Dallas D. Rhodes

Chair, Department of Geology and Geography
Professor of Geology

Research

My research interests are currently focused on the neotectonics and tectonic geomorphology of active strike-slip faults in California. For more than 10 years I have conducted investigations of the Carrizo Plain segment of the San Andreas fault. On going studies include modeling of channel and hillslope response to tectonic displacements. With the Landers (California) earthquake of June 28, 1992, my colleagues and I began a study of the Galway Lake Road scarp formed along the Emerson fault. This continuing investigation documents the initial evolutionary development of a fault scarp. A third project concerns the Cholame segment of the San Andreas. This fault segment is located between the Parkfield segment where moderate-sized earthquakes release accumulated stress fairly frequently (20-50 years) and the Carrizo segment where stress release occurs in major events that recur at ~300 year intervals. Work in the poorly documented Cholame segment has involved geologic mapping and surveying of tectonic landforms.

I am also part of the "Soda Lake Interdisciplinary Project" (SLIP) which has as its objective an understanding of the paleoenvironmental and tectonic history of the Carrizo Plain. Other members of the team include Dr. Lisa M. Pratt of the Indiana University Biogeochemical Laboratory and Dr. J Ramon Arrowsmith of Arizona State University's Active Tectonics Program.

My current efforts are directed at the geomorphology of the Soda Lake basins and the clay dunes that border them. A Web-based version of some of the results produced by the SLIP Project is available.

Recent Publications

Links are provided to the home pages of some collaborators.

• Arrowsmith, J.R., and Rhodes, D.D., 1989, Geomorphic responses of ephemeral streams to strike-slip movement along the San Andreas Fault, Carrizo Plain, San Luis Obispo County, California: Geological Society of America Abstracts with Programs, v. 21, no. 6, p. A59.
  
• Rhodes, D.D., and Arrowsmith, J.R., 1991, Variation and evolution of gullies formed on a pressure ridge adjacent to the San Andreas Fault, Carrizo Plain, California: Geological Society of America Abstracts with Programs, v. 23, p. A91.
  
• Wadsworth, W.B., Ferriz, H.G., and Rhodes, D.D., 1991, Early Jurassic tectonics and volcanism in the Cowhole Mountains, eastern Mojave Desert, California: Geological Society of America Abstracts with Programs, v. 23, p. A249.
  
• Arrowsmith, J.R., and Rhodes, D.D., 1992, Kinematics, structure, and degradation of pressure ridges along the San Andreas Fault in the Carrizo Plain, San Luis Obispo County, California: Geological Society of America Abstracts with Programs, v. 24, p. A3.
  
• Rhodes, D.D., and Arrowsmith, J.R., 1993, Original form and initial modification of scarps produced by the Landers, California earthquake of June 28, 1992: Geological Society of America Abstracts with Programs, v. 25, p. A460.
  
• Arrowsmith, JR., and Rhodes, D.D., 1994, Original forms and initial modifications of the Galway Lake Road scarp formed along the Emerson Fault during the 28 June 1992 Landers, California earthquake: Bulletin of the Seismological Society of America, v. 84, p. 1-17.
  
• Arrowsmith, J.R., Pollard, D.D., and Rhodes, D.D., 1994, A quantitative model for geomorphic and tectonic displacements applied to hillslope development in areas of active tectonics: Geological Society of America Abstracts with Programs, v. 26, no. 7, p. A207.
  
• Arrowsmith, J.R., Pollard, D.D., and Rhodes, D.D., 1994, A model for geomorphic and tectonic displacements applied to hillslope development in areas of active tectonics: EOS, Transactions, American Geophysical Union, v. 75, no. 44, p. 289.
  
• Judson, S., Bonini, W., Rhodes, D.D., and Rossbacher, L.A., 1996, Physical geology: the lab book: Upper Saddle River, New Jersey, Prentice-Hall, Inc., 236 p.
  
• Wadsworth, W.B., Ferriz, H.G., and Rhodes, D.D., 1995, Structural and stratigraphic development of the Middle Jurassic magmatic arc in the Cowhole Mountains, central-eastern Mojave Desert, California; in Miller, D.M. and Busby, C., eds., Jurassic magmatism and tectonics of the North American Cordillera: Geological Society of America Special Paper 299 (Armstrong Volume), p. 327-349.
  
