Part 2/11:
The key differentiator lies in their age and geological activity. The Appalachian Mountains are significantly older than the Rockies, with the latter still being shaped by tectonic processes that are active. In contrast, the Appalachians have existed in a relatively tectonically stable environment for millions of years. This article will delve into the formation of the Appalachian Mountains, their geological history, and the types of rocks that characterize this ancient range.