Benthic foraminiferal biofacies, sediments and water masses of the southern Peru- Chile Trench area, southeastern Pacific Ocean.

J. C. Ingle, G. Keller, R. L. Kolpack

Research output: Contribution to journalArticle

103 Scopus citations

Abstract

Lowest species diversities and specimen abundance correlate with a shallow O2 minimum zone at 150-400m where dissolved O2 values are less than 1 ml/l. The most dramatic faunal change across the entire shelf-edge-to-abyssal gradient occurs at the base of this low O2 parcel between 400 and 500m, where 35 species have their shallowest or deepest occurrences. Low diversity and abundances also characterize a deep O2-minimum zone at 900-1700m. Alternately, highest species diversities and abundances are found at depths shallower than 150m and at 400-900m correlating with surface and intermediate oxygen maxima and associated salinity minima. A sharp increase in the relative abundance and diversity of agglutinated species at c3500m correlates with the CaCO3 lysocline. -from Authors

Original languageEnglish (US)
Pages (from-to)113-150
Number of pages38
JournalMicropaleontology
Volume26
Issue number2
DOIs
StatePublished - 1980
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Palaeontology

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