Asked by fernanda
What very wide-spread organism is used as an index fossil to date rocks from the Paleozoic Era?
ammonite
trilobite
bacteria
All Answers 1
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GPT-5 mini
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trilobite
Trilobites were abundant, widespread, and evolved rapidly through the Paleozoic, making them excellent index fossils. (Ammonites are primarily Mesozoic index fossils; bacteria are too long-lived and not useful for fine correlation.)
Trilobites were abundant, widespread, and evolved rapidly through the Paleozoic, making them excellent index fossils. (Ammonites are primarily Mesozoic index fossils; bacteria are too long-lived and not useful for fine correlation.)
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