GSA Annual Meeting in Phoenix, Arizona, USA - 2019

Paper No. 38-14
Presentation Time: 9:00 AM-5:30 PM


WIDGA, Chris, Don Sundquist Center of Excellence in Paleontology, East Tennessee State University, 1212 Suncrest Dr, Gray, TN 37615, WALKER, J. Douglas, Department of Geology, The University of Kansas, 1414 Naismith Blvd, Ritchie Hall, Lawrence, KS 66045, WANAMAKER Jr., Alan D., Department of Geological and Atmospheric Sciences, Iowa State University, 253 Science I, Ames, IA 50011, ASHER, Brendon, Blackwater Draw Museum, Eastern New Mexico University, Portales, NM 88130 and HOLEN, Steven, Center for American Paleolithic Research, 1120 S. Summit View Dr, Fort Collins, CO 80524

The remains of extinct Ice Age animals along the north shoreline of Lovewell Reservoir in Jewell Co., KS have been professionally investigated for over 40 years. Taxa from this locality include: Camelops sp., Equus sp., Proboscidea, Smilodon fatalis, and Holmesina septentrionalis. Serial enamel samples were collected for stable isotope analyses from a S. fatalis canine reflecting ~20 months of growth. Stable carbon isotope values (δ13C) range from -4.7‰ to -6.6‰ (PDB) while oxygen isotope values (δ18Owater) range from -8.2‰ to -2.8‰ (VSMOW). Although undated, δ18O values from this animal have a similar seasonal range as modern surface water in the region, and exhibit even more elevated warm-season δ18O values. This is consistent with an age that is either interglacial or a warmer part of the last glacial period. More negative δ13C values could represent a more wooded landscape as would have been present during interglacials, or it could reflect more cool-season grasses as expected during the cooler Wisconsin glacial. Finally, 87Sr/86Sr of S. fatalis tooth enamel was compared to a regional Sr isoscape. Overall, these values indicate an annual range limited to central and eastern Kansas and Nebraska.