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Darrel
S. Cowan |
Research Group: Current Research: I am also a co-PI on a collaborative
project, funded by a five-year grant from the Continental Dynamics Program at
NSF, called RETREAT: an
interdisciplinary study of syn-convergence extension in the northern Apennines
in Italy. With UW graduate students Gabriele Casale and Andrew Gendaszek and
colleagues at the University of Arizona, we are broadening our research to
address the Neogene to present-day history of subduction of the Adria
microplate beneath Croatia (ADVANCE).
The UW component focuses on the structural geology and the evolution of karst
in the Dinaride orogenic wedge. In earlier research projects, several
graduate students and UW colleagues and I investigated how diverse rock units
and terranes in the northwest Cordillera were accreted and displaced in
Cretaceous to early Tertiary time. Our findings bear on the current controversy
about Baja
British Columbia (pdf). Selected
Publications: Cowan, D.S., 1999, Do faults preserve a
record of seismic slip? A field geologist's opinion: Journal of Structural
Geology Twentieth Anniversary Issue, v. 21, p. 995-1001. Cowan, D.S., and Pini, G.A., 2001, Disrupted
and chaotic rock units, in Vai, G.B., and Martini, I.P., eds., Anatomy of an
Orogen-The Apennines and Adjacent Mediterranean Basins: Dordrecht, Kluwer
Academic Publishers, p. 165-176. Hayman, N. W., Knott, J.R., Cowan, D.S.,
Nemser, E., and Sarna-Wojcicki, A.M., 2003, Quaternary low-angle slip on
detachment faults in death valley, California: Geology, v. 31. Cowan, D.S., Cladouhos, T.T. and Morgan,
J.K., 2003, Structural geology and kinematic history of rocks formed along low-angle
normal faults, Death Valley, California: Geological Society of America
Bulletin, v. 155, p. 1230-1248. Cowan, D.S., 2003, Revisiting the
Baranof-Leech River hypothesis for early Tertiary coastwise transport of the
Chugach-Prince William terrane: Earth and Planetary Science Letters, v. 213, p.
463-475. Bennett, R.A., Hreinsdottir, S., Buble, G.,
Basic, T., Marjanovic, M., Casale, G., Gendaszek, A., and Cowan, D.S., 2008,
Eocene to present subduction of southern Adria mantle lithosphere beneath the
Dinarides: Geology, v.36, p. 3-6.
Structural
Geology, Tectonics and Geodynamics
My graduate students and I are currently
working on two general projects. In 1996, former post-doctoral associates
Trenton Cladouhos and Julia Morgan and I began a comprehensive field and
theoretical study of the kinematics and mechanisms of deformation in fault
rocks formed along low-angle normal faults in Death Valley, California. Eliza
Nemser is continuing our research on the origin and evolution of faults and
shear zones and associated damage in the brittle domain of the crust.
Cowan, D. S., Brandon, M.T., and Garver, J. I., 1997, Geologic tests of
hypotheses for large coastwise Displacements-A critique illustrated by the Baja
British Columbia controversy: American Journal of Science, v. 297, p. 117-173.
Gabriele Casale: Restorations of cross sections across the Dinarides, and determination of large-scale properties of the Dinaric orogenic wedge
Andrew Gendaszek: Quaternary to present kinematic history of the external Dinarides (Croatia) revealed through the geomorphic evolution of karst landforms
Eliza Nemser: Evolution of damage-zone deformation along small-displacement oblique-slip faults, Borrego Mountain, southern California
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