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Social Studies, 22.01.2021 18:10 gothicleonardogal

When did the tectonic history of the Appalachian Mountains begin? A. 800-700 M. Y.B. P.
B. 500-400 M. Y.B. P.
C. 400-300 M. Y.B. P.
D. 300-260 M. Y.B. P.

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When did the tectonic history of the Appalachian Mountains begin? A. 800-700 M. Y.B. P.
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