Uppermost ___________ rocks document an episode of widespread extinction and expansion of glaciers near the south pole that we know was related to that extinction.
A) Cambrian
B) Ordovician
C) Silurian
D) Devonian
Correct Answer:
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Q1: Select the characteristic below that is NOT
Q3: One of the problems with trying to
Q4: A(n) _ includes all strata in the
Q5: Select the method below that is NOT
Q6: _ form the basis for all magnetic
Q7: The boundary between two chronostratigraphic units, for
Q8: A time-rock unit is the same thing
Q9: If after three half-lives, a mineral crystal
Q10: Correlation of local stratigraphic sections measured along
Q11: In 1879, _ proposed that a system
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