the diagram represents the rock layers and fossils found in four separate rock outcrops. which fossil is the…

the diagram represents the rock layers and fossils found in four separate rock outcrops. which fossil is the best index fossil? it is found in all four layers in one outcrop. it is found in only one of the four outcrops. it is found in one layer in all four outcrops. it is found in both the oldest and youngest layers.

the diagram represents the rock layers and fossils found in four separate rock outcrops. which fossil is the best index fossil? it is found in all four layers in one outcrop. it is found in only one of the four outcrops. it is found in one layer in all four outcrops. it is found in both the oldest and youngest layers.

Answer

Brief Explanations:

Index fossils are fossils that are used to date the rock layers in which they are found. The best index fossils are found in a wide - spread area and in a single rock layer. The fossil found in one layer in all four outcrops meets this criterion as it can be used to correlate the rock layers across different locations.

Answer:

The fossil that is found in one layer in all four outcrops.