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Marie Tharp by McPitu
Marie Tharp (July 30, 1920 – August 23, 2006) was an American geologist and oceanographic cartographer who, in partnership with Bruce Heezen, created the first scientific map of the Atlantic Ocean floor. Tharp's work revealed the detailed topography and multi-dimensional geographical landscape of the ocean bottom. Her work also revealed the presence of a continuous rift valley along the axis of the Mid-Atlantic Ridge, causing a paradigm shift in earth science that led to acceptance of the theories of plate tectonics and continental drift
 
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