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is, as mentioned earlier, the technique of piecing together the informational content of separated outcrops.When information derived from two outcrops is integrated, the time interval they represent is probably greater than that of each alone.PALEONTOLOGY, AND in particular the study of dinosaurs, is an exciting topic to people of all ages.Although most attention in today's world focuses on dinosaurs and why they became extinct, the world of paleontology includes many other interesting organisms which tell us about Earth's past history.Stratigraphy is a branch of geology that studies rock strata with an emphasis on distribution, deposition, age and evidence of past life.Nicolas Steno, William Smith, Georges Cuvier, Alexandre Brongniart, and James Hutton developed the basic rules for the science of stratigraphy.

The most useful indication of time equivalence is similar fossil content, provided of course that such remains are present.

The realization that sediments turn into rock was counter to the view that all rocks on Earth formed in a single creation event.

Once Steno recognized that the fossils he was contemplating (sharks teeth and sea shells) were formed in the sediments of oceans he was able to work out the basic rules of stratigraphy.

Time factors of millions and billions of years is difficult even for adults to comprehend.

However, "relative" dating or time can be an easy concept for students to learn.

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