The Glaciation of the Shetland Isles

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IN the Geological Magazine for May and June, 1870, my colleague, Dr. Croll, first pointed out that the Scotch and Scandinavian ice-sheets probably united on the floor of the North Sea, and thence moved northwards towards the Atlantic. He was led to this conclusion by a consideration of the peculiar direction of the striæ in Caithness, in Shetland, and the Faroe Isles, as well as by the occurrence of marine shells in the boulder clay of the northern parts of Caithness. He showed that the enormous mer de glace which pressed out on all sides from Scandinavia forced its way close to the Scotch coastline, and in virtue of its greater size produced a slight deflection of the Scotch ice, causing it to over-ride portions of the main land. He stated that in all likelihood both the Shetland and the Faroe Isles were over-topped by the Scandinavian ice in its onward march towards the Atlantic.

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HORNE, J. The Glaciation of the Shetland Isles . Nature 15, 139 (1876) doi:10.1038/015139b0

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