andrewsfogleman andrewsfogleman

22-01-2021
Social Studies

contestada

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.

Respuesta :

mbaney2022 mbaney2022

22-01-2021

Answer:

480 million years ago

The Appalachians first formed roughly 480 million years ago during the Ordovician Period, and once reached elevations similar to those of the Alps and the Rocky Mountains before they were eroded.

Explanation:

so b is your answer

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