What main criterion determines major divisions in the geologic time scale?
A. shifts in the position of Earth in its orbit
B. the occurrence of huge events in Earth's natural history
C. different stages in human evolution
D. times of major climate change
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Home » Chemistry » What main criterion determines major divisions in the geologic time scale? A. shifts in the position of Earth in its orbit B. the occurrence of huge events in Earth's natural history C. different stages in human evolution D.