Which is the first step that geological must do to compare rock layers at distant locations. A. Find the absolute age of rocks at both locations

B. Compare a layers at one location to layers at other locations

C. Identify index fossils in one or more layers at one locations

D. Collect fossil from different locations to study the organisms lifestyles

B. Compare a layers at one location to layers at other locations.

Explanation:

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the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

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oxygen +1 most likely