Truthing Gap

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Marie Tharp

At coffee break someone mentions Marie Tharp describing her as an ‘artist who drew sections of the seabed’. Further research uncovers a cartographer and geologist, working in the fifties - a time when women were not allowed onto research vessels, who with a pen, ruler and data collected by her colleague, oceanographer Bruce Heezen, plotted the Mid-Oceanic Ridge, a line of undersea mountains that run along the sea bed between Europe/Africa and the Americas. An undertaking that laid the foundations for theories of plate tectonics and continental drift which were controversial until well into the 1960’s.

‘She wondered whether the depression was evidence of a continuous rift - a crack in the world - down the middle of the ridge. And … in turn whether that rift might be evidence of what scientists now call seafloor spreading, popularly known as continental drift. She and Mr. Heezen argued about it. She threw erasers and bottles of ink at him. It took him some time to come around. “I discounted it as girl talk and didn’t believe it for a year”

Many of the tributes to Tharp, who died in 2006, emphasize her fiery nature and powerful intuition observations which charecterise her achievements in a way that it is hard to imagine happening to a man, the later offering never the less a point of reference for my own less than rational approach.