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In order for an organism to be used as an index fossil, the organism must have been geographically widespread and must have
fossils found in each rock unit
Alaska once had a tropical marine environment
a series of alternating layers of shale and sandstone
limestone
Cambrian shale
index fossils
deposit quickly over a wide area
existed for a geologically short time
Which kind of bedrock would most likely contain fossils?
fossils found in each rock unit
Alaska once had a tropical marine environment
a series of alternating layers of shale and sandstone
limestone
Cambrian shale
index fossils
deposit quickly over a wide area
existed for a geologically short time
Sedimentary rock units several hundred kilometers apart could best be correlated by comparing the
fossils found in each rock unit
Alaska once had a tropical marine environment
a series of alternating layers of shale and sandstone
limestone
Cambrian shale
index fossils
deposit quickly over a wide area
existed for a geologically short time
Layers of volcanic ash often serve as useful geologic time markers because ash layers usually
fossils found in each rock unit
Alaska once had a tropical marine environment
a series of alternating layers of shale and sandstone
limestone
Cambrian shale
index fossils
deposit quickly over a wide area
existed for a geologically short time
Which rock type most often contains fossils?
fossils found in each rock unit
Alaska once had a tropical marine environment
a series of alternating layers of shale and sandstone
limestone
Cambrian shale
index fossils
deposit quickly over a wide area
existed for a geologically short time
Which bedrock feature is most useful in correlating sedimentary bedrock in one area with sedimentary bedrock in another area?
fossils found in each rock unit
Alaska once had a tropical marine environment
a series of alternating layers of shale and sandstone
limestone
Cambrian shale
index fossils
deposit quickly over a wide area
existed for a geologically short time
Which bedrock would be most likely to contain fossils?
fossils found in each rock unit
Alaska once had a tropical marine environment
a series of alternating layers of shale and sandstone
limestone
Cambrian shale
index fossils
deposit quickly over a wide area
existed for a geologically short time
Living corals are found in warm, shallow seas. Coral fossils have been found in the sedimentary rocks of Alaska. These findings suggest that
fossils found in each rock unit
Alaska once had a tropical marine environment
a series of alternating layers of shale and sandstone
limestone
Cambrian shale
index fossils
deposit quickly over a wide area
existed for a geologically short time
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