A reassessment of the age of the Cockburn Island Formation, northern Antarctic Peninsula, and its palaeoclimatic implications

Jonkers, H. A.; Kelley, S. P.

NORA

A reassessment of the age of the Cockburn Island Formation, northern Antarctic Peninsula, and its palaeoclimatic implications

Jonkers, H. A.; Kelley, S. P.. 1998 A reassessment of the age of the Cockburn Island Formation, northern Antarctic Peninsula, and its palaeoclimatic implications. Journal of the Geological Society, 155 (5). 737-740. 10.1144/gsjgs.155.5.0737

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Abstract

New constraints on the age of the Cockburn Island Formation, northern Antarctic Peninsula, resulting from whole rock laser-stepped heated 40Ar–39Ar dating of associated basalt and palaeomagnetic re-calibration of the ranges of the formation’s fossil diatom taxa, suggest that interglacial conditions existed around 3 million years ago. The refined age of the deposit supports continent-wide Late Pliocene warming in Antarctica, and makes more likely the occurrence of extensive marine incursions in East Antarctica at that time.

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Programmes:

A Pre-2012 Programme

Official URL:

http://dx.doi.org/10.1144/gsjgs.155.5.0737

Digital Object Identifier (DOI):

10.1144/gsjgs.155.5.0737

Programmes (Superseded):

BAS Programmes > Pre 2000 programme

ISSN: