Continental drift: an idea before its time Alfred Wegener First proposed hypothesis, 1915 Published The Origin of Continents and Oceans Continental.
From Hypothesis to Theory. In the 19th and early 20th centuries, several scientists suggested that the continental masses had been slowly but steadily.
Plate Tectonics. In This Chapter: Composition of the Earth Layers of the Earth: crust, outer core, inner core, mantle Continental Drift Theory Evidence:
