If your previous Geology course was Earth Science or Natural Disasters, you should read these sections: Definitions and illustrations of the principles of stratigraphy. Be sure to step through all the ...

The study of strata is called stratigraphy, and using a few basic principles, it is possible to work out the relative ages of rocks. In the Grand Canyon, the layers of strata are nearly horizontal.

The course covers the principles of stratigraphy and sedimentation, the processes and products of tectonics, and how mineralogy is key to understanding processes operating on Earth.