If horizontal sedimentary strata overlie tilted strata (and no fault is present),the surface between the horizontal and tilted strata must be a(n)____________.
A) conformable sedimentary contact
B) angular unconformity
C) disconformity
D) nonconformity

Question

If horizontal sedimentary strata overlie tilted strata (and no fault is present),the surface between the horizontal and tilted strata must be a(n)____________. 
A) conformable sedimentary contact 
B) angular unconformity 
C) disconformity 
D) nonconformity

Quizplus · Accepted Answer

If horizontal sedimentary strata overlies tilted (or folded) strata, it indicates that there was a time gap or interruption in deposition. This means that the older tilted strata was uplifted, eroded, and then the younger horizontal strata was deposited on top. This boundary between the two sets of strata is called an unconformity. If the boundary is tilted or folded, it is called an angular unconformity.

If Horizontal Sedimentary Strata Overlie Tilted Strata (And No Fault