EVIDENCE FOR IMPACTS: CRATERS (2)

Objects with “old” surfaces (no modifications due to volcanism, plate tectonics, etc.) show many craters, indicating that cratering was common during the late stages of the solar system’s formation.
“Younger” surfaces also have some craters, but far fewer.

Objects with “old” surfaces (no modifications due to volcanism, plate tectonics, etc.) show many craters, indicating that cratering was common during the late stages of the solar system’s formation.