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Tertiary marine paleotemperatures

S. M. Savin, R. G. Douglas and F. G. Stehli
Tertiary marine paleotemperatures
Geological Society of America Bulletin (November 1975) 86 (11): 1499-1510


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. This study reports the results of an oxygen isotope paleotemperature study of Upper Cretaceous and Tertiary foraminiferal tests from the deep sea and derives from them general curves for high- and low-latitude marine thermal history. In middle Miocene time high-latitude temperatures dropped dramatically, perhaps corresponding to the onset of major glaciation in Antarctica, but low-latitude temperatures remained constant or perhaps increased. This uncoupling of high- and low-latitude temperatures is postulated to be related to the establishment of a circum-Antarctic circulation similar to that of today. A further drop in high-latitude temperatures in late Pliocene time probably signaled the onset of a major increase in polar glaciation, including extensive sea-ice formation.

ISSN: 0016-7606
EISSN: 1943-2674
Serial Title: Geological Society of America Bulletin
Serial Volume: 86
Serial Issue: 11
Title: Tertiary marine paleotemperatures
Affiliation: Case West. Reserve Univ., Dep. Earth Sci., Cleveland, Ohio, United States
Pages: 1499-1510
Published: 197511
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
Accession Number: 1976-003893
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Annotation: Planktonic and benthonic foraminifera, oxygen isotopes, DSDP sites, Pacific Ocean and South Atlantic
Illustration Description: illus. incl. tables, sketch map
S60°00'00" - N75°00'00", W80°00'00" - E20°00'00"
Source Note: Case West. Reserve Univ., Dep. Earth Sci. Contrib. No. 101
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data from the Antarctic Bibliography, United States
Update Code: 1976
Program Name: DSDPDeep Sea Drilling Project
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