East Coast earthquake: How does a 5.9 temblor happen in Virginia?- Christian Science Monitor

.Crustal collisions 300 million years ago formed the Appalachian Mountains, which would have grown as tall as today’s Himalayas, explains Steven Jaumé, a geophysicist at the College of Charleston in South Carolina. Then, 200 million years ago, the continents began to split, forming the Atlantic Ocean.


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