Multiple Choice
What is the K-T boundary?
A) a layer of dark sediment in the geological record formed at the same time humans learned to use fire
B) a boundary between rocks containing the oldest life and older rocks that contained no life
C) a boundary between the Earth's crust and the molten rock beneath it
D) a layer of dark sediment in the geological record separating the Cretaceous and Tertiary periods of Earth's history
Correct Answer:
Verified
Correct Answer:
Verified
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