A study of fossils in different sedimentary layers indicates the geological period in which they existed. Explain.
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If we dig the earth and find fossils,the deepest layers generally contain the oldest fossils,as compared to the surface layers. So, by this we could say that study of fossils in different sedimentary layers indicates the geological period in which they existed.
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Fossils: Remains of hard parts of animals like bones, teeth, etc in layers of rock that existed some time in the geological history of the Earth are termed as Fossils.
How Fossils are formed?
- When the rocks on the earth's surface get weathered, sediments travel via natural agents like wind, water, etc.
- These sediments form layers that further solidify to form rocks called as Sedimentary rocks.
- Organism or its part that get trapped inside such rocks during the layer formation becomes fossil.
- Fossil evidence is a milestone discovery in evolutionary studies as they help us to trace the history of an organism from its very beginning.
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