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Articles on Marine geology

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Tharp with an undersea map at her desk. Rolled sonar profiles of the ocean floor are on the shelf behind her. Lamont-Doherty Earth Observatory and the estate of Marie Tharp

Marie Tharp pioneered mapping the bottom of the ocean 6 decades ago – scientists are still learning about Earth’s last frontier

Born on July 30, 1920, geologist and cartographer Tharp changed scientific thinking about what lay at the bottom of the ocean – not a featureless flat, but rugged and varied terrain.
The submersible Alvin about 8,500 feet down, studying seafloor volcanoes and eruptions. (c) Woods Hole Oceanographic Institution with thanks to Daniel Fornari – WHOI-MISO Facility (www.whoi.edu/miso) and National Science Foundation

Scientist at work: I’m a geologist who’s dived dozens of times to explore submarine volcanoes

When you study volcanoes at mid-ocean ridges, doing fieldwork means becoming an aquanaut – diving thousands of feet to the ocean floor in the submersible Alvin, trading tight quarters for amazing views.

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