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Geoscience

Faculty

Dr. John Webster
john.webster@minotstateu.edu
(701) 858-3873 Office 121 CMSC

Geology 101 Environmental Geology
Geology 105 Physical Geology
Geology 210 Minerals and Rocks
Geology 255 Economic and Petroleum Geology
Geology 310 Igneous and Metamorphic Geology
Geology 340 Aqeous Geochemistry
Geology 361 Structural Geology
Geology 421 Applied Hydrogeology
Science 240 Research Methods
Science 480 Senior Seminar

Dr. Webster earned a B.A. degree in 1981 from Hope College with majors in geology and chemistry. After a year in the oil patch (as a mudlogger and well-site geologist), he earned his M.S. degree (geology) in 1985 from Indiana University. He worked for two years as a geochemist with the Illinois Geological Survey from 1994-1996. Dr. Webster returned to Indiana University where he earned a Ph.D. (igneous petrology) in 1992. He started teaching in 1990 at the University of Minnesota-Morris, where he spent three years. He then taught at the University of Wisconsin-Parkside for three years. Dr. Webster arrived at Minot State University in 1996. In addition to teaching introductory courses, he has taught a variety of upper-level courses, primarily hard-rock courses (mineralogy, optical mineralogy, petrology, structural geology), geochemistry, and hydrogeology. He has also been involved in teaching summer field geology through the South Dakota School of Mines and Technology since 1991.

Publications:
Webster, J.R. 1985. Petrochemistry and origin of the plagioclase gneisses of the Killingworth Dome, south-central Connecticut (M.S. Thesis): Indiana University, Bloomington, 64 p.

Webster, J.R., Shiley, R.H., Hughes, R.E., Lapish, P.L., Cowin, D.K., Smith, G.V., Hinckley, C.C Nishizawa, T., Yoshida, N., Wiltowski, T., Wada, Y., and Saporoschenko, M. 1985. Desulfurization of Illinois coal by in-situ preparation of iron sulfide catalysts: Proceedings of the Second Annual Pittsburgh Coal Conference, p. 138-154. Pittsburgh, PA, Sept. 16-20.

Webster, J.R., Shiley, R.H., Hughes, R.E., Hinckley, C.C., Smith, G.V., and Wiltowski, T. 1986. Development of the carbon monoxide-ethanol desulfurization process: Proceedings of the Third Annual Pittsburgh Coal Conference, p. 101-114. Pittsburgh, PA, Sept. 8-12.

Webster, John R., and Wintsch, Robert P. 1987. Petrochemistry and origin of the Killingworth dome rocks, Bronson Hill Anticlinorium, south-central Connecticut: Geological Society of America Bulletin, v. 98, p. 465-474.

Webster, John R., and Wintsch, Robert P. 1988. Chemical and modal compositions of Killingworth Dome rocks, southcentral Connecticut: State Geological and Natural History Survey of Connecticut, Open File Report 88-1.

Wintsch, R.P., Webster, J.R., Bernitz, J.A., and Fout, J.S. 1989. Geochemical and geological criteria for the discrimination of high grade gneisses of intrusive and extrusive origin, Avalon terrane, southern Connecticut: Geological Society of America Special Paper 245, p. 187-207.

Webster, J.R., and Gilstrap, M.S. 1990. Matrix independent separation of rare-earth elements and yttrium from geological materials using constant calcium content-oxalate precipitation and cation exchange for determination by high resolution inductively coupled plasma atomic emission spectroscopy (ICP-AES). Chemical Geology, v. 85, p. 287-294.

Webster, J.R., 1992. Petrology of Quaternary volcanics of the Broken Top and Diamond Peak area, central and south-central Oregon High Cascades: evidence for varied magmatic processes from two contrasting volcanic centers (Ph.D. Dissertation): Indiana University, Bloomington,
430 p.

Abstracts (undergraduate students are underlined)
Webster, John R. and Wintsch, Robert P. 1984. Major element geochemistry and possible subdivision of the Killingworth dome, south-central Connecticut (abs): Geological Society of America Abstracts with Programs, v. 16, no. 1, p. 70.

Webster, J.R., Shiley, R.H., Hughes, R.E., Smith, G.V., Hinckley, C.C., Nishizawa, T., Yoshida, N., Wiltowski, T., Wada, Y., and Saporoschenko, M. 1985. Desulfurization of Illinois coal by in-situ preparation of iron sulfide catalysts (abs): Part III. Illinois Coal Research Board, Third Annual Contractors' Technical Meeting, p. 18. Champaign, IL, October 22-24.

