Field Activity 2017-643-FA

Identifier 2017-643-FA
Alternate names Salmon River
Purpose To map out, sample, and date tsunami deposits and subsidence events from past Cascadia earthquakes.
Location Salmon River, OR
Summary Collected 38 sediment samples for grain size analysis, radiocarbon dating, and OSL dating. Shallow stratigraphy of 106 cores was described.
Info derived deposit thickness, grain size, ct scans, radiocarbon ages
Projects
Platform
Canoe
Itinerary
Start Lincoln City, OR 2017-07-13
End Lincoln City, OR 2017-07-19
Days in the field 5
Bounds
West -124.0215683
East -123.92674325
North 45.05857742
South 45.00185887

Personnel

Organization
2885 Mission Street
Santa Cruz, CA95060
(831) 460-7401
Principal investigators SeanPaul M La Selle
Crew members
Information specialist(s)
SeanPaul M La Selle
Specialist, Information

Data types and categories

Data category: Imagery, Location-Elevation, Sampling
Data type: Photo, Navigation, Geology

Equipment used

Equipment Usage description Data types Datasets
camera Photo (no data reported)
Handheld GPS Navigation (no data reported)
Hand-grab sample Biology, Chemistry, Geology (no data reported)
Push corer Surveys (geochemical), Surveys (biological), Biology, Geology 3

Datasets


Datasets compiled from multiple sources

Dataset name Equipment Description Dataset contact
Thickness distribution of the most recent sandy tsunami deposit in the Salmon River estuary, Oregon Push corer This portion of the data release provides the spatial thickness distribution of sandy deposits inferred to have been deposited at the Salmon River, OR by a circa 1700 CE tsunami. Data were collected by describing hand-operated gouge cores at 129 sites in 2017 and 2018, and supplemented by 114 core descriptions from 1987 (Nelson and others, 2004). SeanPaul M La Selle
Sediment grain-size distributions from cores collected in the Salmon River estuary, Oregon Push corer This portion of the data release presents sediment grain-size data from cores and surface samples collected from the Salmon River estuary in 2017 and 2018. In total, 60 samples were collected from 18 sites containing sandy sediment from the circa 1700 CE tsunami deposit, two sites with post-1700 CE silt, and eight modern surface sample sites. The grain-size distributions of samples were determined using standard techniques developed by the USGS Pacific Coastal and Marine Science Center sediment lab. SeanPaul M La Selle
Hydrodynamic and sediment transport tsunami models at the Salmon River estuary, Oregon Push corer This portion of the USGS data release describes the Delft3D-FLOW model application for propagating simulated tsunamis from 15 hypothetical earthquake sources of the Cascadia Subduction Zone through a series of nested grids to modeling tsunami sediment transport in the Salmon River estuary, OR. Input files necessary to run the Delft3D-FLOW model are provided. SeanPaul M La Selle

Publications

Samples collected during this field activity