An unconformity in which tectonic activity tilted older sedimentary rock layers before younger sediment accumulated is:
A) an angular unconformity.
B) a disconformity.
C) conformable.
D) a nonconformity.

Question

Quizplus · Accepted Answer

An angular unconformity is defined as an unconformity in which older, tilted rock layers are overlain by younger, undeformed rock layers. This type of unconformity is commonly caused by tectonic activity that tilts or folds the older rocks before younger sediments are deposited on top of them.

An Unconformity in Which Tectonic Activity Tilted Older Sedimentary Rock