When will a fossil be used in finding the absolute age of rocks?
if it for a limited period of time and in a wide area
if it existed for a long period of time and in a wide area
if it existed for a limited period of time and in a small area
if it existed for a long period of time and in a small area

Geologists use a variety of techniques to establish absolute age, including radiometric dating, tree rings, ice cores, and annual sedimentary deposits called varves. Radiometric dating is the most useful of these techniques—it is the only technique that can establish the age of objects older than a few thousand years.

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OlanmaE OlanmaE · Answer 2 · 2021-08-16T10:06:52+02:00

A fossil will used in finding the absolute age of rocks if it A. existed for a limited period of time and in a wide area.

Index fossils are used in differentiating one layer of rock from another and they make use of the Principle of Faunal Succession which states that fossil species appear and disappear in the same order and that once a fossil specie disappears, it cannot reappear in younger rocks.

Index fossils exist for a limited period of time, they can be identified with ease, and they can be found across a wide area. Rodents are examples of index fossils. They have wide distributions and evolve rapidly.

If an unidentified fossil and index fossil are found in the same layer of rock, they must have existed at the same time.

Thus, a fossil will be used in finding the absolute age of rocks if it existed for a limited time and in a wide area.

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