Answer:
In the grand canyon, fossils in rock layers at the bottom of the canyon are older than those in layers closer to the top.
Step-by-step explanation:
The Grand canyon was formed over 6 million years ago by the Colorado river and cut a deep channel through the rock. Sediment over time builds up on river banks and similar areas. Anything to have died near that would have been covered and then left to decompose and mineralize under ground .
(Sorry if this wasn’t helpful, this was just my version)