Upper Freeport Coal Bed Point Data (Geology) in Pennsylvania, Ohio, West Virginia, and Maryland

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...本数据集为针对数据点位、上弗里波特煤层（Upper Freeport coal bed）厚度及其海拔（单位：英尺）的属性点覆盖数据集。该文件亦可在……中找到。