Miocene Benthic Stable Isotope Data Andersson, C.; Jansen, E. Andersson, C. Jansen, E. earth science/paleoclimate/paleoceanography (delta 18O,Cibicidoides wuellerstorfi,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 13C,Cibicidoides wuellerstorfi,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (age,null,null,radiocarbon year before present,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (depth,null,null,centimeter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (ODP 982>LATITUDE 57.517>LONGITUDE -15.8665) Oxygen and carbon isotope records are presented for the benthic foraminifer Cibicidoides wuellerstorfi from upper middle through lower upper Miocene (11.6-8.2 Ma) sediments recovered at intermediate water depth (1134 m) at Ocean Drilling Program Site 982 on Rockall Plateau. Oxygen isotopic values generally lighter than those for the Holocene indicate significantly warmer intermediate waters and/or less global ice volume during the late middle to early late Miocene than at the present. The most depleted oxygen isotope values occurred at around 10.5 Ma. After this time a long-term increase in d18O suggests a gradual increase in global ice volume and/or cooling of intermediate waters during the late Miocene. Comparison of the intermediate depth benthic foraminiferal carbon isotope record from Site 982 and records from various North Atlantic deep sites shows that intermediate waters were generally better ventilated than deep waters between 11.6 and 9.6 Ma. During this time period, increased ventilation of intermediate waters was linked to cooling or the build up of polar ice caps. The Mi events originally proposed by Miller et al. [1991b] and Wright and Miller [1992] are difficult to identify with certainty in sediments sampled at high resolution (<10^4year). Comparison of the high-resolution benthic d18O records from ODP Site 982 with the low-resolution benthic d18O record from Monte Gibliscemi (Mediterranean) show that Mi events, if real, may not be of importance as a stratigraphic tool in upper Miocene sedimentary sequences. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Andersson, C. Investigator : Jansen, E. 2003-07-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/2579 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/andersson2003 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp982an-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/andersson2003 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp982an-tab.txt English https://www.ncdc.noaa.gov/paleo/study/2579 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/andersson2003 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp982an-tab.txt Andersson, C., and E. Jansen. 2003. A Miocene (8-12 Ma) intermediate water benthic stable isotope record from the northeastern Atlantic, ODP Site 982. Paleoceanography 18(1):1013. START YEAR: 11586000 14C yr BP * END YEAR: 8193000 14C yr BP -15.8665 57.517 -15.8665 57.517