How Tectonic Movements Shaped American History

How Tectonic Movements Shaped American History
Larry Rippel/Allegheny Conference on Community Development via A

The story of the Appalachians began almost half a billion years ago. The first British colonialists arrived in North America just 400 years ago. Yet both events are connected and shaped the history of the modern United States. Without a series of mountain building cycles 65 to 490 million years ago caused by the assembling and breakup of the supercontinent Pangaea, it's possible that today we would see the United States of Canada having a border to the south with the Spanish-American Empire.

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