Marie Tharp, who died in 2006, has never been more in the public eye. This short film for the Royal Institution, animated by Rosanna Wan and narrated by Helen Czerski, is the fourth profile I’ve seen of her within the past year. [National Geographic]
Another profile of ocean cartographer Marie Tharp, this time from Smithsonian.com’s Erin Blakemore. As Blakemore recounts, Tharp crunched and mapped the sonar sounding data collected by her collaborator, Bruce Heezen; her calculations revealed a huge valley in the middle of a ridge in the North Atlantic seafloor.
“When I showed what I found to Bruce,” she recalled, “he groaned and said ‘It cannot be. It looks too much like continental drift.’ … Bruce initially dismissed my interpretation of the profiles as ‘girl talk’.” It took almost a year for Heezen to believe her, despite a growing amount of evidence and her meticulous checking and re-checking of her work. He only changed his mind when evidence of earthquakes beneath the rift valley she had found was discovered—and when it became clear that the rift extended up and down the entire Atlantic. Today, it is considered Earth’s largest physical feature.
When Heezen—who published the work and took credit for it—announced his findings in 1956, it was no less than a seismic event in geology. But Tharp, like many other women scientists of her day, was shunted to the background.
The Smithsonian’s Ocean Blog has a profile of ocean cartographer Marie Tharp, whose discovery of the Mid-Atlantic Ridge’s rift valley provided hard evidence for the theory of plate tectonics.
A review in Maclean’s brought to my attention a book that came out two months ago: Hali Felt’s Soundings, a biography of Marie Tharp (1920-2006), who with her partner, Bruce Heezen, created the first global map of the ocean floor, discovered the Mid-Atlantic Ridge’s rift valley, and helped provide the evidence for plate tectonics. She’s a major figure in cartography and among women in science, so I thought I should bring this book to your attention, too. Another one to add to the to-read pile.