Session: Past and Present Stable Isotopes of the Western U.S. and Beyond (Posters) (Rocky Mountain Section - 73rd Annual Meeting

Session No. 15

Wednesday, 24 May 2023: 8:00 AM-6:00 PM

C/D Ballroom (Lory Student Center)

T10. Past and Present Stable Isotopes of the Western U.S. and Beyond (Posters)

GSA Quaternary Geology and Geomorphology Division

Authors will be present from 3 to 5 PM.

Paper #

Booth #

15-1

ESTIMATING MIOCENE TOPOGRAPHY OF THE DINARIC ALPS USING STABLE-ISOTOPE PALEOALTIMETRY

SANCHEZ ORTIZ, Gabriela¹, LÖBERBAUER, Marlene², ANDRIĆ TOMAŠEVIĆ, Nevena³, MANDIC, Oleg⁴, PAVELIĆ, Davor⁵, DEMIR, Vedad⁶, MEIJERS, Maud² and RUGENSTEIN, Jeremy¹, (1)Department of Geosciences, Colorado State University, Fort Collins, CO 80521, (2)Institute of Earth Sciences, NAWI Graz Geocenter, University of Graz, Graz, Austria, (3)Institute of Applied Geosciences, Karlsruhe Institute of Technology, Karslruhe, Germany, (4)Geological-Paleontological Department, Natural History Museum Vienna, Vienna, Austria, (5)Faculty of Mining, Geology, and Petroleum Engineering, University of Zagreb, Zagreb, Croatia, (6)Federal Institute for Geology - Sarajevo, Ilidža, Bosnia and Herzegovina

15-2

GREAT PLAINS OGALLALA FORMATION STABLE ISOTOPE EVIDENCE FOR THE POSITION OF THE 100^TH MERIDIAN ARIDITY GRADIENT IN THE LATE NEOGENE

MANSER, Livia, Earth Sciences, ETH Zürich, Aepliweg 1, St. Gallen, 9008, SWITZERLAND, KUKLA, Tyler, Geosciences, Colorado State University, Fort Collins, CO 80521; Atmospheric Sciences, University of Washington, Seattle, WA 98195 and RUGENSTEIN, Jeremy, Department of Geosciences, Colorado State University, Fort Collins, CO 80523

15-3

USING CARBON ISOTOPES TO CONSTRAIN C4 EXPANSION FROM BAHIA BLANCA TO MENDOZA IN RESPONSE TO CHANGES IN PRECIPITATION DURING THE LATE MIOCENE

LITTLETON, Shelby¹, COTTON, Jennifer M.¹, HYLAND, Ethan², AZMI, Iffat², RAIGEMBORN, Maria Sol³, TINEO, David³ and INSEL, Nadja⁴, (1)Geological Sciences, California State University, Northridge, Northridge, CA 91330, (2)Dept. of Marine, Earth & Atmospheric Sciences, North Carolina State University, 2800 Faucette Dr., Raleigh, NC 27695, (3)Centro de Investigaciones Geológicas and Facultad de Ciencias Naturales y Museo, CONICET and Universidad Nacional de La Plata, La Plata, C1925, Argentina, (4)Department of Earth Sciences, Northeastern Illinois University, Chicago, IL 60625

15-4

EVALUATING A VARIABLE-RESOLUTION APPROACH FOR SIMULATING WATER ISOTOPES IN THE CONTINENTAL UNITED STATES USING VR-ICESM

MACAREWICH, Sophia, HERRINGTON, Adam, ZHU, Jiang, NUSBAUMER, Jesse, OTTO-BLIESNER, Bette and BRADY, Esther, Climate and Global Dynamics Laboratory, National Center for Atmospheric Research, Boulder, CO 80305

15-5

300 MILLION YEARS OF PEDOGENIC CARBONATES FROM WESTERN NORTH AMERICA: EVALUATING OXYGEN ISOTOPE RATIOS AS PROXIES FOR PALEOCLIMATE RECONSTRUCTIONS

EKART, Douglas D., Salt Lake City, UT 84106

15-6

SOUTHWEST CLIMATE AND ECOSYSTEM PRODUCTIVITY IN THE MIOCENE

BUI, Thu, Geosciences, Colorado State University, Campus Delivery 1482, Fort Collins, CO 80523, SPAUR, Siânin, New Mexico Bureau of Geology & Mineral Resources, New Mexico Tech, Socorro, NM 87801; Department of Geosciences, Colorado State University, Fort Colins, CO 80521, RUGENSTEIN, Jeremy, Department of Geosciences, Colorado State University, Fort Collins, CO 80521 and KONING, Daniel, NM Bureau of Geology and Mineral Resources/New Mexico Tech, 801 Leroy Place, New Mexico Tech, Socorro, NM 87801

15-7

THE RISE OF C₄ GRASSES IN SOUTH AMERICA: LINKING GRASSLAND TRANSITION TO THE SOUTH AMERICAN SUMMER MONSOON

COTTON, Jennifer¹, GHOSH, Adit², HYLAND, Ethan G.³, HAUSWIRTH, Scott¹, LITTLETON, Shelby⁴, AZMI, Iffat⁵, INSEL, Nadja⁶, RAIGEMBORN, Maria Sol⁷ and TINEO, David⁷, (1)Geological Sciences, California State University, Northridge, 18111 Nordhoff St, Northridge, CA 91330, (2)Department of Earth Sciences, University of Southern California, Los Angeles, CA 90089, (3)Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University, Raleigh, NC 27695, (4)Geological Sciences, California State University, Northridge, Northridge, CA 91330, (5)Dept. of Marine, Earth & Atmospheric Sciences, North Carolina State University, 2800 Faucette Dr., Raleigh, NC 27695, (6)Earth Science, Northeastern Illinois University, Chicago, IL 60625, (7)Centro de Investigaciones Geológicas and Facultad de Ciencias Naturales y Museo, CONICET and Universidad Nacional de La Plata, La Plata, C1925, Argentina

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Rocky Mountain Section - 73rd Annual Meeting - 2023

T10. Past and Present Stable Isotopes of the Western U.S. and Beyond (Posters)