Question

which statement explains one reason why unconformities occur? rocks along a fault break and move. igneous rock forms at earths surface. no sediment is deposited over a long time.

Explanation:

Unconformities are gaps in the geologic record. They occur when there is a long - term lack of sediment deposition, leading to a break in the sequence of rock layers. Faulting and igneous rock formation are not the main reasons for unconformities.

Answer:

No sediment is deposited over a long time.