Precambrian refers to all the time before the start of the __________ Eon.
A) Hadean
B) Archean
C) Proterozoic
D) Phanerozoic
Correct Answer:
Verified
Q23: To be useful, an index fossil is
Q24: Relative age measurement refers to:
A) age measured
Q25: In a disconformity:
A) the sedimentary layers above
Q26: Imagine that you found two sandstone beds
Q27: A magmatic intrusion cutting through sedimentary layers:
A)
Q29: The half-life of potassium-40 is 1.3 billion
Q30: Geologic evidence for the cause of the
Q31: In a _, the sedimentary layers above
Q32: Scientists have noted that mass extinctions have
Q33: Fish, amphibians, and reptiles all evolved during
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