The core of my research interests is the geologic study of active faults and related deformation, both as a means of recognizing potential seismic hazards and as a tool for understanding the processes of tectonic deformation of fault systems through time. Such study requires an integrated approach, employing techniques of structural geology, geomorphology, geophysics, and Quaternary stratigraphy.
Please contact me if you are interested in pursuing research in topics related to active tectonics, structural geology, and Quaternary geology at the University of Kentucky. Prospective students need to be self-motivated and scientifically curious, and potentially valuable skills include GIS and digital mapping, structural and 3D modeling experience, and backcountry/remote fieldwork experience.
***In particular, I am looking for a student to take on my ongoing paleoseismology project on the San Andreas fault and/or new paleoseismic investigations on the Denali fault. Both sites have a wealth of existing data and current/pending funding to support additional research.***
- The initiation and evolution of the Mount McKinley restraining bend of the Denali fault. (with co-PI Jeff Benowitz (UAF))
- Development of the paleoearthquake record for the southern San Andreas fault at Elizabeth Lake, California. (with co-PIs Kate Scharer (USGS) and James Dolan (USC))
- Use of Structure-from-Motion (SfM) for rapid construction of high-resolution 3D models for paleoseismic and structural geology studies (with Steve Micklethwaite (U. Western Australia)
- Characterization of the slip rate and paleoearthquake record for the Hines Creek fault at the Nenana River, Denali National Park, Alaska. (M.S. student Sara Federschmidt)
- Tectonic geomorphology and paleoearthquake record of the Denali fault at the Nenana River, Alaska. (M.S. student Laurel Walker and B.S. students Josh DeVore and Patrick Taylor)
- Latest Pleistocene/Holocene displacement of the Northern Foothills thrust and characterization of the near-surface fault geometry at the Nenana River, Alaska. (B.S. student Josh DeVore)
- Hillslope geomorphology of periglacial environments and the boreal forest. (M.S. student Laurel Walker)
For more details on these projects, please see the "Current Projects" link to the right
Projects in Development:
- Use of progressively-deformed geomorphic surfaces to constrain thrust fault kinematics and fault interactions within fold-thrust belts
- Application of isochron cosmogenic burial dating techniques to constraining ages of terraces in complex geomorphic environments and the nature and timing of regional aggradational events
- Temporal, spatial, and structural relationships between active normal faults and cinder cone emplacement in central Oregon.
The Japan Hills anticline uplifts and folds the former foreland basin surface at the northern margin of the Alaska Range. Mapping and surveying of fluvial terraces in this region led to the recognition of previously unknown faults with likely Holocene displacement and provided a means of interpreting the subsurface fault geometries for the active faults.
Paleoseismic trenching along the San Andreas fault (picture from Belle Philibosian's Coachella trench) is helping to define and refine earthquake chronologies along the southern San Andreas fault with the potential to test fault recurrence models and patterns of fault interaction in this complex fault system.
Bemis, S.P., Carver, G.A., and Koehler, R.D., Quaternary thrust system of the northern Alaska Range foothills: Geosphere, v. 8, n. 1, p. 196-205.
Carver, G.A., Bemis, S.P., Solie, D.N., Castonguay, S., and Obermiller, K.E., 2010, Active and potentially active faults in or near the Alaska Highway corridor, Dot Lake to Tetlin Junction, Alaska: Alaska Division of Geological & Geophysical Surveys Preliminary Interpretive Report 2010-1, 42 p.
Personius, S.F., Crone, A.J., Burns, P.A., Beget, J.E., Seitz, G.G., and Bemis, S.P., 2010, Logs and geologic data from a paleoseismic investigation of the Susitna Glacier fault, central Alaska Range, Alaska: U.S. Geological Survey Scientific Investigations Map 3114, 2 sheets. http://pubs.usgs.gov/sim/3114/.
Philibosian, B., Fumal, T.E., Weldon, R.J., Kendrick, K.J., Scharer, K.M., Bemis, S.P., Burgette, R.J., and Wisely, B.A., 2009, Photomosaics and Logs of Trenches on the San Andreas Fault near Coachella, California: U.S. Geological Survey, 2 sheets.
Carver, G.A., Bemis, S.P., Solie, D.N., and Obermiller, K.E., 2008, Active and potentially active faults in or near the Alaska Highway corridor, Delta Junction to Dot Lake, Alaska: Alaska Division of Geological & Geophysical Surveys Preliminary Interpretive Report 2008-3D, 32 p.
Bemis, S.P., and Wallace, W.K., 2007, Neotectonic framework of the north-central Alaska Range foothills, in Ridgway, K., Trop, J., Glen, J., and Fisher, M. eds., Tectonic Growth of a Collisional Continental Margin: Crustal Evolution of Southern Alaska, Geological Society of America Special Paper 431, p. 549-572.