Presents data on whole-rock ages of shales occuring between and below Pre-Cambrian tillites at Varangerfjord, n. Norway. These indicate deposition of tillite c. 668+ or -23 m.y., and thus dates the Varanger Ice Age. This date corresponds with dated Pre-Cambrian glaciation in the Congo and Australia. The Tanafjord Group, or Old Sandstone, beneath the tillites, dated 810+ or -90 m.y., correlates with the Upper Torridonian of Scotland.

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