Cenozoic 66-0
Geologic Time Scale
Time Period Duration (Millions of Years ago)
Cenozoic 66-0
Mesozoic 252-66
Paleozoic 541-252
Trilobites appeared approximately 521 years ago and disappeared approximately 250 million years ago. During which era did the trilobites live?
a
Cenozoic
b
Mesozoic
c
Paleozoic
d
None of These
Answers: 2
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Geologic Time Scale
Time Period Duration (Millions of Years ago)
Cenozoic 66-0
Cenozoic 66-0
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