Which eon of geologic time is represented by rocks containing abundant shelly fossils?
A) Hadean
B) Archean
C) Phanerozoic
D) Proterozoic

Question

Quizplus · Accepted Answer

The Phanerozoic eon is characterized by the abundance of shelly fossils, which indicates the diversification and evolution of life on Earth during this time period. The Hadean, Archean, and Proterozoic eons represent earlier periods in Earth's history when life had not yet evolved or was still in its early stages of development.

Which Eon of Geologic Time Is Represented by Rocks Containing