Paleocene-Eocene Thermal Maximum (~55 Million years ago ) Planktonic Foram Assemblages Kelly, D.C. Kelly, D.C. earth science/paleoclimate/paleoceanography (identified foraminifer,null,null,percent,null,paleoceanography,null,null,N,Morozovella sp.) earth science/paleoclimate/paleoceanography (identified foraminifer,null,null,percent,null,paleoceanography,null,null,N,Acarinina coalingensis) earth science/paleoclimate/paleoceanography (identified foraminifer,null,null,percent,null,paleoceanography,null,null,N,Acarinina wilcoxensis) earth science/paleoclimate/paleoceanography (identified foraminifer,null,null,percent,null,paleoceanography,null,null,N,Subbotina sp.) earth science/paleoclimate/paleoceanography (identified foraminifer,null,null,percent,null,paleoceanography,null,null,N,Acarinina praepentacamerata) earth science/paleoclimate/paleoceanography (identified foraminifer,null,null,percent,null,paleoceanography,null,null,N,Acarinina subsphaerica) earth science/paleoclimate/paleoceanography (identified foraminifer,null,null,percent,null,paleoceanography,null,null,N,Acarinina sp. robust form) earth science/paleoclimate/paleoceanography (identified foraminifer,null,null,percent,null,paleoceanography,null,null,N,Chiloguembelina trinitatensis >180 microns) earth science/paleoclimate/paleoceanography (identified foraminifer,null,null,percent,null,paleoceanography,null,null,N,Acarinina nitida) earth science/paleoclimate/paleoceanography (identified foraminifer,null,null,percent,null,paleoceanography,null,null,N,Globocassidulina obtusa) earth science/paleoclimate/paleoceanography (identified foraminifer,null,null,percent,null,paleoceanography,null,null,N,Acarinina mckannai) earth science/paleoclimate/paleoceanography (identified foraminifer,null,null,percent,null,paleoceanography,null,null,N,Acarinina soldadoensis) earth science/paleoclimate/paleoceanography (identified foraminifer,null,null,percent,null,paleoceanography,null,null,N,Subbotina patagonica) earth science/paleoclimate/paleoceanography (depth,null,null,centimeter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (identified foraminifer,null,null,percent,null,paleoceanography,null,null,N,Parasubbotina varianta) earth science/paleoclimate/paleoceanography (notes,null,null,null,null,paleoceanography,null,null,N,Number of specimans) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (ODP 690B>LATITUDE -65.16>LONGITUDE 1.2) High-resolution study of Antarctic planktonic foraminiferal assemblages (Ocean Drilling Program Site 690, Weddell Sea) shows that these microplankton underwent a stepwise series of changes during the Paleocene-Eocene thermal maximum (PETM). Initiation of this response coincides with the onset of the carbon isotope excursion (CIE) but precedes the benthic foraminiferal mass extinction. The ""top-to-bottom"" succession in the biotic response indicates that the surface ocean/atmosphere was affected before the deep sea. The earliest stage of the faunal response entailed a conspicuous turnover within the shallow-dwelling genus Acarinina and a succession of stratigraphic first appearances. The genus Morozovella, large (>180 ĩm) biserial planktonics, and A. wilcoxensis are all restricted to the lower CIE within this PETM section. Acarininid populations crashed as the ocean/climate system ameliorated during the CIE recovery, reflecting atypical surface water conditions. This transient decline in acarininids is paralleled by a marked increase in carbonate content of sediments. It is postulated that this interval of carbonate enrichment, and its unusual microfauna, reflects enhanced carbon storage within reservoirs of the global carbon cycle other than the marine carbonate system [sensu Broecker et al., 1993 ; Ravizza et al., 2001 ]. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Kelly, D.C. 2002-07-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/2631 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/kelly2002 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp690b-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/kelly2002 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp690b-tab.txt English https://www.ncdc.noaa.gov/paleo/study/2631 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/kelly2002 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp690b-tab.txt Kelly, D.C. 2002. Response of Antarctic (ODP Site 690) planktonic foraminifera to the Paleocene-Eocene thermal maximum: Faunal evidence for ocean/climate change. Paleoceanography 17(4), 1071. 1.2 -65.16 1.2 -65.16