*; Bennett, Bruce; Ellis, Sarah: 9:55 AM BREAK RESTRICTED GROWTH OF THE NORTHERN 2-7 10:10 AM Kinoshita, Alicia M.*: POST-FIRE VEGETATION, SOIL, AND CORDILLERAN ICE SHEET IN MIS 2: EXAMPLES FROM STREAM PROCESSES IN URBAN MEDITERRANEAN THE KLUANE RANGE, YUKON, CANADA SYSTEMS (Invited Presentation) 3-8 10:25 AM Ward, Brent C.*; Bond, Jeffrey D.; Cronmiller, Derek; 2-8 10:30 AM Tillery, Anne C.*; Moeser, C. David; Trader, Laura; Martin, Turner, Derek; Gosse, John C.; Jensen, Britta J.L.; Froese, Deborah A.: POSTWILDFIRE HYDROLOGIC AND Duane G.: NORTHERN CORDILLERAN ICE SHEET GEOMORPHIC RESPONSE IN A SEVERELY BURNED, DISPLAYS A DIACHRONOUS RESPONSE TO MIS 4 SEMI-ARID WATERSHED: IMPLICATIONS FOR EARLY FORCING, YUKON TERRITORY,CANADA FLOOD-WARNING SYSTEM INSTALLATIONS 3-9 10:40 AM McLaren, Duncan*: SEARCHING FOR EVIDENCE OF 2-9 10:45 AM Almaguer, Alexandra*; Lackey, Hilary Sanders; McCarty, LATE PLEISTOCENE HUMAN OCCUPATION ALONG THE Kyle R.; Lackey, Jade Star: AN INVESTIGATION OF WESTERN MARGIN OF THE CORDILLERAN ICE SHEET TRACE METAL CONCENTRATIONS IN SEDIMENT AND (Invited Presentation) SURFACE WATER OF THE WOOLSEY WILDFIRE AREA, 3-10 11:00 AM Hebda, Christopher F.G.*: LIFE AT THE EDGE OF THE CALIFORNIA ICE: MULTI-PROXY PALAEOECOLOGICAL EVIDENCE 2-10 11:00 AM Beers, Rebecca L.*; Joyal, Taylor J.: CHANNEL REFILL FOR LATE PLEISTOCENE GLACIATION ON NORTHERN PROCESSES FOLLOWING POST-FIRE DEBRIS FLOWS, VANCOUVER ISLAND AND IMPLICATIONS FOR THE PINALENO MOUNTAINS, ARIZONA, USA FIRST PEOPLING OF THE AMERICAS ALONG THE PACIFIC COAST 2-11 11:15 AM Berhe, Asmeret Asefaw*; Abney, Rebecca: POST-FIRE EROSION: IMPLICATIONS FOR LATERAL DISTRIBUTION 3-11 11:15 AM Smith, I. Rod*; Evans, David J.A.; Gosse, John C.: PLIO- AND PERSISTENCE OF PYROGENIC CARBON IN SOILS PLEISTOCENE GLACIAL GEOLOGY OF THE SMOKING OF TEMPERATE FOREST ECOSYSTEMS HILLS, NORTHWESTERN ARCTIC CANADA 148 | 2019 GSA Annual Meeting & Exposition Sunday, 22 September 2019 3-12 11:30 AM Anderson, Robert S.*; Egholm, David L.; Knudsen, Mads F.; 4-13 11:35 AM Wright, Samuel*; Hoisch, Thomas; Wells, Michael; Craddock, Jansen, John D.: NORTHERN HEMISPHERE ICE SHEET Suzanne
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  • 3D Ichnofabrics in Shale Gas Reservoirs

    3D Ichnofabrics in Shale Gas Reservoirs

    3D ICHNOFABRICS IN SHALE GAS RESERVOIRS By @ Małgorzata Bednarz A thesis submitted to the School of Graduate Studies in partial fulfillment of the requirements for the degree of Doctor of Philosophy Department of Earth Sciences Memorial University of Newfoundland October 2014 St. John’s Newfoundland Abstract This PhD research project uses three-dimensional ichnology to address issues of shale- hydrocarbon reservoir quality and provides new tools for ichnofabric analysis and ichnotaxonomic considerations. The study presents deterministic (devoid of conceptual simplifications and interpretations) visualizations of the true spatial geometry of the aff. Chondrites, aff. Phycosiphon and Nereites trace fossils and models the three-dimensional arrangements of the burrow components. The volumetric reconstructions of the real geometry of the trace fossils allowed for their comparison with the previously established visualizations and for reconsideration of pre-existing palaeobiological models. To date three-dimensional understanding of the majority of trace fossils is presented as conceptual drawings available only on two-dimensional media. Such reconstructions are extrapolated mainly from observations of cross sections of burrows from core and outcrop and do not allow for realistic volumetric quantification and full elucidation of complex trace fossil geometries in the context of the host-sediment. The new methodology based on precise serial grinding and volume-visualization presented herein addresses this gap in ichnological knowledge, and is especially useful for examination of the ichnofabric contained in mudstones and muddy siltstones where the application or non-destructive methods of 3D reconstructions as CT scanning or MRI is impossible owing to the rock petrological characteristics (e.g., low burrow-matrix density difference).
  • Crustal-Seismicity.Pdf

