Madison Group, Williston Basin (12a)
Comments on Geologic Parameters
12a CO2 Solubility Brine: Formation Temperature:
Water in the area varies significantly in temperature and in dissolved solids concentration, and as a result the density and viscosity vary from area to area. Available data for the ground-water temperature of the Madison Group show variations between 46 °F in or near outcrop areas to about 300 °F in some deeper parts of the basin. The units for the water-temperature map by Downey (1986) (modified from MacCay, 1984) are in degrees Celsius.
12a Map:
12a Reference:
Downey, J. S., 1986, Geohydrology of bedrock aquifers in the northern Great Plains in parts of Montana, North Dakota, South Dakota and Wyoming: U.S. Geological Survey Professional Paper 1402-E, 87 p.
Downey, J. S., 1984, Geohydrology of the Madison and associated aquifers in parts of Montana, North Dakota, South Dakota and Wyoming: U.S. Geological Survey Professional Paper 1273-G, 47 p.
