The first time period for which abundant fossils have been found is the
A)Precambrian.
B)Silurian.
C)Pliocene.
D)Cambrian.

Question

Quizplus · Accepted Answer

Abundant fossil evidence has been found from the Cambrian period, which lasted from approximately 541 million years ago to 485 million years ago. This period is known for the sudden appearance of complex organisms with hard shells, such as trilobites and brachiopods. Prior to the Cambrian period, there is some fossil evidence, but it is sparse and primarily consists of single-celled organisms.

The First Time Period for Which Abundant Fossils Have Been