Lower Cretaceous aquifers

This data set represents the extent of the Lower Cretaceous aquifers in the states of Montana, Wyoming, South Dakota, Kansas, Nebraska, Iowa, and Minnesota..本数据集展示了蒙大拿州、怀俄明州、南达科他州、堪萨斯州、内布拉斯加州、艾奥瓦州以及明尼苏达州境内下白垩统含水层的分布范围。