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今日はマリー・サープを称えての日。

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Today’s Doodle celebrates the life of Marie Tharp, an American geologist and oceanographic 1cartographer who helped prove the2 theories of continental drift. She co-published the first world map of the ocean floors. On this day in 1998, the Library of Congress named Tharp one of the greatest cartographers of the 20th century.

Today’s Doodle features an interactive exploration of Tharp’s life. Her story is narrated by Caitlyn Larsen, Rebecca Nesel, and Dr. Tiara Moore , three notable women who are currently living out Tharp’s legacy by making strides in the traditionally male-dominated ocean science and geology spaces.

1　地図製作者
2　大陸移動説

Marie Tharp was an only child born on July 30, 1920, in Ypsilanti, Michigan. Tharp’s father, who worked for the U.S. Department of Agriculture, gave her an early introduction to mapmaking. She attended the University of Michigan for her master’s degree in 3petroleum geology−this was particularly impressive given so few women worked in science during this period. She moved to New York City in 1948 and became the first woman to work at the Lamont Geological Observatory where she met geologist Bruce Heezen.

Heezen gathered ocean-depth data in the Atlantic Ocean, which Tharp used to create maps of the mysterious ocean floor. New findings from echo sounders (sonars used to find water depth) helped her discover 4the Mid-Atlantic Ridge. She brought these findings to Heezen, who infamously dismissed this as “girl talk”.

3　石油地質学
4 大西洋中央海嶺

However, when they compared these V-shaped rifts with earthquake 5epicenter maps, Heezen could not ignore the facts. Plate tectonics and continental drift were no longer just theories−the seafloor was undoubtedly spreading. In 1957, Tharp and Heezen co-published the first map of the ocean floor in the North Atlantic. Twenty years later, National Geographic published the first world map of the entire ocean floor penned by Tharp and Heezen, titled “The World Ocean Floor.”

Tharp donated her entire map collection to the Library of Congress in 1995. On the 100th anniversary celebration of its Geography and Map Division, the Library of Congress named her one of the most important cartographers in the 20th century. In 2001, the same observatory where she started her career awarded her with its first annual Lamont-Doherty Heritage Award.

Click on today’s Doodle to begin your journey through Tharp’s extraordinary life and scientific contributions!

5　震央

1998年11月21日、米国議会図書館は彼女を20世紀の偉大な地図製作者の一人として認定。
彼女は海底の地形の研究が知られている。