Assume that you have just examined several flat-lying sedimentary layers.After much study you determine that there is a considerable span of time for which no sedimentary rock layer exists at this site.You have just discovered a(n)________.
A)angular unconformity
B)series of conformable strata
C)disconformity
D)example of cross-cutting relationships

Question

Quizplus · Accepted Answer

A considerable span of time for which no sedimentary rock layer exists at a site is indicative of a disconformity, which is a type of unconformity where there is missing rock record between parallel sedimentary layers. Angular unconformities involve non-parallel sedimentary layers and cross-cutting relationships involve the intrusion of one rock body into another. Series of conformable strata indicate the presence of layers that have been continuously deposited without interruption.

Assume That You Have Just Examined Several Flat-Lying Sedimentary Layers