Benthic foraminifera and phytodetritus species in sediments from DSDP Leg 85, and ODP Legs 113 and 143, supplement to: Thomas, Ellen; Gooday, Andrew J (1996): Cenozoic deep-sea benthic foraminifers: Tracers for changes in oceanic productivity? Geology, 24(4), 355-358

Ellen Thomas & Andrew J Gooday
From late middle Eocene through earliest Oligocene, high-latitude regions cooled, and by the end of the period, continental ice sheets existed in Antarctica. Diversity of planktonic microorganisms declined, and modern groups of terrestrial vertebrates originated. Coeval faunal changes in deep-sea benthic foraminifers have been related to cooling of deep waters and increased oxygenation. Cooling, however, occurred globally, whereas species richness declined at high latitudes and not in the tropics. The late Eocene and younger lower-diversity,...
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