Continental drift

1912

Continental drift

The book of science

Tom Sharp

Alfred Lothar Wegener geophysics

Continental drift

Pangaea

My drift

Alfred Wegener thought that continents drifted because of centrifugal forces; today the picture is more complicated, involving convection in the upper mantle, the motions of the seafloors spreading from the mid-ocean ridges and their densities varying with age, gravitational forces, tidal forces, and centrifugal forces. Scientists have differing theories.

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