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

question 2

Multiple Choice

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.

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Definitions:

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