A geologist finds identical index fossils in a rock layer in the Grand Canyon in Arizona and in a rock layer in northern Utah, more than 675 kilometers away. What inference can she make about the 2 rock layers? (1 point)

Question

A geologist finds identical index fossils in a rock layer in the Grand Canyon in Arizona and in a rock layer in northern Utah, more than 675 kilometers away. What inference can she make about the 2 rock layers? (1 point)

She can make no inference.
The rock layer in the Grand Canyon is older.
A two rock layers are about the same age.
The rock layer in northern Utah is older.

Answer 1

The correct answer is: The two rock layers are about the same age.

Answer 2

A geologist finds identical index fossils in a rock layer in the Grand Canyon in Arizona and in a rock layer in northern Utah, more than 675 kilometers away. What inference can she make about the 2 rock layers? (1 point)

The correct answer is: The two rock layers are about the same age.

The correct inference that the geologist can make about the two rock layers is that they are about the same age.