Powder River Basin boundary, 1999 Coal Resource Assessment (prbbndg.shp)

This ArcView shapefile contains a polygon representing the boundary of the Powder River Basin based on a generalized contact of Cretaceous and Tertiary rocks. This...本数据集为ArcView形状文件（ArcView shapefile），其中包含一个多边形要素，该要素基于白垩系与第三系岩石的广义接触带，用以表征粉河盆地（Powder River Basin）的边界。