Why isn't the Precambrian more finely divided into sub-divisions like periods and epochs?
A)Fewer and less diverse fossils exist in Precambrian rocks.
B)Precambrian rocks don't have radioactive isotopes in them.
C)Geologists just don't care about the Precambrian the way they do about more recent time periods.
D)The Precambrian lacks the igneous rocks that are most useful for radiometric dating.

Question

Quizplus · Accepted Answer

The lack of abundant and diverse fossils in Precambrian rocks makes it difficult to create precise subdivisions based on the appearance and disappearance of specific species.

Why Isn't the Precambrian More Finely Divided into Sub-Divisions Like