Madison Group, Williston Basin (13)

Comments on Geologic Parameters

13 Rock/Water Reaction:

The development of karst, sink holes, caves, and solution breccias is common in the Madison Group. A map of three main chemical facies distributions for water (bicarbonate, sulfate, and chloride facies) by Busby (1982, in Downey, 1986) represents this property in the GIS data base.

13 Map:

13 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.