Extent of the middle Fort Union hydrogeologic unit in the Powder River and Williston structural basins

These data represent the extent of the middle Fort Union hydrogeologic unit in the Powder River and Williston structural basins.本数据集展示了鲍威尔河（Powder River）与威利斯顿（Williston）构造盆地区域内的中Fort Union水文地质单元（middle Fort Union hydrogeologic unit）的分布范围。