Combination of relative dating and absolute dating techniques Adult telugu pepole chat

In the late 18 century, James Hutton developed the idea that the layers found in rock outcrops were representations of the story of time on the planet.

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The correlations between one area of the Earth and another are largely based on fossil deposits. Lake or other water body sedimentation is another way these layers can be formed.

The Principle of Superposition: As layers are formed, older layers are generally at the bottom of the sedimentation with younger layers being laid over the older ones. An English scientist, William Smith is accredited with the discovery of this idea.

Until the advent or discovery of Radiometric dating, a type of Absolute time dating, there was no way to verify the accuracy of the relative ages of materials found in the various layers of sedimentary rocks.

Rocks which have been dated utilizing one of the various methods of actual Time dating, can be incorporated into a relative time scale.

When scientists are able to determine the age of rocks and fossils, they can then tell a more accurate story of the Earths history.

When Geologists and other scientists refer to the age of the Earth, they are using one of two methods to determine this.

Since there is no set rate of deposit for these layers, the actual length of time represented by these layers is a good guess.

Stratigraphy: is the science or study of layers or strata of rocks.

Sedimentary rocks build up layers from the oldest deposits, at the bottom with the newest at the uppermost layers. Biostratigraphy is a specialized form of Stratigraphy, which uses plant and animal fossils to establish the different layers.

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