Lower Kittanning Coal Bed County Statistics (Chemistry) in Pennsylvania, Ohio, West Virginia, and Maryland

This dataset is a polygon coverage of counties limited to the extent of the Lower Kittanning coal bed resource areas and attributed with statistics on these coal...本数据集为限定于下基坦宁（Lower Kittanning）煤层资源区域范围内的县级多边形覆盖数据集，并附带了该类煤炭相关的统计属性信息……