Figure 4.3 Marie Tharp and geologist Bruce Heezen study the final version of Heinrich Berann's World Ocean Floor Panorama in Beranns studio, Austria, 1977. Berann was engaged by the U.S. Navy and the National Geographic Society to incorporate Tharp's work and data from other sources in a unified form. One of Berann's beautiful maps is induded as Figure 4.22. Lamont-Doherty Earth Obsenatoryof Colu mbia GREENLAND HuSON BAY NORTH AMERICA DUBCIN MADERA CARACAS AMAON AFRICA SOUTH AMERICA Figure 4.22 Heinrich Berann's hand-drawn map of a portion of the Atlantic Ocean floor showing some major oceanic features: mid-ocean ridge, transform faults, fracture zones, submarine canyons, seamounts, continen- tal rises, trenches, and abyssal plains. If the ocean evaporated, the ridge system would be Earths most remark- able and obvious feature. Depths are in feet. The map is vertically exaggerated. A CAN ATERAS AA AABYSAL P ALCOA Al uminum Company

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