  ISRAEL C. RUSSELL PROFESSOR OF GEOLOGY IN THE UNIVERSITY OF LIST OF ILLUSTRATIONS COLOURED MAPS NORTH AMERICA CHAPTER I THE MARGIN OF THE CONTINENT THE CONTINENTAL SHELF Fig. 1. Fig. 1.—North America. From a photograph of a relief map by Victor and Cosmos Mindeleff. Scales of original: Horizontal, 120 miles to 1 inch; vertical, 40,000 feet to 1 inch: proportion, 1:16. NORTH AMERICA |
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