| Identifier | 2018-625-FA | ||||||||
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| Purpose | To map out, sample, and date tsunami deposits and subsidence events from past Cascadia earthquakes. | ||||||||
| Location | Salmon River and Cannon Beach, OR | ||||||||
| Summary | Cored at 39 locations, collected 27 samples for grain size, two 50 cm gouge cores for CT scanning and OSL dating. | ||||||||
| Info derived | deposit thickness, grain size, ct scans, radiocarbon ages | ||||||||
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| Vehicles | MarFac; Expedition G62-3094P |
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| Bounds |
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| Organization |
2885 Mission Street
Santa Cruz, CA95060
(831) 460-7401
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| Principal investigators | SeanPaul M La Selle | ||
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| Information specialist(s) |
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| Affiliate principal | Alan Nelson (USGS) |
| Data category: | Imagery, Location-Elevation, Sampling |
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| Data type: | Photo, Navigation, Geology |
| 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 |
| 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 |
