disconformity

noun, plural dis·con·form·i·ties.

1. Geology. the surface of a division between parallel rock strata, indicating interruption of sedimentation: a type of unconformity.
2. Archaic. nonconformity.

noun plural -ties

1. lack of conformity; discrepancy
2. the junction between two parallel series of stratified rocks, representing a considerable period of erosion of the much older underlying rocks before the more recent ones were deposited

1. A type of unconformity in which the successive strata are parallel.