    Crustal-Seismicity.Pdf

    Tectonophysics 786 (2020) 228450 Contents lists available at ScienceDirect Tectonophysics journal homepage: www.elsevier.com/locate/tecto Crustal seismicity in the Andean Precordillera of Argentina using seismic broadband data T ⁎ Agostina Venerdinia,b, , Patricia Alvaradoa,b, Jean-Baptiste Ammiratia,1, Marcos Podestaa, Luciana Lópezc, Facundo Fuentesd, Lepolt Linkimere, Susan Beckf a Grupo de Sismotectónica, Centro de Investigaciones de la Geósfera y la Biósfera (Consejo Nacional de Investigaciones Científicas y Técnicas CONICET– Facultad de Ciencias Exactas, Físicas y Naturales, UNSJ), San Juan, Argentina b Departamento de Geofísica y Astronomía, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, San Juan, Argentina c Instituto Nacional de Prevención Sísmica, San Juan, Argentina d YPF S.A., Buenos Aires, Argentina e Escuela Centroamericana de Geología, Universidad de Costa Rica, San José, Costa Rica f Department of Geosciences, University of Arizona, Tucson, AZ, United States ARTICLE INFO ABSTRACT Keywords: In this study, we analyze 100 crustal Precordilleran earthquakes recorded in 2008 and 2009 by 52 broadband Crust seismic stations from the SIEMBRA and ESP, two temporary experiments deployed in the Pampean flat slab Focal mechanism region, between the Andean Cordillera and the Sierras Pampeanas in the Argentine Andean backarc region. Fold-thrust belt In order to determine more accurate hypocenters, focal mechanisms and regional stress orientations, we Andean retroarc relocated 100 earthquakes using the JHD technique and a local velocity model. The focal depths of our relocated Flat slab events vary between 6 and 50 km. We estimated local magnitudes between 0.4 ≤ M ≤ 5.3 and moment South America L magnitudes between 1.3 ≤ Mw ≤ 5.3.
  • Geophysical Evidence for Terrane Boundaries in South-Central Argentina Carlos J

    Geophysical Evidence for Terrane Boundaries in South-Central Argentina Carlos J

    Gondwana Research, G! 7, No. 4, pp. 1105-1 116. 0 2004 International Association for Gondwana Research, Japan. ISSN: 1342-937X Geophysical Evidence for Terrane Boundaries in South-Central Argentina Carlos J. Chernicoff and Eduardo 0. Zappettini2 Council for Scientific and Technical Research (CONICET),Universidad de Buenos Aires, E-mail: [email protected] ' Argentine Geological-Mining Survey (SEGEMAR). Av. Julio A. Roca 651, 8" piso, (1322) Buenos Aires, Argentina, E-mail: [email protected] * Corresponding author (Manuscript received July 24,2003; accepted January 26,2004) Abstract The geological interpretation of high-resolution aeromagnetic data over the La Pampa province, in central Argentina, in addition to lower resolution magnetic information from the region of the Neuquen and Colorado basins, leads to the definition of the precise boundaries of the Chilenia, Cuyania, Pampia and Patagonia terranes, as well as that of the Rio ..... de la Plata Craton, within the study region. The high-resolution aeromagnetic survey data are compared and studied in conjunction with all the available geological information, to produce a map of the solid geology of this region, which is largely covered by Quaternary sediments. A number of structures of different magnitudes, as we11 as their relative chronology, are also recognized, i.e., regional faults, sub-regional faults, fractures and shear zones, as well as the most conspicuous magnetic fabric of the basement that reflects its main planar structures. Three different basements are distinguished on the basis of their contrasting magnetic character, and are interpreted to represent the Cuyania and Pampia terranes and the Rio de la Plata Craton, separated from each other by large-scale discontinuities.