Altitude of the top of the middle Fort Union hydrogeologic unit in the Williston structural basin

These data represent the altitude, in feet above North American Vertical Datum of 1988 (NAVD88), of the middle Fort Union hydrogeologic unit in the Williston...本数据集收录了威利斯顿区域内福特联盟组中部水文地质单元的高程数据，其高程值以英尺为单位，基准为1988年北美垂直基准面（North American Vertical Datum of 1988，缩写NAVD88）。