Upper Freeport Coal Bed County Statistics (Geology) in Pennsylvania, Ohio, West Virginia, and Maryland
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资源简介：
This dataset is a polygon coverage of counties limited to the extent of
the Upper Freeport coal bed resource areas and attributed with statistics on
the thickness of the Upper Freeport coal bed, its elevation, and overburden
thickness, in feet. The file has been generalized from detailed geologic
coverages found elsewhere in Professional Paper 1625-C.
创建时间：
2016-12-01