• Arrowsmith, J.R., Pollard, D.D., and Rhodes, D.D., 1995, Morphologic dating of scarps along the San Andreas Fault, Carrizo Plain, California and progressive deformation along the Big Bend: Geological Society of America Abstracts with Programs, v. 27, no. 6, p. A221-A222.
  
• McAdam, S.C., and Rhodes, D.D., 1995, A hydrogeological analysis of groundwater law in Nevada: Geological Society of America Abstracts with Programs, v. 27, no. 6, p. A233-A234.
  
• Arrowsmith, J.R., Pollard, D.D., Hilley, G., and Rhodes, D.D., 1995, Morphologic dating of scarps along the San Andreas fault, Carrizo Plain, California and progressive deformation along the Big Bend: EOS, Transactions, American Geophysical Union, v. 76, no. 46, p. F575.
  
• Arrowsmith, J.R., Pollard, D.D., and Rhodes, D.D., 1996, Hillslope development in areas of active tectonics: Journal of Geophysical Research, v. 101, p. 6255-6275.
  
• McCarthy, J.C., and Rhodes, D.D., 1997, A hydrogeological analysis of Colorado groundwater law: Geological Society of America Abstracts with Programs, v. 29, no. 6, p. A268-A269.
• Eigenbrode, J., Davis, C., Pratt, L.M., Arrowsmith, J.R., Rhodes, D.D., and Rossbacher, L.A., 1997, Climate change recorded by sedimentary organic matter in Soda Lake, southern California: Geological Society of America Abstracts with Programs, v. 29, no. 6, p. A155.
• Arrowsmith, J.R., Grant, L., and Rhodes, D.D., 1997, Investigation of historic and paleoseismic behavior of the south-central San Andreas Fault between Cholame and the Carrizo Plain: Southern California Earthquake Center Annual Meeting Abstracts.
• Arrowsmith, J.R., Rhodes, D.D., and Pollard, D.D., 1998, Morphologic dating of scarps formed by repeated slip events along the San Andreas Fault, Carrizo Plain, California: Journal of Geophysical Research, v. 103, p. 10141-10160.
• Rhodes, D.D., Arrowsmith, J R., Kilpatrick, J.P., and Eigenbrode, J., 1998, Clay dunes at Soda Lake, Carrizo Plain, California: Geological Society of America Abstracts with Programs, v. 30, no. 7, p. A140.
• Stone, E.M., Arrowsmith, J R., Rhodes, D.D., Grant, L., 1998, Fault zone geometry and historic displacement along the Cholame Segment of the San Andreas Fault, Southern California: Southern California Earthquake Center Annual Meeting Abstracts.
• Mora, German, Pratt, Lisa M., Eigenbrode, J., Rhodes, D.D., 1998, Biogeochemical dynamics and evolution of gypsiferous soils in the Carrizo Plain, California: Geological Society of America Abstracts with Programs, v. 30, no. 7, p. A359.
• Eigenbrode, J.L., Pratt, L.M., Rhodes, D.D., Arrowsmith, JR., Mora, G., 1999, Sedimentological and carbon-isotopic records of late Holocene climate in the sediments of Soda Lake, Carrizo Plain, California: Geological Society of America Abstracts with Programs, v. 31, p. 361.
• Judson, S., Bonini, W.E., Rhodes, D.D., and Rossbacher, L.A., 2000, The lab book: problem solving in geology [2nd edition]: Upper Saddle River, New Jersey, Prentice Hall, 250 p.
• Arrowsmith, JR., and Rhodes, D.D., 2000, A 3-stage model for erosional modification of the Emerson Fault (Landers earthquake) scarp, June 1992-January 2000: Geological Society of America Abstracts with Programs, v. 32, p. A-366.
• Runnerstrom, E. E., Grant, L. B., Arrowsmith, J.R., and Rhodes, D.D., 2001, Preliminary measurement of earthquake displacement and post-1857 strain accumulation along the Cholame segment of the San Andreas fault: Seismological Society of America Abstracts.
• McAdam, S.C., McCarthy, J.C., and Rhodes, D.D., 2001, Preparing for "uncivil" actions: geology, law school, and the practice of environmental law: Geological Society of America Abstracts with Programs, v. 33, p. A192.
