Quaternary extensional growth folding beneath Reno, Nevada, imaged by urban seismic profiling
Bulletin of the Seismological Society of America
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Abstract
We characterize shallow subsurface faulting and basin structure along a transect through heavily urbanized Reno, Nevada, with high‐resolution seismic reflection imaging. The 6.8 km of P‐wave data image the subsurface to approximately 800 m depth and delineate two subbasins and basin uplift that are consistent with structure previously inferred from gravity modeling in this region of the northern Walker Lane. We interpret two primary faults that bound the uplift and deform Quaternary deposits. The dip of Quaternary and Tertiary strata in the western subbasin increases with greater depth to the east, suggesting recurrent fault motion across the westernmost of these faults. Deformation in the Quaternary section of the western subbasin is likely evidence of extensional growth folding at the edge of the Truckee River through Reno. This deformation is north of, and on trend with, previously mapped Quaternary fault strands of the Mt. Rose fault zone. In addition to corroborating the existence of previously inferred intrabasin structure, these data provide evidence for an active extensional Quaternary fault at a previously unknown location within the Truckee Meadows basin that furthers our understanding of both the seismotectonic framework and earthquake hazards in this urbanized region.
Suggested Citation
Stephenson, W.J., Frary, R.N., Louie, J., Odum, J., 2013, Quaternary extensional growth folding beneath Reno, Nevada, imaged by urban seismic profiling: Bulletin of the Seismological Society of America, v. 103, no. 5, p. 2921-2927, https://doi.org/10.1785/0120120311.
ISSN: 1943-3573 (online)
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Quaternary extensional growth folding beneath Reno, Nevada, imaged by urban seismic profiling |
| Series title | Bulletin of the Seismological Society of America |
| DOI | 10.1785/0120120311 |
| Volume | 103 |
| Issue | 5 |
| Publication Date | September 30, 2013 |
| Year Published | 2013 |
| Language | English |
| Publisher | Seismological Society of America |
| Contributing office(s) | Geologic Hazards Science Center |
| Description | 7 p. |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Bulletin of the Seismological Society of America |
| First page | 2921 |
| Last page | 2927 |
| Country | United States |
| State | Nevada |
| City | Reno |