Geodatabase of the datasets used to represent the 4 subareas of the Lower Cretaceous aquifer, Iowa, Kansas, Minnesota, Montana, Nebraska, North Dakota, South Dakota, and Wyoming

This geodatabase includes spatial datasets which represent the Lower Cretaceous aquifer system in the States of Iowa, Kansas, Minnesota, Montana, Nebraska, North...本地理数据库（geodatabase）包含空间数据集，用于表征美国艾奥瓦州、堪萨斯州、明尼苏达州、蒙大拿州、内布拉斯加州及北……范围内的下白垩纪含水层系统。