A group of eras are called a(n)
A) eon.
B) period.
C) millennia.
D) epoch.
Correct Answer:
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Q6: Sedimentary layer A lies above sedimentary layer
Q7: Fossils that are useful in correlating rock
Q8: Fossilized tree resin is known as
A) coal.
B)
Q9: Tracks, borings, and burrows are examples of
A)
Q10: The process of matching up rock layers
Q12: The oldest evidence of life on Earth
Q13: Another name for cyanobacteria, the earliest evidence
Q14: The largest units of geologic time are
Q15: Breaks, or gaps, in the rock record
Q16: The oldest evidence of life on Earth
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