Why Have Many Precambrian Rocks Remained Unchanged for Billions of Years

question 15

Multiple Choice

Why have many Precambrian rocks remained unchanged for billions of years?

• A) They are so old that they haven't had time to move past the first stage.
• B) They are protected within the interiors of the continents.
• C) They are only found in Antarctica and thus are not exposed to erosion.
• D) They are metamorphic rocks that are too hard to be transformed.

---

Definitions:

Rectal Medications

Medications administered through the rectum, often used for their rapid absorption or for local effects.

Rectal Area

The final section of the large intestine, terminating at the anus.

Dorsal Surface

The back or upper side of an organism or body part, opposite of the ventral or front side.

Prone Position

A body position where one lies flat with the chest down and the back up.