description Harry Hess Overview
Harry Hammond Hess (1906–1969) was an American geologist and a professor at Princeton University. He served as an officer in the United States Navy during World War II, during which he used naval sonar data to study the ocean floor. In 1960, Hess proposed the theory of seafloor spreading, suggesting that new oceanic crust forms at mid-ocean ridges and spreads outward. This hypothesis provided a critical mechanism for the theory of plate tectonics that was later confirmed through independent paleomagnetic research.
insights Ranking position
Harry Hess ranks #4 of 379 in the Geologist ranking, behind Victor Moritz Goldschmidt, ahead of James Dwight Dana.
help Harry Hess FAQ
What major geological theory did Harry Hess formulate?
Hess formulated the theory of seafloor spreading in 1960. This theory proposed that new oceanic crust is formed at mid-ocean ridges and spreads outwards, providing the crucial mechanism for continental drift.
Was Harry Hess also involved in World War II?
Yes, he served as an officer in the United States Navy during World War II. He commanded the assault transport USS Cape Johnson and used the ship's sonar to secretly map the ocean floor.
Did Harry Hess win any awards for his geological work?
He was awarded the prestigious Penrose Medal by the Geological Society of America in 1966. His research fundamentally laid the groundwork for the modern theory of plate tectonics.
How did Harry Hess discover guyots (flat-topped mountains)?
While commanding his naval ship in the Pacific, Hess mapped numerous flat-topped underwater mountains, which he named "guyots." He deduced that these were ancient volcanic islands that had their peaks eroded by waves before sinking.
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