[ghsc-seminars] In 30 minutes (10am): Jessie Thompson Jobe, USGS, Cryptic Landscapes

[Mirus, Benjamin]

*Cryptic Landscapes: *
*Using Tectonic Geomorphology to Assess Low-rate, Distributed Deformation*

*Jessie Thompson Jobe*
*U.S. Geological Survey *

Faults can be hard to find and characterize for seismic hazard analysis.
Landscape-scale tectonic geomorphology identifies areas of tectonic
activity when deformation may be blind, low-rate, or distributed. I will
highlight two case studies that rely on landscape-scale quantitative
tectonic geomorphology to assess deformation in the Pit River region of
northeastern California and the New Madrid Seismic Zone (NMSZ), Arkansas.
Both regions have landforms that are hypothesized to be fault-controlled,
but currently lack quantitative evidence to demonstrate recent tectonic
activity. Our results demonstrate that digital topographic analysis on 10m
NED DEMs can tease out signs of active tectonics that might help improve
hazard models. In the NMSZ, variations in catchment metrics illustrate
differences in tectonic activity along Crowley’s Ridge, supported by
seismic data and the presence of late Pleistocene deformed surfaces
identified in lidar data. In NE California, the analysis is complicated by
highly variable lithology across the landscape.

*Tuesday, November 27th**, 2018*
*10-11a*
*m*
*  (Mountain Time)*
*USGS, 1711 Illinois Street, Golden, CO*
*Entry Level Seminar Room (204)*

*Note: Please arrive *~5 minutes early* and *bring photo ID* for
airport-style security measures now in place at the USGS building.

Thank you,
GHSC Seminar Committee

Ben
Mirus - bbmirus at usgs.gov
Josh Rigler - erigler at usgs.gov
Oliver Boyd - olboyd at usgs.gov <oboyd at usgs.gov>
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