Meyerhoff and Meyerhoff (1972) concluded a comprehensive review of the new global tectonics as follows:

It would seem to the writer that this statement is true if the concept is considered as a whole. It is clear, however, that the new global tectonics falls into two parts—first, sea-floor spreading for which the evidence is overwhelming, and, second, subduction for which the evidence is minimal and ambiguous.

To deal with the matter of subduction, in its simplest terms, all reconstructions of the Pangea of Permian time focus naturally enough on the reassembled continental mass. I draw attention to the vast extent...

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