Arctic Paleo-Oceanography in Late Cenozoic Time

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Science  31 Jul 1970:
Vol. 169, Issue 3944, pp. 474-477
DOI: 10.1126/science.169.3944.474


Sediment cores from the Arctic Ocean yield significant faunal and lithologic evidence of alternating cold and milder periods for the last 6 million years. Although high-latitude continental glaciation commenced prior to 6 million years ago, the Arctic Ocean remained free of permanent pack ice up to approximately 0.7 million years ago, after which successive ice-covered and ice-free conditions existed.

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