Developing landslide chronologies using landslide-dammed lakes in the Oregon Coast Range
Geological Society of America Field Guides
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Abstract
The Oregon Coast Range is a dynamic landscape that is continually shaped by shallow and deep-seated landslides that can have disastrous consequences to infrastructure and human lives. Searching for evidence of potentially coseismic mass wasting is incredibly difficult, particularly when historical observations are limited. Landslide-dammed lakes with submerged “ghost forests” in the Oregon Coast Range present the unique opportunity to establish landslide chronologies with subannual accuracy when dendrochronology is applied. This field guide will visit the unique landslide-dammed Klickitat Lake and explore a drowned ‘ghost forest’ to discuss methods used to establish a prehistoric landslide chronology in western Oregon, USA. After exploring the lake and exposing its geomorphic secrets, the guide will end with a stop on Marys Peak, a mafic volcanic intrusion composed of gabbroic dikes and pillow basalt that forms the highest point in the Oregon Coast Range. With the landscape of western Oregon laid out before us, we will discuss short- and long-term geomorphic evolution of the Oregon Coast Range and Willamette Valley.
Suggested Citation
Wetherell, L., Struble, W., LaHusen, S.R., 2022, Developing landslide chronologies using landslide-dammed lakes in the Oregon Coast Range, chap. 1 of GSA field guide: From terranes to terrains: Geologic field guides on the construction and destruction of the Pacific Northwest: Geological Society of America Field Guides, v. 62, p. 1-18, https://doi.org/10.1130/2021.0062(01).
Study Area
| Publication type | Book chapter |
|---|---|
| Publication Subtype | Book Chapter |
| Title | Developing landslide chronologies using landslide-dammed lakes in the Oregon Coast Range |
| Series title | Geological Society of America Field Guides |
| Chapter | 1 |
| DOI | 10.1130/2021.0062(01) |
| Volume | 62 |
| Year Published | 2022 |
| Language | English |
| Publisher | Geological Society of America |
| Contributing office(s) | Geology, Minerals, Energy, and Geophysics Science Center |
| Description | 18 p. |
| Larger Work Type | Book |
| Larger Work Subtype | Monograph |
| Larger Work Title | GSA field guide: From terranes to terrains: Geologic field guides on the construction and destruction of the Pacific Northwest |
| First page | 1 |
| Last page | 18 |
| Conference Title | GSA Connects 2021 |
| Conference Location | Portland, Oregon, United States |
| Conference Date | 2021 |
| Country | United States |
| State | Oregon |
| Other Geospatial | Coast Range |