The Appalachian Mountains are a result of plate tectonics.

The formation of the Appalachians involved the collision and movement of tectonic plates, specifically the North American and African plates, during the formation of the supercontinent Pangea around 300 million years ago. This collision led to the uplift and folding of the Earth's crust, creating the mountain range. While erosion and other geological processes have played significant roles in shaping the Appalachians over millions of years, the initial formation is primarily attributed to tectonic activity. This complex history contributes to the diverse geology and landscapes found throughout the Appalachian region today.