Investigation of Quaternary foraminifera in sediment core CRP-1 from the Ross Sea, Antarctica

Foraminifera are examined in twenty-six samples from a 44 metre succession of Quaternary glacial sediments recovered from the CRP-1 drillhole on Roberts Ridge, southwestern Ross Sea, Antarctica. In situ marine assemblages were documented in at least three of the six lithostratigraphic units, and it...

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Bibliographic Details
Main Authors: Webb, Peter-Noel, Strong, C Percy
Format: Dataset
Language:English
Published: PANGAEA 1998
Subjects:
16 km ENE Cape Roberts
Cape Roberts Project
Core wireline system
CRP
CRP-1
CWS
off Cape Roberts
Ross Sea
Antarctica
Sampling/drilling ice
Cape Roberts
Roberts Cape
Roberts Ridge
Antarc*
Neogloboquadrina pachyderma
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.510745
https://doi.org/10.1594/PANGAEA.510745
Description
Summary:Foraminifera are examined in twenty-six samples from a 44 metre succession of Quaternary glacial sediments recovered from the CRP-1 drillhole on Roberts Ridge, southwestern Ross Sea, Antarctica. In situ marine assemblages were documented in at least three of the six lithostratigraphic units, and it is likely that the remaining three interbedded diamicton units are also marine in origin. Peak foraminiferal diversities are documented in Unit 3.1 (73 species) and Unit 2.2 (32 species). Calcareous benthics dominate the assemblages, but may be accompanied by abundant occurrences of the planktonic Neogloboquadrina pachyderma. Low diversity agglutinated faunas appear in the uppermost strata of Units 4.1 and 2.2. A close relationship between lithofacics and foraminiferal biofacies points to marine environments that alternated between proximity to and distance from active glaciers and iceshelf fronts, with associated variations in salinity, sea-surface ice cover and the levels of rainout from debris-laden ice.

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