Why Have Many Precambrian Rocks Remained Unchanged for Billions of Years

question 12

Multiple Choice

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

• A)They are so old that they have not 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.