A(n) _________ is a contact in which an erosional surface on a pluton or metamorphic rock has been covered by sedimentary (or volcanic) rock.

Question

Quizplus · Accepted Answer

A nonconformity is a type of contact where sedimentary or volcanic rock overlies an erosional surface on a pluton or metamorphic rock. The erosional surface forms due to uplift and erosion of older rocks, and the subsequent deposition of younger sediments or volcanic rocks on top creates a nonconformity.

A(n) _________ Is a Contact in Which an Erosional Surface