Where are the Appalachian mountains?

By |2019-01-29T05:37:18-08:00June 25th, 2017|Geology, North America|

The Appalachian Mountains When did the Appalachian Mountains form? About 300 million years ago, near the end of the Carboniferous period, when the first reptiles were evolving, the tectonic plates began to form the supercontinent of Pangaea. More about plate tectonics The Carboniferous period All our geology articles How high were the Appalachians [...]