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Posted on April 16, 2022 (Updated on July 9, 2025)

What did Harry Hess discover that helped Wegener prove the continental drift theory?

Regional Specifics

Alfred Wegener produced evidence in 1912 that the continents are in motion, but because he could not explain what forces could move them, geologists rejected his ideas. Almost 50 years later Harry Hess confirmed Wegener’s ideas by using the evidence of seafloor spreading to explain what moved continents.

What did Harry Hess find as evidence of continental drift?

It was Hess who determined how oceanic mountain ranges, called mid-ocean ridges, are fundamental to the tectonic movement that results in the drift of continents.

What was Harry Hess’s theory?

Hess reasoned that the sediment has been accumulating for about 300 million years at most. This interval is approximately the time needed for the ocean floor to move from the ridge crest to the trenches, where oceanic crust descends into the trench and is destroyed.

What did Alfred Wegener discover?

Lived 1880 – 1930.



Alfred Wegener proposed the theory of continental drift – the idea that Earth’s continents move. Despite publishing a large body of compelling fossil and rock evidence for his theory between 1912 and 1929, it was rejected by most other scientists.

Who helped prove Alfred Wegener’s theory?

Alfred Wegener produced evidence in 1912 that the continents are in motion, but because he could not explain what forces could move them, geologists rejected his ideas. Almost 50 years later Harry Hess confirmed Wegener’s ideas by using the evidence of seafloor spreading to explain what moved continents.

How did Wegener discover continental drift?

The theory of continental drift is most associated with the scientist Alfred Wegener. In the early 20th century, Wegener published a paper explaining his theory that the continental landmasses were “drifting” across the Earth, sometimes plowing through oceans and into each other.

How did Alfred Wegener discover the continental drift theory?

In 1912 Alfred Wegener (1880-1930) noticed the same thing and proposed that the continents were once compressed into a single protocontinent which he called Pangaea (meaning “all lands”), and over time they have drifted apart into their current distribution.

Who is Harry Hess What is the best known for?

Harry Hammond Hess (May 24, 1906 – August 25, 1969) was an American geologist and a United States Navy officer in World War II who is considered one of the “founding fathers” of the unifying theory of plate tectonics.

Why was Harry Hess important?

Hess’ most significant contribution to the plate tectonic theory began in 1945 when he was the commander of the U.S.S. Cape Johnson. While traveling from one destination to another, Hess would leave the sounding equipment on that would take measurements of the sea floor.

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