fossil evidence, matching rock types and geologic structures, and evidence of ancient climate patterns. But Wegener could not come up with an acceptable way to explain how the continents moved.

It emphasizes the evidence supporting plate tectonics ... Keywords plate tectonics, continental drift, geological change, earthquakes, volcanic activity, Mid-Atlantic Ridge, Iceland, San Andreas ...

This discovery, together with data from a 1964 research vessel, transformed the field of geology. It confirmed sea-floor spreading as hypothesized by Hess, and thus "continental drift," originally ...