Many historians have thought that U.S. Navy funding of oceanography paved the way for plate tectonic theory. By funding extensive investigations of the deep ocean, Navy support enabled scientists to discover and understand sea-floor magnetic stripes, the association of the deep trenches with deep-focus earthquakes, and other key features.

Historian of science and geologist Naomi Oreskes presents a different view: the major pieces of plate tectonic theory were in place in the 1930s, and military secrecy in fact prevented the coalescence of plate tectonics, delaying it for three decades.

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