Correlation of Rock Layers

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Living corals are found in warm, shallow seas. Coral fossils have been found in the sedimentary rocks of Alaska. These findings suggest that

Which kind of bedrock would most likely contain fossils?

Which rock type most often contains fossils?

Which bedrock would be most likely to contain fossils?

Which processes most often cause fossil evidence to be preserved in rock?

Layers of volcanic ash often serve as useful geologic time markers because ash layers usually

Which bedrock feature is most useful in correlating sedimentary bedrock in one area with sedimentary bedrock in another area?

In order for an organism to be used as an index fossil, the organism must have been geographically widespread and must have