St. Mary's University 1 Camino Santa MariaSan Antonio, TX 78228 +1-210-436-3011 St. Mary's University logo William Joseph Chaminade


  • Ph.D., University of Texas at San Antonio, 2007
  • M.S., Texas State University, 2000
  • B.S., Mount Union College, 1996


Evelynn Mitchell, Ph.D., earned her doctorate from the Environmental Science and Engineering program at The University of Texas at San Antonio. Mitchell taught physics at the University of the Incarnate Word prior to pursuing her Ph.D. She also gained experience in engineering and applied physics working as a manufacturing engineer at Sony Semiconductor from 2000 to 2003.

Mitchell focused on studying the Edwards Aquifer in her dissertation research, in which she used a combination of hydrogeology and geophysical skills to determine specific storage values using the compression of earthquake waves. She has also performed geophysics research using seismic and resistivity applications to look at the underlying geology and water table in the Texas Hill Country and in Jalisco, Mexico.

As a professor at St. Mary’s University, Mitchell has worked with students in studying carbon dioxide levels in local caves using ground penetrating radar to detect voids, and using electrical resistivity to examine subsurface locations. Mitchell also represents St. Mary’s University on the West Side Creeks Oversight Committee, which draws on her background in hydrogeology.


E.L. Patrick, K.E. Mandt, E.J. Mitchell, J.N.Mitchell, K.N. Younkin, C.M.Seifert, and G.C. Williams. (2012). “A Prototype Mass Spectrometer for In Situ Analysis of Cave Atmospheres,” Rev. Sci. Instrum. 83, 105116;

Mitchell, E. J., Patrick, E.L., Mandt, K.E., Mitchell, J.N., and Williams, G.C., (2012) In-Situ Measurements of Air Samples from Groundwater Wells with a Field Deployable Mass Spectrometer, Geological Society of America Abstracts with Programs. Vol. 44, No. 7, p.313

Sobery, A.C., Mitchell, E.J., and Turner, D.R., (2012) Ongoing Development of Hands-On Demonstrations for Environmental Science Outreach at the Elementary Level, Geological Society of America Abstracts with Programs. Vol. 44, No. 7, p.98

Sobery, A., D.R. Turner, E.J. Mitchell. (2012) Development of Earth Science Hands-on Exhibits for STEM Enrichment at the Elementary Level. Geological Society of America Vol. 44, No. 1.

Seifert, C., E.J. Mitchell, K.E. Mandt, E.L Patrick. (2012) Comparison of Infrared and Quadrupole Mass Spectrometer Measurements of Carbon Dioxide in Cave Environments, Geological Society of America, Vol. 44, No. 1.

Mandt, K.E., E.L. Patrick, E.J. Mitchell, J.N. Mitchell and K.N. Younkin. (2012) In-Situ Mass Spectrometer Measurements of Cave Atmospheres as an Analogue to Future Planetary Cave Missions. Proceedings of the 43rd Lunar and Planetary Science Conference. Abstract #1442.

Mitchell, E. J., J.N. Mitchell, E.L. Patrick, K.E. Mandt and K.N. Younkin. (2011) In-Situ Meteorology and Elemental Composition of Cave Atmospheres in Texas. First International Planetary Caves Workshop Program and Abstract Volume, p. 17.

Duran, L. and E. J. Mitchell. (2010) Meteorological Measurements of Three South Texas Caves in Differing Geological Formations. Geological Society of America Abstracts with Programs, Vol. 42, No. 2, p. 67.

Duran, L. E. J. Mitchell – Mentor. (2010) A Study of Meteorological Differences Between Caves in Different Geologies. St. Mary’s University McNair Scholars Research Journal, Volume II, 2009-2010.

Mitchell, E. J. October (2008) Storativity from Seismic Waves: Using Rayleigh Waves for Seismic Efficiency Calculations. 2008 Joint Meeting of The Geological Society of America, Soil Science Society of America, American Society of Agronomy, Crop Science Society of America, Gulf Coast Association of Geological Societies with the Gulf Coast Section of SEPM, Houston, Texas. Geological Society of America 2008, 190-11.

Mitchell, E. J. R. and A. R. Dutton. (2007) Specific Storage Results for the Edwards Aquifer Using the Seismic Efficiency Method, National Ground Water Association 2007 Groundwater Summit, Albuquerque, New Mexico.

Mitchell, E.J.R. and A. Dutton. (2007) Calculation of Specific Storage in the Edwards (Balcones Fault Zone) Aquifer, Central Texas, Using Seismic Efficiencies. Report for the Edwards Aquifer Authority, San Antonio, Texas, pp. 34.

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