Compare and contrast the Late Paleozoic mobile belts of North America. How did tectonic
conditions influence these mobile belts? What will be an ideal response?
The Appalachian mobile belt along the east coast of North America formed largely as the result
of the collision of North America and Africa during the formation of Pangaea. However, some
orogenic activity occurred before this collision and was largely the result of tectonic processes
associated with an active convergent plate boundary. The Ouachita mobile belt, located in the
southern part of North America, is thought to be continuous with the Appalachian mobile belt
and also began as an active convergent plate boundary. Orogenic activity was enhanced when
Gondwana collided with Laurasia during the formation of Pangaea. The Cordilleran mobile belt
is located along the west coast of North America and originally formed by collision of an island
arc with what would become continental North America. Most features of the Cordilleran mobile
belt were formed by subduction-related processes accompanied by accretion of various terranes.
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