it cool
yes
by comparing its placement with that of fossils in other layers of rock
relative dating
An index fossil.
The answer is the fossil record :D
yes
It is determined because in layers of rocks the fossils are found so the layers of rocks give information to the scientist about the age of a fossil so like that the relative age of a fossil is determined.
by comparing its placement with that of fossils in other layers of rock
C). a narrow time range and a wide geographic range
relative dating
No. It is not uncommon for the layers to be shifted out of a horizontal position.
Relative dating is how scientists determine how old a species is by looking at the undisturbed layers of rock. The deeper down the layer is the older the fossil is. (:
An index fossil.
This is called an index fossil.
The answer is the fossil record :D
That the clams were formed before the trees. The lower layers are older as they are set down first.
The crust and the lithosphere.