Dr. Paul J. Umhoefer
Ph.D. University of Washington, 1989
My research is focused on Tectonics of
the Cenozoic Era. My main research interest is in the tectonic evolution of,
and processes that form, oblique plate boundaries. More specifically, I study
basins and related faults that form in these settings, and the processes and
evolution of areas with mixed strike-slip and dip-slip faulting. My research is
field and lab based and my students and I use the methods of structural
geology, stratigraphy, and related disciplines to understand tectonic problems.
P.J., Lizarralde, Holbrook, Gonz´alez-Fern´andez, Fletcher, Axen, 2012, Middle Miocene
to early Pliocene oblique extension in the southern Gulf of California: Geosphere,
v. 8, 752-770.
Alistair Harding, Antonio González-Fernández, W. Steven Holbrook, Graham Kent, Neal Driscoll, John Fletcher, Dan Lizarralde, Paul Umhoefer, and Gary Axen, 2012, Farallon slab detachment and
deformation of the Magdalena Shelf, southern Baja California: Geophysical Research Letters,
vol. 39, L09307, doi:10.1029/2011GL050828.
Dorsey, R.J., and Umhoefer, P.J., 2012,
Influence of sediment input and plate-motion obliquity on basin development
along an active oblique-divergent plate boundary: Gulf of California and Salton
of Sedimentary Basins: Recent Advances, First Edition. Edited by Cathy Busby
and Antonio Azor, Blackwell Publishing Ltd., p. 209 – 225.
Umhoefer, P.J., 2011, Why Did the Southern Gulf
of California Rupture So Rapidly? Oblique divergence across hot, weak
lithosphere along a tectonically active margin: GSA Today, v. 21, no. 11, p. 4-10, doi:
Fry, M.C, A.E.Springer, and P.J.
Umhoefer, 2011. Hydrogeologic implications of a fault scaling relationship in
bedrock aquifers, Environmental & Engineering Geoscience, Vol. XVII, No.
4, p. 377–389.
Busch Melanie M., J Ramon Arrowsmith; Paul J Umhoefer, Joshua A Coyan,
Sara Maloney, and Genaro
Martínez Gutiérrez, 2011, Geometry and evolution of rift-margin, normal-fault-bounded
basins from gravity and geology, La Paz - Los Cabos region, Baja California
Sur, Mexico; Lithosphere, doi:/L113.1.
Umhoefer, P.J., Beard, L.S. Martin, K.L. Blythe, N., 2010, From detachment to
faulting: A model for the
Mead extensional domain based on new ages and correlation of subbasins, in Umhoefer, Paul J., Lamb, Melissa A.,
Beard, L.S., eds., Miocene Tectonics of the Lake Mead region: Geological
Society of America Special Paper 463, p. 371-394.
M., K.L. Martin, T.
Umhoefer, L. Eaton, 2010,
Deposition and age of the lower Horse Spring Formation in the
area, in Umhoefer, Paul J., Lamb,
Melissa A., Beard, L.S., eds., Miocene Tectonics of the Lake Mead region:
Geological Society of America Special Paper 463.
Blythe, N. Umhoefer, P.J., Duedendorfer, E.M. and Beard,
Development of Salt Spring Wash basin in the hanging wall of the White Hills
detachment fault, Lake Mead domain, in Umhoefer, Paul J., Lamb, Melissa A., Beard,
L.S., eds., Miocene Tectonics of the Lake Mead region: Geological Society of
America Special Paper 463.
Umhoefer, P.J., Duedendorfer, E.M., Blythe,
N. and Swaney, Z., 2010, Development of Gregg basin and the western side of the
southern Grand Wash
trough during late
stage faulting in
eastern Lake Mead: A relay ramp in a normal fault system in
wall of the
Grand Wash fault, in Umhoefer, Paul J., Lamb, Melissa A., Beard, L.S., eds., Miocene
Tectonics of the Lake Mead region: Geological Society of America Special Paper
Whitney, Donna L.,
Umhoefer, Paul J., Teyssier, Christian, and Fayon, Annia K., 2008, Yo-yo tectonics of the Nigde Massif during
wrenching in central Anatolia: Turkish Journal of Earth
Sciences, v. 17, 209-217.
Páramo, P., W. S. Holbrook,
H. E. Brown, D. Lizarralde, J. Fletcher, P. Umhoefer, G. Kent, A. Harding, A.
Gonzalez, and G. Axen, 2008, Seismic structure of the southern Gulf of
California from Los Cabos block to the East Pacific Rise, J. Geophys. Res.,
113, B03307, doi:10.1029/2007JB005113.
Note: italics are Northern Arizona University graduate students