Upper Freeport Coal Bed Point Data (Geology) in Pennsylvania, Ohio, West Virginia, and Maryland
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资源简介：
This dataset is a point coverage of attributes on data location, thickness of the Upper Freeport coal bed, and its elevation, in feet. The file is also found as an ASCII Appendix of Chapter D, Disc 1 found elsewhere in Professional Paper 1625-C.
创建时间：
2000-01-01
