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

question 70

Multiple Choice

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.

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Definitions:

Coxal Bone

Another term for the hip bone, comprising the ilium, ischium, and pubis, that forms part of the pelvis.

Pelvic Girdle

The ring of bones in the lower torso, comprised of the two hip bones, sacrum, and coccyx, providing support for the human body's weight.

Axial Skeleton

The axial skeleton is the part of the skeleton that consists of the bones of the head and trunk of a vertebrate, including the skull, spine, sternum, and ribs.

Cancellous Bone

a type of bone that is less dense, more porous, and found at the ends of long bones and in the inner layers of most bones, important for metabolic processes.