Middle Oligocene cooling from equatorial Pacific, DSDP Site 77B ( pelagic sediment).

L. Keigwin, G. Keller

Research output: Contribution to journalArticle

48 Scopus citations

Abstract

An apparently complete 150m Oligocene sequence of pelagic sediment at equatorial Pacific DSDP Site 77B has been analyzed for stable-isotope and quantitative planktonic foraminiferal studies. Lower abundance of inferred warm-water species and enrichment of 18 O and 12 C in foraminiferal tests during the interval 29 to 32 my ago suggest cooler climate, lowered sea level, and significant volume of continental ice compared to earlier and later times in the Oligocene.-Authors

Original languageEnglish (US)
Pages (from-to)16-19
Number of pages4
JournalGeology
Volume12
Issue number1
DOIs
StatePublished - Jan 1 1984
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Geology

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