The oldest well-documented stromatolites occur in the ____

A)Hadean
B)Archean
C)Paleoproterozoic
D)Mesoproterozoic
E)Neoproterozoic


B

Environmental & Atmospheric Sciences

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Since Canada closed the Grand Banks in 1992, fish populations have rebounded to historical levels

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Which process produces relatively pure deposits of gravel, sand, and clay?

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Environmental & Atmospheric Sciences