Upper Freeport Coal Bed Remaining Resources by County in Pennsylvania, Ohio, West Virginia, and Maryland

This dataset is a polygon coverage of counties limited to the extent of
the Upper Freeport coal bed resource areas and attributed with remaining
resources (millions of short tons) in aggregated reporting categories as described
in USGS Circular 891. The file has been generalized from detailed geologic
coverages found elsewhere in Professional Paper 1625-C.

本数据集为范围限定于上弗里波特煤层资源分布区域的县级多边形覆盖图层，其附带属性为按照美国地质调查局（USGS）第891号通报中规定的聚合报告类别统计的剩余资源量，单位为百万短吨。本文件源自《专业论文集1625-C》其他章节中的详细地质覆盖图层，经概化处理后得到。