Ranger Minutes are short audiocasts or videocasts in which a park ranger shares interesting stories and information about Grand Canyon National Park.

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In this Ranger Minute, Ranger Joseph Felgenhauer describes a simple way to remember how the Grand Canyon was shaped over time: D.U.D.E.
(The letters stand for Deposition, Uplift, Down cutting and Erosion.)

How Grand Canyon was shaped over time - Running Time 03m 51s - March 2009 Written by Joseph Felgenhauer. Produced by Brian Gatlin and Michael Quinn
Available Downloads
Video for Windows	Video for iPod/Mac		Transcript
14MB WMV File	18MB MP4 File		20kb PDF File

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Often described as Earth's greatest geological showcase, the ensemble of stunning dimensions — the melding of depth, width, and length — sets Grand Canyon apart. Nowhere else features such a dazzling variety of colorful rock layers, impressive buttes, and shadowed side canyons. Grand Canyon is the Illustration: canyon against which all other canyons are compared.

Download Basic Answers to Geological Questions (292kb PDF File)

This is page 7 from the Grand Canyon Guide newspaper.

Grand Canyon Geology Introduction - In Depth Look

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NPS VIEWS - Grand Canyon Geology

Grand Canyon is the result of a distinct and ordered combination of geologic events. Through this virtual experience you will be able to travel into this great chasm and unfold the chapters in Grand Canyon’s geologic history. More...

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