A surface of erosion on metamorphic or igneous rocks below sedimentary rocks is a(n):
A) nonconformity.
B) disconformity.
C) angular unconformity.
D) anticonformity.
E) none of the above

Question

Quizplus · Accepted Answer

A nonconformity occurs where sedimentary rocks are deposited on top of eroded metamorphic or igneous rocks, indicating a significant gap in the geological record.

A Surface of Erosion on Metamorphic or Igneous Rocks Below