Dr. Steve Dworkin

• Aqueous Geochemistry
• Isotopic Geochemsistry
• Sedimentary Petrology

Ph.D., University of Texas - Austin, 1991
M. S., Michigan State University, 1983
B. A., Albion College, 1981

My interests revolve around using geochemistry to investigate near surface processes. I have recently been working on projects involving climate reconstructions, nutrient pollution, the impact of dust on water chemistry, and fluid flow through thrust faults.

1) Using the oxygen isotopic composition of pedogenic carbonates to calculate ancient Earth temperatures.

Relationship between the oxygen isotopic composition of soil calcite and the mean annual temperature.

Radial fibrous texture of West Texas pedognenic carbonate nodule.

2) Nutrient pollution in the Lake Waco drainage basin.


Nitrate isochems overlain upon land use (rowcrops are shaded).

3) The impact of dust on water chemisty.

The Baylor Geology dust collector sits in a lonely pasture performing its duty. Weathering of dust dominates the water chemistry of central Texas!

Isotope Geochemistry
Aqueous Geochemistry
Mineralogy
Earthquakes and Natural Disasters

Dworkin, S.I., Nordt, L.C ., and Atchley, S.C., 2005, Determining terrestrial paleotemperatures using the oxygen isotopic composition of pedogenic carbonates, Earth and Planetary Science Letters, v. 237 p. 56-68.

Dworkin, S.I., 2005, Origin of radiogenic Sr in surface waters in of central Texas, Geochimica et Cosmochimica Acta, Goldschmidt Conference Abstracts, p. A603.

Monaghan, G.W., Hayes, D.R., Dworkin, S.I., and Voigt, E., 2004, Geoarchaeology of the Brook Run site (44CU122): an Early Archaic jasper quarry in Virginia, USA: Journal of Archaeological Sciences, v. 31, p. 1083-1092.

Atchley, S.C., Nordt, L.C., and Dworkin S.I., 2004, Eustatic control on alluvial sequence stratigraphy: The K/T transition in west Texas, USA: Journal of Sedimentary Petrology, 21 pages.

Nordt, L.C., Atchley, S.C., and Dworkin, S.I., 2003, Terrestrial evidence for two intense greenhouse events in latest Cretaceous time: GSA Today, p. 4-9.

Dworkin, S.I., 2003, The hydrogeochemistry of the Lake Waco drainage basin, Texas: Environmental Geology, v. 45, p. 106-114.

Nordt, L., Atchley, S., Dworkin, S.I., 2002, Paleosol barometer indicates extreme fluctuations in atmospheric CO2 across the Cretaceous-Tertiary boundary: Geology, v. 30, p. 703-706.

Dworkin, S.I., 1999, Geochemical Constraints on the Origin of Thrust Fault Fluids, Geophysical Research Letters, vol. 26, p. 3665-3668.

Gathering thrust fault gouge from the Ogden Thrust in Utah