Quantifying fault-zone activity in arid environments with high-resolution topography

Details Quantifying fault-zone activity in arid environments with high-resolution topography Quantifying fault-zone activity in arid environments with high-resolution topography

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3423s05o&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 23, CiteID L23S05

Physics

3

Structural Geology: Continental Neotectonics (8107), Hydrology: Geomorphology: General (1625), Geochronology: Cosmogenic-Nuclide Exposure Dating (4918)

Scientific paper

High-resolution airborne laser swath-mapping (ALSM) topography illuminates active faulting with unprecedented clarity. We contrast ALSM topography of two dextral faults in arid regions of California with slip rates that differ by an order of magnitude: The Lenwood fault, with rate of ~1 mm/yr, and the Clark fault, a strand of the San Jacinto fault with net slip rate >10 mm/yr. Visualization of ALSM data reveals abundant fault scarps and deflected channels that when reconstructed can yield powerful slip constraints. Though many of these features may also be detected in existing aerial photography, these data are limited by stereo depth resolution and fixed illumination angle.

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