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Marie Tharp pioneered mapping the bottom of the ocean 6 decades ago – scientists are still learning about Earth’s last frontierThese views made it easier to visualize the ocean floor’s topography and create a physiographic map. Tharp’s careful plotting ...
This expedition was the first use of closely spaced echo sounders to map deep sea topography and the first to reveal the extent of the sea floor's rugged ... runs through the Atlantic to the ...
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