vwebster vwebster

11-11-2019
Geography

contestada

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

Respuesta :

ibematrix ibematrix

11-11-2019

Answer:

the appearance and disappearance of group of organisms

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