"The lower, older rock layer deposited before a mass extinction event contains a noticeably different diversity of fossilized life. It usually has far greater diversity than that found in rock layers deposited after the extinction event."
Using the "Interactive Review Section" of your eBook answer the following question:
Complete the paragraph to describe how analysis of rock layers can be used as evidence of extinction.
"The lower,
[ Select ]
rock layer deposited before a mass extinction event contains a noticeably different diversity of fossilized life. It usually has far
[ Select ]
diversity than that found in rock layers deposited after the extinction event."
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