Field Observations and Logs from the Rose Hip Trench Exposure Across a North-facing Scarp Within the Seattle Fault Zone, Southern Bainbridge Island, Washington
Scientific Investigations Map
3520
Links
- Document: Pamphlet (6 MB pdf)
- Sheet: Sheet (25 MB pdf)
- Data Release: USGS Data Release - Radiocarbon, field measurements, and ground-based magnetic transect data supporting the study of north-facing scarps along the Seattle fault zone in Washington
- Download citation as: RIS | Dublin Core
Abstract
The Seattle Fault Zone is an approximately 70-km-long, east-west-trending zone of south-dipping blind reverse faults within the Puget lowland region in Washington. Because of the proximity, the Seattle Fault Zone poses a significant earthquake hazard to the Puget sound and Seattle metropolitan regions. We present preliminary mapping and trench-site information from a paleoseismic investigation across a newly identified active fault scarp located within the hanging wall of the Seattle Fault Zone on southern Bainbridge Island, Washington. The trench exposed monoclinally folded Miocene bedrock, fractured and faulted glacial-related deposits, and laminated lacustrine deposits capped by slope-derived colluvium. The observations from this investigation record late Pleistocene to Holocene north-vergent folding and faulting along this new fault scarp.
Suggested Citation
Angster, S.J., Sherrod, B.L., Johns, W., and Pearl J., 2024, Field observations and logs from the Rose Hip trench exposure across a north-facing scarp within the Seattle Fault Zone, southern Bainbridge Island, Washington: U.S. Geological Survey Scientific Investigations Map 3520, pamphlet 6 p., https://doi.org/10.3133/sim3520.
ISSN: 2329-132X (online)
ISSN: 2329-1311 (print)
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Field observations and logs from the Rose Hip trench exposure across a north-facing scarp within the Seattle Fault Zone, southern Bainbridge Island, Washington |
| Series title | Scientific Investigations Map |
| Series number | 3520 |
| DOI | 10.3133/sim3520 |
| Publication Date | June 11, 2024 |
| Year Published | 2024 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Contributing office(s) | Earthquake Science Center |
| Description | Pamphlet: iv, 6 p.; 1 Sheet: 49.74 × 34.26 inches |
| Country | United States |
| State | Washington |
| Other Geospatial | Bainbridge Island |
| Online Only (Y/N) | N |