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

In this activity, students begin a sequencing activity with familiar items — letters written on cards.

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Relative dating requires an extensive knowledge of stratigraphic succession, a fancy term for the way rock strata are built up and changed by geologic processes.

PALEONTOLOGY, AND in particular the study of dinosaurs, is an exciting topic to people of all ages.

Learn how inclusions and unconformities can tell us stories about the geologic past.

We'll even visit the Grand Canyon to solve the mystery of the Great Unconformity!

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.

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.

Once they are able to manipulate the cards into the correct sequence, they are asked to do a similar sequencing activity using fossil pictures printed on "rock layer" cards.

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