Washington, D.C. National Geographic Society, 1971.
Map. Full-color offset lithograph. 25" x 19". Some wear along original folds.
Supplement to the October 1971 issue of National Geographic Magazine, Vol. 140, No. 4. One side features a relief map of the Arctic Ocean floor, showing Alaska, Siberia, Scandinavia, and Greenland. Geological features above and below the ocean are labeled, with heights and depths indicated. Cities, rivers, and islands are also labeled. The other side depicts same geographical area, centered on the Arctic Circle, colored to show political boundaries of land masses, and the sea ice that makes up much of the Arctic. Historical data is written throughout the map, showing the routes of various expeditions and surveys, as well as existing radar and meteorological stations. Cities, towns, rivers, and lakes are labeled. Forested areas are depicted pictorially. Ocean and seas include depths, currents, sea ice limits, and wind patterns.
Marie Tharp (1920-2006) was a prominent American oceanographic cartographer and geologist, whose work was incredibly important to modern earth science and to the advancement of women in the field. The discovery of the Mid-Atlantic Ridge and our modern understanding of plate tectonics and continental drift has been attributed to Tharp - although at the time she was often uncredited for her work.