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

被引：28

作者：

Jonkers, HA

Kelley, SP

机构：

[1] British Antarctic Survey, NERC, Cambridge CB3 0ET, England

[2] Open Univ, Dept Earth Sci, Milton Keynes MK7 6AA, Bucks, England

来源：

JOURNAL OF THE GEOLOGICAL SOCIETY | 1998年 / 155卷

关键词：

Antarctica; Pliocene; palaeoclimatology; 40Ar-39Ar; diatoms;

D O I：

10.1144/gsjgs.155.5.0737

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

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.

引用

页码：737 / 740

页数：4

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