Match the following. Match the items in the left column to the items in the right column. common gray to black volcanic
1. basaltic
rock, usually fine-grained due to rapid
cooling of lava
the process in which huge numbers
of species die out suddenly
process by which the earth's crust
2. glaciation
3. mass extinction
is pulled apart and new crust forms
the advance and retreat of large
4. rifting
masses of slow-moving ice