3. what assumptions are necessary to determine the relative ages of all the rock layers, given that no one…

3. what assumptions are necessary to determine the relative ages of all the rock layers, given that no one location contains all of the index fossils?

3. what assumptions are necessary to determine the relative ages of all the rock layers, given that no one location contains all of the index fossils?

Answer

Brief Explanations:

To determine relative rock - layer ages without all index fossils in one location, we assume that index fossils have a known, limited time range of existence. Also, we assume the principle of superposition (younger layers are on top of older ones in undisturbed sequences), and that rock layers in different locations can be correlated based on similar rock types and fossil assemblages.

Answer:

Assumptions include known time - ranges of index fossils, the principle of superposition, and correlation of rock layers based on rock types and fossil assemblages.