Elk Lake, Minnesota 12,000 Year Ostracod Abundance and Geochemical Data Smith, A.J.; Donovan, J.J.; Ito, E.; Engstrom, D.R. Smith, A.J. Donovan, J.J. Ito, E. Engstrom, D.R. earth science/paleoclimate/paleolimnology (calcium carbonate,sediment,null,weight percent,null,paleolimnology,null,loss on ignition,N,null) earth science/paleoclimate/paleolimnology (mineral matter,sediment,null,weight percent,null,paleolimnology,null,loss on ignition,N,non-combustible inorganics) earth science/paleoclimate/paleolimnology (depth,null,null,centimeter,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (organic matter,sediment,null,weight percent,null,paleolimnology,null,loss on ignition,N,null) earth science/paleoclimate/paleolimnology (sample identification,null,null,null,null,paleolimnology,null,null,C,null) earth science/paleoclimate/paleolimnology (delta 13C,ostracod,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,Candona rawsoni) earth science/paleoclimate/paleolimnology (magnesium/calcium,ostracod,null,millimole per mole,null,paleolimnology,null,inductively-coupled plasma mass spectrometry,N,Candona rawsoni) earth science/paleoclimate/paleolimnology (strontium/calcium,ostracod,null,millimole per mole,null,paleolimnology,null,inductively-coupled plasma mass spectrometry,N,Candona rawsoni) earth science/paleoclimate/paleolimnology (identified ostracod,sediment,null,count per gram,null,paleolimnology,null,null,N,Cytherissa lacustris) earth science/paleoclimate/paleolimnology (identified ostracod,sediment,null,count per gram,null,paleolimnology,null,null,N,Limnocythere staplini) earth science/paleoclimate/paleolimnology (delta 18O,ostracod,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,Candona rawsoni) earth science/paleoclimate/paleolimnology (identified ostracod,sediment,null,count per gram,null,paleolimnology,null,null,N,Candona rawsoni) earth science/paleoclimate/paleolimnology (identified ostracod,sediment,null,count per gram,null,paleolimnology,null,null,N,Candona ohioensis) earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology (Elk Lake>LATITUDE 45.86694>LONGITUDE -95.80361) Lake response to climate forcing is commonly regarded as being controlled by within-lake processes. We present a case from the northern Great Plains in which Holocene drought response recorded in lake sediments was determined by changes in chemical characteristics of source ground water. Middle Holocene ostracode assemblages were dominated by halophylic Limnocythere staplini, indicating increased lake-water salinity, yet the oxygen isotope values in this period decreased by 2‰ to 3‰, contrary to expectations of evaporative dominance. We infer from these proxy records and ground-water flow-model results that the paleoclimatic record in the lake was mediated by changes in ground-water catchment area and by reduction in evapotranspiration accompanying desiccation of peripheral lake basins. STUDY NOTES: Elk Lake ostracod abundance and geochemical data for mid-Holocene groundwater modeling and drought reconstruction. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Smith, A.J. Investigator : Donovan, J.J. Investigator : Ito, E. Investigator : Engstrom, D.R. 2000-01-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/6064 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greatplains/elklake/smith/ostracod_data.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greatplains/elklake/smith/elklake_smith1997.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greatplains/elklake/smith/geochem_data.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greatplains/elklake/smith/14c_data.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greatplains/elklake/smith/readme_smith1997.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greatplains/elklake/smith/ostracod_data.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greatplains/elklake/smith/elklake_smith1997.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greatplains/elklake/smith/geochem_data.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greatplains/elklake/smith/14c_data.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greatplains/elklake/smith/readme_smith1997.txt English https://www.ncdc.noaa.gov/paleo/study/6064 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greatplains/elklake/smith/ostracod_data.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greatplains/elklake/smith/elklake_smith1997.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greatplains/elklake/smith/geochem_data.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greatplains/elklake/smith/14c_data.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greatplains/elklake/smith/readme_smith1997.txt A.J. Smith, J.J. Donovan, E. Ito, and D.R. Engstrom, 1997, Ground-water processes controlling a prairie lake's response to middle Holocene drought. Geology, 25, 391-394. START YEAR: cal yr BP * END YEAR: cal yr BP -95.80361 45.86694 -95.80361 45.86694