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Questions tagged [plate-tectonics]

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3 votes
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When was the term "plate tectonics" first used in geology?

The Merriam-Webster online dictionary writes that the first known usage of plate tectonics in the sense of the geological theory was in 1969. Encyclopedia Britannica credits Alfred Wegener with an ...
Colin Pace's user avatar
8 votes
1 answer
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How and when was it realized that ophiolites represented pieces of ocean crust?

Ophiolites are distinctive sequences of rock, typically capped by sediments followed by basic rocks (pillow lavas, sheeted dykes, and gabbro) followed by ultramafics (eg. dunite). Although the exact ...
winwaed's user avatar
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21 votes
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Why was the continental drift theory of Alfred Wegener so controversial in the first part of the 20th century?

I frequently hear and read that Wegener's theory was very controversial at the time it was suggested. Why was this so? Was it due to Wegener himself, to evidence that was erroneously interpreted at ...
Peabody's user avatar
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