What process uses rock layers and index fossils to determine an object's estimated age?

relative dating

Explanation:

Relative dating is the science of determining the relative order of past events (i.e., the age of an object in comparison to another), without necessarily determining their absolute age (i.e. estimated age).

Explanation:

Relative dating  is a way to find the age of an object by comparing it to the known age of things found in the layers of Earth around the object.

Relative dating uses rock layers and index fossils to determine an object's estimated age.

Relative dating is a method of dating archaeological structures or discoveries based on how they are temporally or formally compared to others. This is in contrast to absolute dating, where the material itself dates.

Relative dating can be done by stratigraphic dating, typology or climatic dating.

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