Isotopic composition of foraminifera from sediments of DSDP Legs 3, 6-9, 17 ...

• Main Authors: Savin, Samuel M, Douglas, Robert G, Stehli, Francis G
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1975
• Subjects: Drilling/drill rig; Piston corer; Leg3; Leg6; Leg7; Leg8; Leg9; Leg17; ELT21; ELT24; Glomar Challenger; Eltanin; Deep Sea Drilling Project DSDP; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.720968; https://doi.pangaea.de/10.1594/PANGAEA.720968

Oxygen isotopic compositions of the tests of planktonic foraminifera from several Deep Sea Drilling Project sites provide a general picture of low-latitude marine temperatures from Maastrichtian time to the present. Bottom temperatures determined from the isotopic compositions of benthonic foraminifera are interpreted as being indicative of high-latitude surface temperatures. Prior to the beginning of middle Miocene time, high- and low-latitude temperatures changed in parallel fashion. Following an apparently small and short-lived drop in temperature near the Tertiary-Cretaceous boundary, temperatures remained warm and relatively constant through Paleocene and early and middle Eocene time; bottom temperatures then were on the order of 12°C. A sharp temperature drop in late Eocene time was followed by a more gradual lowering of temperature, culminating in a late Oligocene high-latitude temperature minimum of about 4°C. A temperature rise through early Miocene time was followed in middle Miocene time by a ... : Supplement to: Savin, Samuel M; Douglas, Robert G; Stehli, Francis G (1975): Tertiary marine paleotemperatures. Geological Society of America Bulletin, 86(11), 1499-1510 ...