In the stratigraphic sequence of the Grand Canyon,depicted below,the contact between the Muav Limestone and the overlying Redwall Limestone spans two missing periods of geologic time.The contact between these two stratigraphic units represents a(n)
A)disconformity.
B)nonconformity.
C)angular unconformity.
D)a conformable depositional contact.

Question

In the stratigraphic sequence of the Grand Canyon,depicted below,the contact between the Muav Limestone and the overlying Redwall Limestone spans two missing periods of geologic time.The contact between these two stratigraphic units represents a(n) 
A)disconformity. 
B)nonconformity. 
C)angular unconformity. 
D)a conformable depositional contact.

Quizplus · Accepted Answer

The contact between the Muav Limestone and the overlying Redwall Limestone represents a disconformity, which is a type of unconformity characterized by a gap in the stratigraphic record where there was erosion or non-deposition of sedimentary rock.

In the Stratigraphic Sequence of the Grand Canyon,depicted Below,the Contact