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. https://doi.org/10.1144/gsjgs.155.5.0737

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Abstract/Summary

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.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1144/gsjgs.155.5.0737
Programmes:	BAS Programmes > Pre 2000 programme
ISSN:	0016-7649
Additional Keywords:	Antarctica, Pliocene, palaeoclimatology, 40Ar–39Ar, diatoms
Date made live:	03 Dec 2013 14:43 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/504103

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