Extent of the Lower Hell Creek aquifer in the Powder River and Williston structural basins

These data represent the extent of the Lower Hell Creek aquifer in the Powder River and Williston structural basins.本数据集呈现了粉河构造盆地（Powder River Basin）与威利斯顿构造盆地（Williston Structural Basin）内下赫尔克里克含水层（Lower Hell Creek Aquifer）的分布范围。