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Desmatosuchus was a crocodile relative that lived only during the Triassic Period. Horsetails are plants that first appeared in the Triassic Period and still exist. Which of these organisms would be more useful as an index fossil for the Triassic Period? Why?

if you just answer this to get the points you're gonna be reported

User Shahina
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im lost is there a answer key so i can explain it to you?
User Donna
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