The presence of grabens and horsts indicates the occurrence of
A) volcanic activity.
B) rift activity.
C) collision activity.
D) strike-slip activity.

Question

Quizplus · Accepted Answer

Grabens and horsts are formed by the process of rifting, which is the pulling apart of the Earth's crust. As the crust stretches, it can create blocks of land that drop down (grabens) and blocks that rise up (horsts). This process is associated with the formation of divergent plate boundaries, where tectonic plates move away from each other. Volcanic activity is often associated with divergent plate boundaries, but the presence of grabens and horsts alone does not necessarily indicate volcanic activity. Collision activity and strike-slip activity are associated with different types of plate tectonic boundaries and would not typically result in the formation of grabens and horsts.

The Presence of Grabens and Horsts Indicates the Occurrence of