Introduction:
Descriptions of the geology of the United States and areas within it have existed since before the American Revolution. Survey teams exploring new lands included geologists, who described potential resources of each region. Many states and territories commissioned surveys or established agencies to evaluate, identify, and map land, mineral, water, and energy resources. These agencies have issued at least one report describing the geology of their state, in addition to others describing the geology and resources of smaller areas. In addition, plate tectonics has revolutionized geologists' inte…
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About the author:
Linda R. Zellmer is science, government information, and data services librarian at Western Illinois University.
