Which of the following events separate geologic time into eras and periods? the creation of new ocean ridges the appearance and disappearance of volcanoes the appearance and disappearance of groups of

Which of the following events separate geologic time into eras and periods?

the creation of new ocean ridges
the appearance and disappearance of volcanoes
the appearance and disappearance of groups of organisms
the number of earthquakes occurring at that time

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Which of the following events separate geologic time into eras and periods? the creation of new ocean ridges the appearance and disappearance of volcanoes the appearance and dis…

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