Question

The mass extinction that was most likely caused by the formation and retreat of glaciers was the _____ extinction.

Cretaceous-Tertiary
End Triassic
Permian-Triassic
Late Devonian
Ordovician-Silurian

Answer 1

Question: The mass extinction that was most likely caused by the formation and retreat of glaciers was the _____?

Answer: Ordovician-Silurian

Answer 2

The answer is Ordovician-Silurian.

The mass extinction thaw was most likely caused by the extinction that was most likely caused by the formation and retreat of glacier was the Ordovician-Silurian extinction. It is the second largest among the five major extinction events.