Which of the following was not formed from a continental-continental collision?

A.

The Tetons

B.

The Appalachians

C.

The Alps

D.

The Himalayas

The appropriate answer is a. The Tetons. Continental to continental plate collision occurs when continental crust comes together and compression and folding and faulting over time leads to the formation of extensive fold mountain ranges. The Appalachians, The Alps and the Himalayas were all formed at continental collision plate margins.