University of Texas at Austin

Madison Group, Williston Basin (10)

Comments on Geologic Parameters

10 Fluid Residence Time:

An area of minimal ground-water flow on the northeastern flank of the Williston Basin coincides with the area of high concentration of dissolved solids, as shows on the map by Downey (1986), digitized for this parameter. Rate of movement of about 2 ft/yr is calculated for this north area.

10 Map:

map

10 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.

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