The surface below sedimentary rocks that overlie igneous or metamorphic rocks is termed a(n)
A) disconformity.
B) angular unconformity.
C) nonconformity.
D) marker bed.

Question

Quizplus · Accepted Answer

When sedimentary rocks overlie igneous or metamorphic rocks, the surface between the two is termed a nonconformity. A disconformity occurs between two layers of sedimentary rocks, while an angular unconformity occurs between tilted or folded layers of rock. A marker bed can be used for correlation purposes but does not refer specifically to the boundary between two types of rock layers.

The Surface Below Sedimentary Rocks That Overlie Igneous or Metamorphic