Today, in the deepest part of the Grand Canyon, the Colorado River flows past rocks that are 1.7 billion years old. This video describes how the river cut vertically through layers of pre-existing rock as the plateau...
Created by Lang Moore, Bill Mueller and David Smith for the Connected Curriculum Project, the purpose of this module is to establish the meanings of gradient and directional derivative in the context of a contour map of...
If you are having difficulty remembering the details of the Earth's geological structure or the nature of major minerals and rock types, you can consult this excellent introductory course offered as part of MIT's...
Hosted by Arizona State University, this site contains balloon photographs taken from above the Apache Junction. A series of geologic structures are shown by these photographs. It gives a comprehensive look at...
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