A hiatus between igneous or metamorphic rocks and sedimentary rocks is represented in the rock record by a(n)____.
A)angular unconformity
B)hiatal unconformity
C)nonconformity
D)anticonformity
E)disconformity

Question

Quizplus · Accepted Answer

A nonconformity is a type of unconformity where there is a gap in the rock record between layers of igneous or metamorphic rocks and sedimentary rocks which have been deposited on top of them. This gap is typically caused by erosion of the older rocks before the deposition of the sedimentary rocks.

A Hiatus Between Igneous or Metamorphic Rocks and Sedimentary Rocks