Rocks containing many of the earliest examples of evolving life are found in the ________ of North America because they were formed in shallow ________ seas.
A)center;active margin
B)center;epierogenic
C)edges;passive margin
D)edges;epicontinental

Question

Quizplus · Accepted Answer

Rocks containing early examples of evolving life were formed in shallow seas, which suggests a passive margin. The edges of North America are more likely to have formed passive margins, whereas active margins would be associated with the center. "Epicontinental" specifically refers to shallow seas covering parts of continental shelves, which is the most appropriate term to describe the environment where these rocks were formed.

Rocks Containing Many of the Earliest Examples of Evolving Life