Revision History for U.S. Geological Survey Scientific Investigations Map 3407

By Daniel H. Doctor and Ronald A. Parker

Geologic Map of the Hayfield Quadrangle, Frederick County, Virginia

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Posted online August 1, 2018

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Revised and reposted February 6, 2019

The map sheet text was modified. In the "Discussion" section, the location of the broad region of elongated valleys and ridges was corrected to west of Little North Mountain.