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11 votes
During World War II Harry Hess discovered

A. earthquakes
B. trenches
C. volcanoes
D. igneous rocks
on the seafloor; evidence of seafloor spreading.

User Nilinswap
by
7.8k points

1 Answer

5 votes
D. Igneous rocks
He discovered “flat top mountains” on the Pacific Floor.
User Priya Singhal
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