Rick had a rock (Rock A) from 1000 feet beneath the crust's surface. He later dug 3000 feet deeper and got a second rock (Rock B). Which rock is likely younger?
Rock A Rock B
A B
Older rocks are at the bottom and younger rocks are at the top.
at the bottom
older
bottom
MORE
MORE
older rocks
3000 feet deeper
1000 feet beneath the crust's surface
rock
rock
rock
rock