Field-trip guide to subaqueous volcaniclastic facies in the Ancestral Cascades arc in southern Washington State—The Ohanapecosh Formation and Wildcat Creek beds
Links
- Document: Report (11.6 MB pdf)
- Larger Work: This publication is Chapter B of Field-trip guides to selected volcanoes and volcanic landscapes of the western United States
- Download citation as: RIS | Dublin Core
Abstract
Partly situated in the idyllic Mount Rainier National Park, this field trip visits exceptional examples of Oligocene subaqueous volcaniclastic successions in continental basins adjacent to the Ancestral Cascades arc. The >800-m-thick Ohanapecosh Formation (32–26 Ma) and the >300-m-thick Wildcat Creek (27 Ma) beds record similar sedimentation processes from various volcanic sources. Both show evidence of below-wave-base deposition, and voluminous accumulation of volcaniclastic facies from subaqueous density currents and suspension settling. Eruption-fed facies include deposits from pyroclastic flows that crossed the shoreline, from tephra fallout over water, and from probable Surtseyan eruptions, whereas re-sedimented facies comprise subaqueous density currents and debris flow deposits.
Suggested Citation
Jutzeler, M., and McPhie, J., 2017, Field-trip guide to subaqueous volcaniclastic facies in the Ancestral Cascades arc in southern Washington State—The Ohanapecosh Formation and Wildcat Creek beds: U.S. Geological Survey Scientific Investigations Report 2017–5022–B, 24 p., https://doi.org/10.3133/sir20175022B.
ISSN: 2328-0328 (online)
Study Area
Table of Contents
- Abstract
- Introduction
- Geologic Setting
- Field-Trip Stops
- References
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Field-trip guide to subaqueous volcaniclastic facies in the Ancestral Cascades arc in southern Washington State—The Ohanapecosh Formation and Wildcat Creek beds |
| Series title | Scientific Investigations Report |
| Series number | 2017-5022 |
| Chapter | B |
| DOI | 10.3133/sir20175022B |
| Year Published | 2017 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Contributing office(s) | Volcano Science Center |
| Description | vii, 24 p. |
| Country | United States |
| State | Washington |
| Other Geospatial | Ancestral Cascades Arc, Ohanapecosh Formation, Wildcat Creek Beds |
| Online Only (Y/N) | Y |
| Google Analytic Metrics | Metrics page |