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22. Geologic and structure map, with contours on top of the Pierre Shale, for the south half of the Powder River Basin, northeastern Wyoming
23. Geologic and structure map, with contours on top of the Pierre Shale, for the north half of the Powder River Basin, southeastern Montana and northeastern Wyoming
24. Geologic and structure map of the south half of the Powder River Basin and adjacent areas, northeastern Wyoming
25. Geologic and structure map of the north half of the Powder River Basin, southeastern Montana and northeastern Wyoming
26. Bedrock geologic map of the Williamstown and North Adams quadrangles, Massachusetts and Vermont, and part of the Cheshire quadrangle, Massachusetts
27. Bedrock geologic map of the West Dover and Jacksonville quadrangles, Windham County, Vermont
28. Bedrock geologic map of the St. Louis 30ʹ x 60ʹ quadrangle, Missouri and Illinois
29. Bedrock geologic map of the Mount Snow and Readsboro quadrangles, Bennington and Windham counties, Vermont
30. Bedrock geologic map of the Jamaica and part of the Townshend quadrangles, Windham and Bennington counties, Vermont
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