• Runnerstrom, E. E., Grant, L. B., Arrowsmith, J.R., Rhodes D.D., and Stone, E.M., 2002, Displacement across the Cholame segment of the San Andreas Fault between 1855 and 1893 from cadastral surveys: Bulletin of the Seismological Society of America, v. 92, p. 2659-2669.
• Rhodes, D.D., Arrowsmith, J.R., Eigenbrode, J.L., Liu, J., Pratt, L.M., 2002, Synchronous geomorphic response to Holocene climate change in the Carrizo Plain, California: Geological Society of America Abstracts with Programs, v. 34., p. 246.
• Hilley, G.E. Arrowsmith, JR., and Rhodes, D.D., in review, Systematic landform response to uplift along the Dragon's Back pressure ridge, Carrizo Plain, California.
• Rhodes,D.D. and Yocum, G.R., 2003, Cosmologies: Combining science and religious studies to enhance students' understanding of time and their relationshis with the physical universe and its inhabitants: Geological Society of America Abstracts with Programs, v. 35, no. 6, p. 155.
• Rhodes, D. D., and Rich, F. J., 2004, Luminescence dating and palynology of the Soda Lake clay dune complex, Carrizo Plain, San Luis Obispo County, California: Geological Society of America Abstracts with Programs, v. 36, p. 513.
• Rossbacher, L.A., and Rhodes, D.D., 2004, Losing ground-geology departments in the 21st century: Geological Society of America Abstracts with Programs, v. 36, p. 351.
• Trupe, C.H., and Rhodes, D.D., 2004, Field experiences for undergraduates at Georgia Southern University: opportunities and challenges of a Coastal Plain setting: Geological Society of America Abstracts with Programs, v. 36, p. 163.
• Rhodes, D.D., and Arrowsmith, JR., 2004, The synoptic view as a model for poster presentations: EOS Transactions of the American Geophysical Union, v. 85, Fall Meeting Supplement, Abstract ED51A-0014.
• Rossbacher, L.A., and Rhodes, D.D., 2004, Building geology for the future: cui bono?: Geotimes, v. 49, no. 9, p. 26-29.
• Rhodes, D.D., Negrini, R., Arrowsmith, JR., and Noriega, G., 2005, New evidence for the age and extent of lake deposits and the role of tectonic warping in late Pleistocene drainage reorganization, Carrizo Plain: Geological Society of America Abstracts with Programs, v. 37, p. 255.
• Rhodes, D.D., 2005, A 1% solution: establishing and reaching enrollment goals in geoscience departments: EOS Transactions of the American Geophysical Union, v. 86, Fall Meeting Supplement, Abstract ED12A-07.
• Rhodes, D.D., 2006, Finding value: the key to successful geoscience programs: Geological Society of America Abstracts with Programs, v. 38, p. 556.
• Rhodes, D.D., 2006, A demographic analysis of American Geophysical Union membership with implications for change: EOS Transactions of the American Geophysical Union, v. 86, Fall Meeting Supplement, Abstract ED33A-1382.
• Rhodes, D.D., 2007, Demography of geologists and geology programs in the Southeastern Section of the Geological Society of America: Geological Society of America Abstracts with Programs, v. 39, no. 2, p. 76.
• Negrini, R., Rhodes, D.D., Stephenson, R., Noriega, G., Grant, L., Baron, D., Wigand, P.E., and Rich, F.J., 2007, Evidence for a long-lived Pleistocene lake, Carrizo Plain, California: Geological Society of America Abstracts with Programs, v. 39, p.

Academic Schedule 2007-2008

Fall Semester

• GEOG 3741 Remote Sensing

Spring Semester

To Contact Me

E-Mail: DRhodes@GeorgiaSouthern.edu
Telephone:  (912) 478-5361 
FAX:  (912) 478-0668

Mailing Address:  Department of Geology and Geography
                  Georgia Southern University
                  Statesboro, Georgia 30460

Places to Surf

• Active Tectonics
• USGS Earthquake Information
• Geology Links
• Geological Society of America
• Colleges and Universities