Stephen Fisher is interested in all aspects of the geochemistry of water-rock interactions. Previous work includes the use of strontium isotopes to trace ground-water origin, geochemical evolution of minerals and fluids during diagenesis, the origin and chemical evolution of deep basinal brines, geochemistry of ground water in the arid southwest, clay diagenesis in evaporite environments, and the geologic and geochemical controls on naturally occurring radioactive materials associated with oil and gas operations.

Prior to joining the Kentucky Geological Survey in 1996, Dr. Fisher was a Research Scientist and Program Manager at the University of Texas Bureau of Economic Geology. At the Kentucky Geological Survey he is Coordinator of Ground-Water Monitoring Networks and has provided technical assistance to state agencies involved with remedial activities at the Maxey Flats Disposal Site and the Paducah Gaseous Diffusion Plant. Current research involves mapping and evaluating ground-water quality throughout Kentucky, and statistical analysis of ground-water data.

Fisher, R.S., and Goodmann, P.T., 2002, Characterizing groundwater quality in Kentucky: From site selection to published information: Proceedings, National Water Quality Monitoring Council Conference, Madison, Wisconsin, 9 p.

Fisher, R. S., 1998, Geologic and geochemical controls on naturally occurring radioactive material (NORM) in produced waters from oil, gas, and geothermal operations, Environmental Geosciences, v. 5, no. 3, p. 139-150.

Fisher, R. S., and Mullican, III, W. F., 1997, Hydrochemical evolution of sodium-sulfate and sodium-chloride groundwater beneath the northern Chihuahuan Desert, Trans-Pecos Texas, USA: Hydrogeology Journal, v. 5, no. 2, p. 4-16.

Fisher, R. S., Posey, H. H., and Kyle, J. R., 1989, Successive pore fluid generations in a Lower Permian brine aquifer, Palo Duro Basin, Texas Panhandle, USA: Applied Geochemistry, v. 4., p. 455-464.

Fisher, R. S., 1988, Clay minerals in evaporite host rocks, Palo Duro Basin, Texas Panhandle: Journal of Sedimentary Petrology, v. 58, no. 5, p. 836-844.

Fisher, R. S., and Hovorka, S. D., 1987, Relations between bromide content and depositional processes in bedded halite, Permian San Andres Formation, Palo Duro Basin, Texas: Carbonates and Evaporites, v. 2, no. 1, p. 67-82.

Fisher, R. S., and Kreitler, C. W., 1987, Geochemistry and hydrodynamics of deep-basin brines, Palo Duro Basin, Texas, USA: Applied Geochemistry, v. 2, p. 459-476.

Fisher, R. S., and Land L. S., 1986, Diagenetic history of Eocene Wilcox sandstones, South-Central Texas: Geochimica et Cosmochimica Acta, v. 50, p. 551-561.

Fisher, R. S., 1981, Characterization of uranium ores from the House-Seale deposit, Catahoula Formation, Texas Coastal Plain: Gulf Coast Association of Geological Societies Transactions, v. 31, p. 91-95.

Fisher, R. S., and Stueber, A. M., 1976, Strontium isotopes in selected streams within the Susquehanna River Basin: Water Resources Research, v. 12, no. 5, p. 1061-1068.