Charles M. Shobe
University of Colorado Boulder
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Featured researches published by Charles M. Shobe.
Geology | 2018
Harrison J. Gray; Charles M. Shobe; Daniel E. J. Hobley; Gregory E. Tucker; Alison R. Duvall; Sarah Harbert; Lewis A. Owen
Quantifying off-fault deformation (OFD) rates on geomorphic timescales (10^2-10^5 yr) along strike-slip faults is critical for resolving discrepancies between geologic and geodetic slip-rate estimates, improving knowledge of seismic hazard, and understanding the influence of tectonic motion on landscapes. Quantifying OFD over these timescales is challenging without displacement markers such as offset terraces or geologic contacts. We present a landscape evolution model coupled with distributed lateral tectonic shear to show how drainage basins sheared by lateral tectonic motion can reveal OFD rates. The model shows that OFD rate can control the orientation of drainage basin topography: the faster the OFD rate, the greater the deflection of drainage basins towards a fault-parallel orientation. We apply the model to the southern San Andreas Fault near the Mecca Hills, where drainages basins change in orientation with proximity to the fault. Comparison of observed and modeled topography suggests that the OFD rate in the Mecca Hills follows an exponential-like spatial pattern with a maximum rate nearest the fault of 3.5 ± 1.5 mm/yr, which decays to approximately zero at ~600 m distance from the fault. This rate is applicable since the initiation of differential rock uplift in the Mecca Hills at approximately 760 ka. Our results suggest that OFD in this 800 m study area may be as high as 10% of total plate motion. This example demonstrates that curved drainage basins may be used to estimate OFD rates along strike slip faults.
Geophysical Research Letters | 2016
Charles M. Shobe; Gregory E. Tucker; Robert S. Anderson
Geoscientific Model Development | 2017
Charles M. Shobe; Gregory E. Tucker; Katherine R. Barnhart
Journal of Geophysical Research | 2018
Charles M. Shobe; Gregory E. Tucker; Matthew W. Rossi
Journal of Geophysical Research | 2018
Charles M. Shobe; Gregory E. Tucker; Matthew W. Rossi
Geoscientific Model Development Discussions | 2018
Katherine R. Barnhart; Rachel C. Glade; Charles M. Shobe; Gregory E. Tucker
GSA Annual Meeting in Seattle, Washington, USA - 2017 | 2017
Charles M. Shobe; Gregory E. Tucker; Katherine R. Barnhart
GSA Annual Meeting in Seattle, Washington, USA - 2017 | 2017
Charles M. Shobe; Gregory E. Tucker; Matthew W. Rossi
Geophysical Research Letters | 2016
Charles M. Shobe; Gregory E. Tucker; Robert S. Anderson
GSA Annual Meeting in Denver, Colorado, USA - 2016 | 2016
Taylor E. Schoenfeld; Charles M. Shobe; Gregory E. Tucker
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Cooperative Institute for Research in Environmental Sciences
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