Which observation suggests that the continental crust did not form by the same processes that presently occur on Earth?
A) The crust is largely andesitic.
B) The time frame is too slow.
C) There is more water now so the processes must be different chemically.
D) Magnetic records in the rocks show that the gravity was different.

Question

Quizplus · Accepted Answer

The crust being largely andesitic suggests a different process of formation than what we observe today, where basaltic and granitic compositions are more common. This indicates that the processes forming the continental crust in the past were different from current geological processes.

Which Observation Suggests That the Continental Crust Did Not Form