Neogene Benthic Foraminifera of the Hatton-Rockall Basin
- 1 January 1986
- journal article
- research article
- Published by JSTOR in Micropaleontology
- Vol. 32 (4), 324-356
- https://doi.org/10.2307/1485726
Abstract
A quantitative analysis is presented of benthic foraminifera from 25 samples of the Miocene and Pliocene section of DSDP Site 116 (eastern margin of the Hatton-Rockall Basin in the northeast Atlantic). Taxonomic turnover was gradual; however, abundance changes (dominance) were dramatic. During the early Middle Miocene, a major abundance change occurred to an assemblage dominated by modern taxa. This change can be associated with major stable isotopic changes documented at this time, and suggests a benthic foraminiferal response to a major reorganization of oceanic circulation. The causes of subsequent assemblage dominance fluctuations are more ambiguous; an increase in the Uvigerina fauna in the Early Pliocene may be associated with more negative .delta.13C values and a decreased contrast in .delta.13C between the Atlantic and Pacific, the latter possibly indicative of reduced circulation in this part of the Atlantic.This publication has 14 references indexed in Scilit:
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