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History of the Map

January 01, 1945

The Glacial Map of North America embodies the first attempt at representing the Pleistocene glacial features of North America in considerable detail and on a large scale. The earlier maps, though useful for their times, were, with one exception, published on a small scale. That exception (T. C. Chamberlin’s excellent 1913 wall map, scale 1 inch = 104 miles) did not attempt to differentiate the several drift sheets nor to plot the directions of glacier flow other than in a very generalized manner. Among the small-scale maps, the compilations of Antevs, published in 1929, are noteworthy for the amount of drift-border detail they show, although they did not represent the whole of North America on a single map.

The following is a list of published glacial maps of North America. Those which appear in textbooks of geology, those which show only a part of North America, and those which show glaciers in restored form, instead of glacial-geologic features, are not included.

Lewis, H. C. (1894) Glacial geology of Great Britain and Ireland, Longmans, Green & Co., London, plate opp. p. 4. 9 × 8½ inches. Scale: 1 inch = 630 miles. Colored.

Dana, J. D. (1895) Manual of geology, 4th ed., American Book Co., New York, Fig. 1548. 8½ × 6 inches. Scale: 1 inch = about 500 miles;

Upham, Warren (1895) The Glacial Lake Agassiz, U. S. Geol. Survey, Mon. 25, pi. 16. 9½ × 6½ inches. Scale: 1 inch = about 550 miles. Colored.

Leverett, Frank (1899) The Illinois . . .

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GSA Special Papers

Glacial Map of North America; Part 2 Bibliography and Explanatory Notes

Richard Foster Flint
Richard Foster Flint
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January 01, 1945




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