Version History for U.S. Geological Survey Scientific Investigations Map 3462

Bedrock Geologic Map of the Springfield 7.5- x 15-Minute Quadrangle, Windsor County, Vermont, and Sullivan County, New Hampshire

By Gregory J. Walsh, Peter M. Valley, Thomas R. Armstrong, Nicholas M. Ratcliffe, Arthur J. Merschat, and Beau J. Gentry
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First posted online December 22, 2020

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Revised and reposted June 4, 2024, as version 1.1

Revisions:
On map sheet 1 in the Correlation of Map Units, the age given for the sample in unit DSwvf of 399±3 Ma was incorrect. The age was corrected to 423±4 Ma.