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Detailed explanation-1: -Google is paying tribute to American geologist and oceanographic cartographer, Marie Tharp, who helped prove the theories of continental drift. She co-published the first world map of ocean floors. On November 21 in 1998, the Library of Congress named Ms. Tharp one of the greatest cartographers of the 20th century.

Detailed explanation-2: -Marie Tharp was an American geologist and oceanographer (a scientist who studies the oceans). She helped create an important map of the ocean floor. The map led Tharp to realize that the ocean floor could help prove the scientific theory of continental drift, or the idea that the continents are moving.

Detailed explanation-3: -Marie Tharp is credited with producing one of the world’s first comprehensive maps of the ocean floor. She and research partner Bruce Heezen transformed a once barren and flat landscape into a dynamic three-dimensional space with mountains, valleys and trenches.

Detailed explanation-4: -Her revolutionary work revealed the detailed topography and multi-dimensional geographic landscape of the ocean bottom and revealed the presence of a continuous rift valley along the axis of the Mid-Atlantic Ridge, a shift in thinking that led to the acceptance of the theories of plate tectonics and continental drift.