Net coal thickness in the southern Piceance Basin, Colorado (ps*thkg)

These are shapefiles and ARC/INFO polygon coverages showing the isopachs of total net coal in beds greater than or equal to 1 ft thick for the Cameo/Fairfield coal...本数据集涵盖形状文件（shapefile）与ARC/INFO多边形覆盖数据集，用于展示卡梅奥/费尔菲尔德煤田内厚度不小于1英尺的煤层的总净煤量等厚线（isopach）……