Following this final episode of Appalachian mountain building,
the supercontinent of Pangaea broke apart, and
the North American and African tectonic plates gradually moved to
their present position. The new rugged highlands, the ancient
ancestors of the Smokies, were subjected to intense erosion from
ice, wind, and water. As mountain valleys were carved,
tremendous quantities of eroded sediment were transported toward
the Atlantic Ocean and Gulf of Mexico by rivers and streams.
Some of these sediments formed our Gulf of Mexico Beaches.
La marintnine INATO wrn down the layers of rock most
The
What is the central idea?