seafloor spreading Archives - State of the Planet

Marie Tharp

Marie Tharp’s Adventures in Mapping the Seafloor, In Her Own Words

The pioneering mapmaker explains how she and colleagues discovered underwater mountain ranges 40,000 miles long, and helped to prove that the continents move.

by |July 24, 2020

Walter Pitman and the Smoking Gun of Plate Tectonics

“We had this magic key, this magic magnetic profile,” Pitman said. “We were able to date it and eventually use it not only as a tool that proved continental drift but a tool by which we could actually reconstruct the pattern of drift, that is the relative position of the continents, and the actual timing of the separation of the continents.”

by |April 20, 2016