Wintsch, R.P., and Webster, J.R. 1986. New data on the nature and extent of the Avalon Terrane in southern Connecticut (abs): Geological Society of America Abstracts with Programs, 18, no. 1, p. 76.

Webster, J.R., Shiley, R.H., Hughes, R.E., Hinckley, C.C., Smith, G.V., and Wiltowski, T. 1986. Coal desulfurization using ethanol (abs): Alcohol Fuels Conference. Kansas City, MO, August 19-20.

Wintsch, R.P., Webster, J.R., Bernitz, J.A., and Fout, J.S. 1987. Subdivision of Rope Ferry Gneiss, Avalon Terrane, and structural implications (abs): Geological Society of America Abstracts with Programs, v. 19, no. 1, p. 66.

Webster, J.R., and Brophy, J.G. 1988. Evidence for temporal evolution in the relative roles of fractionation and magma mixing at the Broken Top Volcano, central Oregon (abs): Geological Society of America Abstracts with Programs, v. 20, no. 7, p. A196.

Webster, J.R. 1989. Petrology of the Diamond Peak volcano, central Oregon High Cascades: origin of monotonous (but not boring) calc-alkaline andesite (abs): Geological Society of America Abstracts with Programs, v. 21.

Webster, J.R. 1990. Quaternary andesites of the Diamond Peak area, Oregon High Cascades: evidence for melting in the lower crust (abs): Geological Society of America Abstracts with Programs, v. 22.

Webster, J. R. 1992. Quaternary volcanics from the Broken Top Volcano area, Oregon High Cascades: varied low pressure processes in calc-alkaline magma chambers (abs): Geological Society of America Abstracts with Programs, v. 24.

Webster, J. R. 1995. Compositionally monotonous andesite of the Diamond Peak Volcano, south-central Oregon High Cascades: Homogenization or compositional control through invariant point melting? (abs): EOS, Transactions, American Geophysical Union, v. 76.

Webster, J. R. 1996. Petrology of the andesitic-dacitic Todd Lake Volcano, central Oregon High Cascades: Magma mixing in a stratified chamber (abs): Geological Society of America Abstracts with Programs, v. 28

Webster, J. R., and Bell, K. J. 1996. Tertiary volcanics of Sugarloaf Mountain, southeastern Bear Lodge Mountains, Crook County, Wyoming (abs): Geological Society of America Abstracts with Programs, v. 28

Appenzeller, J. C., and Webster, J. R. 1996. Tertiary intrusives exposed at Sheep Mountain, southeastern Bear Lodge Mountains, Crook County, Wyoming (abs): Geological Society of America Abstracts with Programs, v. 28

Knodel, R. E., and Webster, J. R. 1996. Xenoliths and possible effects of assimilation in the Todd Lake basaltic andesite, central Oregon High Cascades (abs): Geological Society of America Abstracts with Programs, v. 28

Spear, B. A., and Webster, J. R. 1996. Petrology of the Ball Butte Volcano, central Oregon High Cascades: Evidence for mixing between basaltic andesite and rhyodacite (abs): Geological Society of America Abstracts with Programs, v. 28

Webster, J. R. 1999. Use of an ICP atomic emission spectrometer and a scanning electron microscope in undergraduate courses and research (abs): Geological Society of America Abstracts with Programs, v. 31, no. 7, p. 320.

"Heavy Mineral Analysis of Sandstones by Rietveld Analysis," J.R. Webster, Roy P. Kight, R.S. Winburn and C.A. Cool, Adv. X-Ray Anal., 46, accepted

"Analysis of Geologic Materials Using Rietveld Quantitative X-Ray Diffraction," R.M.
Gonzalez, T.E. Edwards, T.D. Lorbiecke
, R.S. Winburn, and J.R. Webster, Adv. X-Ray Anal., 46, accepted.

Presentations
"ANALYSIS OF GEOLOGIC MATERIALS USING RIETVELD QUANTITATIVE X-RAY DIFFRACTION (RQXRD)," Timothy D. Lorbiecke, Tom Edwards, John R. Webster, and Ryan S. Winburn, Great Lakes Regional Meeting of the American Chemical Society, Minneapolis, MN,
June 2002.