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Timothy Diedesch

Timothy F. Diedesch, Ph. D.
Assistant Professor of Geology
Office: Herty 2113
Phone: 912-478-7913

Academic Background

Ph.D., University of Tennessee, 2016

  • Major: Geology, emphasis in structural geology
  • Dissertation: Kinematic, metamorphic, and geochronologic constraints on the evolution of the Lhagoi Kangri gneiss dome, southern Tibet: insight into mid-crustal processes during Himalayan orogenesis

M.S., Idaho State University, 2011

  • Major: Geology, emphasis in structural geology
  • Dissertation: Kinematic analysis of the Wildhorse detachment fault system, Pioneer Mountains, south-central Idaho

B.S., Sacramento State University, 2008

  • Major: Geology


I am interested in the crustal processes and resulting geologic structures that accommodate orogenesis, through growth and collapse, using a variety of analytical methods in conjunction with traditional field mapping. Current research projects include: constraining the thermomechanical evolution of the Lhagoi Kangri gneiss dome in southern Tibet, geometry and kinematics of lithotectonic boundaries in the central Georgia Piedmont, and detailed structural analysis of the Modoc Fault Zone. My research involves a variety of analytical techniques such as microstructural analysis (using both petrographic microscope and electron backscatter diffraction methods), electron probe microanalysis, phase-equilibria modeling, and laser-ablation split-stream (LASS) petrochronology. Collectively, these tools are used to create models of the pressure, temperature, and deformation history of middle and lower crustal rocks.


  • Structural Geology
  • Field Methods
  • Introduction to the Earth Lab
  • Environmental Science Lab


Jessup, M.J., Langille, J., Diedesch, T.F., Cottle, J., 2019, Gneiss dome formation in the Himalaya  and southern Tibet, in Treloar, P.J. and Searle, M.P., eds., Himalayan Tectonics: A Modern  Synthesis: Geological Society, London, Special Publication 483, doi: 10.1144/SP483.15.  

Diedesch, T., Jessup, M.J., Cottle, J.M., Zeng, L., 2016, Tectonic evolution of the middle crust in southern Tibet from structural and kinematic studies in the Lhagoi Kangri gneiss dome: Lithosphere, v. 8, p. 480–504, doi: 10.1130/L506.1.

Diedesch, T., Jessup, M.J., Cottle, J.M, Zeng, L., in review, Barrovian metamorphism and ductile thinning in Lhagoi Kangri dome, southern Tibet: Journal of Metamorphic Geology.

Diedesch, T., Rodgers, D.W., Link, P.K., 2012, Geologic Map of Portions of the Phi Kappa Mountain, Hyndman Peak, and Grays Peak Quadrangles, Blaine and Custer Counties, Idaho: Idaho Geological Survey Map T-12-4, scale 1:24 000, 1 sheet.

Vogl, J. J., Foster, D.A., Fanning, C.M., Kent, K.A., Rodgers, D.W., and Diedesch, T., 2012, Timing of extension in the Pioneer metamorphic core complex with implications for the spatial-temporal pattern of Cenozoic extension and exhumation in the northern U.S. Cordillera: Tectonics, v. 31, 22 p.

Last updated: 8/19/2021