Possibly one of the greatest stratigraphic rock formations is the Grand Canyon.

relative dating techniques include-27relative dating techniques include-21relative dating techniques include-67

In some ways, it is a natural record of the Earth's history.

To understand stratigraphy and relative dating, four basic principles must be mastered.

Though radiometric dating offers a modern way to date rocks, the principles of stratigraphy remain a tried and true way to learn about rock layers.

Stratigraphy, or the scientific study of rock layers, includes relative dating.

This, in turn, can help with dating the rock layers themselves.

An even better way to date rock layers is to identify those species or organisms that have been known to die out or evolve quickly. It shouldn't be assumed that all rock layers can be represented accurately, however.

The relative dating of rocks and fossils can be determined by using the Principle of Superimposition.

To understand the events in one region as compared to another, however, geologists have to stratigraphically correlate them before examining them.

One easy way geologists can determine if young rocks have been moved to the bottom is by examining the layer for broken and faulted pieces.