Susan Cashman

Professor Emeritus

My research integrates field-based structural studies and geologic mapping with kinematic and microstructural analysis to address tectonic questions.  My interests include structures in active fault zones (from deformation bands to fault rocks), structural development of active margins, and regional tectonics of the western United States.  I’m currently involved in a collaborative project with undergraduate and graduate students and other researchers to investigate the tectonic development of the southern Cascadia forearc using a combination of field studies, thermochronometry, and geodynamic modelling.

Specialty Area

Structural geology, tectonics


Honorary Doctorate of Science, Middlebury College, 2008
Ph.D., Geology, Univ. of Washington, 1977
M.S., Geology, Univ. of Washington, 1974
B.A., Geology, Middlebury College, 1972


Gomberg, J., P. Bodin, J. Bourgeois, S. Cashman, D. Cowan, K. Creager, B. Crowell, A. Duvall, A. Frankel, F. Gonzalez, H. Houston, P. Johnson, H. Kelsey, U. Miller, E. Roland, D. Schmidt, L. Staisch, J. Vidale, W. Wilcock, and E. Wirth, 2016, Planning for a Subduction Zone Observatory: EOS, 97, doi:10.1029/2016EO052635.

Piotraschke, R., S.M. Cashman, K.P. Furlong, P.J.J. Kamp, and G. Xu, 2015, Unroofing the Klamaths – Blame it on Siletzia: Lithosphere, doi: 10.1130/L418.1

Kaproth, B.M., Cashman, S.M., and Marone, C., 2010, Deformation band formation and strength evolution in unlithified sand: the role of grain breakage: Journal of Geophysical Research, v.115, B12103, doi:10.1029/2010JB007406.

Batt,. G.E., Cashman, S.M., Garver, J.I., and Bigelow, J.J., 2010, Thermotectonic evidence for two-stage extension on the Trinity detachment surface, Eastern Klamath Mountains, California: American Journal of Science, v.310, p.261-281, DOI 10.2475/04.2010.12.

Cashman, S.M., Baldwin, J.N., Cashman, K.V., Swanson, K., and Crawford, R., 2007, Microstructures developed by coseismic and aseismic faulting in near-surface sediments, San Andreas Fault: Geology, v.35, p.611-614; doi: 101130/G23545A.1

Cashman, S.M., and Cashman, K.V., 2006, Cataclastic textures in La Grange fault rocks, Klamath Mountains, California: in Snoke, A.W., and Barnes, C.G., eds., Geological studies in the Klamath Mountains province, California and Oregon: A volume in honor of Wiliam P. Irwin: Geological Society of America Special Paper 410, p. 433-450, doii: 10.1130/2006.2410(21).

Schermer, E.R., R. Van Dissen, K.R. Berryman, H.M. Kelsey, and S.M. Cashman, 2004, Active faults, paleoseismology and historical fault rupture in the northern Wairarapa, North Island, New Zealand: New Zealand Journal of Geology and Geophysics, v.47, p.101-122.

Cashman, S.M. and Elder, D.R., 2002, Post-Nevadan detachment faulting in the Klamath Mountains, California: Geological Society of America Bulletin, v. 114, no. 12, p. 1520-1534.

Baldwin, J.N., A.D. Barron, K.I. Kelson, J.B. Harris, and S.M. Cashman, 2002, Preliminary paleoseismic and geophysical investigation of the North Farrenburg Lineament: Primary tectonic deformation associated with the New Madrid North Fault?: Seismological Research Letters, v. 73, no. 3, p. 393-413.

Cashman, S.M. and Cashman, K.V., 2000, Cataclasis and deformation band formation in unconsolidated marine terrace sand, Humboldt County, California: Geology, v. 28, no.2, p.111-114.

Kelsey, H.M., A.G. Hull, S.M. Cashman, K.R. Berryman, P.H. Cashman, J.T. Trexler, and J.G. Beggs, 1998, Paleoseismology of an active reverse fault in a forearc setting: The Poukawa fault zone, Hikurangi forearc, New Zealand: Geological Society of America Bulletin, v. 110, no. 9, p. 1123-1148.

Kelsey, H.M., S.M. Cashman, S. Beanland, and K.R. Berryman, 1995, Structural evolution at the inboard margin of the acccretionary wedge, Hikurangi forearc, New Zealand: Tectonics, v. 14, no.1, p.1-18.

Cashman, S. M., Kelsey, H. K., and Harden, D. R., 1995, Geology of the Redwood Creek basin, Northwestern California: U.S. Geological Survey Professional Paper 1454, Nolan, M., Kelsey, H., and Marron, D., eds., p. B1-B13.

Kelsey, H.M., C.F. Erdman, and S.M. Cashman, 1993, Geology of southern Hawkes Bay from the Maraetotara Plateau and Waipawa westward to the Wakarara Range and the Ohara Depression: Institute of Geological and Nuclear Sciences Science Report 93/2, 17p., Institute of Geological and Nuclear Sciences Limited, Lower Hutt, New Zealand.

Elder, D.R. and Cashman, S.M., 1992, Tectonic control and fluid evolution in the Quartz Hill, California, lode gold deposits:  Economic Geology, v. 87, p. 1795-1812.

Cashman, S. M., Kelsey, H. M., Erdman, C., Cutten, H. N. C., and Berryman, K. R., 1992,  A Structural Transect and Analysis of Strain Partitioning across the Forearc of the Hikurangi Subduction Zone, Southern Hawkes Bay, North Island, New Zealand: Tectonics, v.11, no.2, p. 242-257.

Cashman, S. M. and Kelsey, H. M., 1990, Forearc Uplift and Extension, Southern Hawke's Bay, New Zealand:  Mid-Pleistocene to Present:  Tectonics, v. 9, no. 1, p.23-44.

Cashman, S. M., 1988, Finite strain patterns associated with Nevadan deformation in the western Klamath Mountains, California--Possible structural evidence for large post-Nevadan tectonic rotation: Geology, v. 16, p. 839-843.

Cashman, S. M., Cashman, P. H., and Longshore, J. D., 1986, Deformational History and Regional Tectonic Significance of the Redwood Creek Schist, Northwestern California:  Geol. Soc. America Bull., v. 97, no. 1, p. 35-47.

Kelsey, H. M., and Cashman, S. M., l983, Wrench faulting in Northern California and its tectonic implications:  Tectonics, vol. 2, no. 6, p. 565-576.

Cashman, S. M., l980, Devonian metamorphism in the northeast Klamath Mountains, California:  Geol. Soc. America Bull., Part 1, v. 9l, p. 453-459.

McCulloh, T. H., Cashman, S. M., and Stewart, R. J., 1978, Diagenetic baselines for interpretive reconstructions of maximum burial depths and paleotemperatures in clastic sedimentary rocks:  D. F. Oltz, Ed., Symposium in Geochemistry, Low Temperature Metamorphism of Kerogen and Clay Minerals, Soc. Econ. Paleontologists and Mineralogists Spec. Pub., p. 18-46.

Bostick, N. H., Cashman, S. M., McCullock, T. H., and Waddell, C. T., 1978, Gradients of vitrinite reflectance and present temperature in the Los Angeles and Ventura Basins, California:  D. F. Oltz, Ed., Symposium in Geochemistry, Low Temperature Metamorphism of Kerogen and Clay Minerals, Soc. Econ. Paleontologists and Mineralogists Spec. Pub., p. 65-96.

Cashman, S. M., and Whetten, J. T., 1976, Low-temperature serpentinization of peridotite fanglomerate on the west margin of the Chiwaukum Graben, Washington:  Geol. Soc. America Bull., vol. 87, p. 1773-1776.