Marine fossils are easily identified, geographically extensive, and existed over a short interval of geologic time.
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Q8: The principles of superposition, original horizontality, and
Q9: Unconformities represent a gap in time.
Q10: A catastrophic flood might produce a disconformity.
Q11: If dike A cuts across sill B,
Q12: Correlation is the process of matching similar
Q14: Well cuttings enable geologists to correlate rock
Q15: In two half-lives, 25 percent of the
Q16: Accurate radiometric dates are possible from any
Q17: Radiometric dates are most accurate from igneous
Q18: Radiometric dates from closed systems are more
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