Keigwin, Lloyd; Keller, Gerta (1984): Middle Oligocene cooling from Equatorial Pacific DSDP Site 77B. Geological Society of America (GSA), Boulder, CO, United States, Geology (Boulder), 12 (1), 16-19, georefid:1984-009902

Stable-isotope and quantitative planktonic foraminiferal studies. Lower abundance of inferred warm-water species and enrichment of (super 18) O and (super 12) C in foraminiferal tests during the interval 29 to 32 m.y. ago suggest cooler climate, lowered sea level, and significant volume of continental ice compared to earlier and later times in the Oligocene.--Modified journal abstract.
West: -133.1342 East: -133.1342 North: .2854 South: .2854
Expedition: 9
Site: 9-77
Supplemental Information:
Woods Hole Oceanogr. Inst.; Contrib. No. 5395
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Provider: SEDIS Publication Catalogue
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