| Identifier | 2017-686-FA | ||||||||
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| Purpose | Geophysical investigations of shallow sediment cover on the shelf in support of sand resource quantification | ||||||||
| Location | Shelf NW of Oceanside, CA | ||||||||
| Summary | chirp, magLog, POS, seismic, Swath and YoNav added to FAD 7/27/2018 grainsize data on FAD 11/30/2017 | ||||||||
| Info derived | Sand distribution and thickness on shelf; grain size | ||||||||
| Comments | Funding OFA via BOEM IAA M16PG00030 | ||||||||
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| Vehicles | Dodge Caravan - G41-2395R
F350 G43-2783H
MarFac; Ford F350 pickup/stake truck; 6 pass; G82-0317H
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| Organization |
2885 Mission Street
Santa Cruz, CA95060
(831) 460-7401
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| Principal investigators | Jonathan Warrick | ||||||||||||||||||||
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| Data category: | Electro-Magnetic, Environmental Data, Location-Elevation, Sampling, Seismics, Sonar, Other |
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| Data type: | Magnetics, CTD, Navigation, Geology, Sub Bottom Profiler, Multibeam, Sound Velocity |
| Equipment | Usage description | Data types | Datasets |
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| Van Veen | Biology, Geology | 1 | |
| 512 chirp | Sub Bottom Profiler | 1 | |
| Magnetometer | Magnetics | 1 | |
| POS MV | Navigation | (no data reported) | |
| Vibracore | Geology | (no data reported) | |
| YoNav | Navigation | (no data reported) | |
| Swath | Multibeam | (no data reported) | |
| CTD - FSI | CTD, Mooring (physical oceanography) | (no data reported) | |
| 512 chirp-source | Sub Bottom Profiler | (no data reported) | |
| Reson 7111 | Multibeam | (no data reported) | |
| Sound Velocity - SVP-1 | Sound Velocity | (no data reported) |
| Dataset name | Equipment | Description | Dataset contact |
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| Sediment grain size data from samples collected offshore Oceanside, southern California | Van Veen | This section of the data release contains grain-size analysis of twenty-six seafloor surface grab samples that were collected aboard the R/V Snavely in 2017 on U.S. Geological Survey cruise 2017-686-FA offshore Oceanside, southern California. The samples were collected at strategic locations along the same transects as seismic-reflection lines oriented to assess sand and gravel resources in Federal and State waters for potential use in future beach nourishment projects along stretches of the coast where critical erosion hotspots have been identified. Samples were collected at 23 locations using a Van Veen sediment sampler along 4 shore-perpendicular transects spaced 5 to 9 km apart, aligned with previously collected seismic profile lines, at depths ranging from about 20 to 80 m. One sample on the outer shelf (BSS-06) was collected to evaluate an area of suspected sand occurrence. Two duplicate samples were collected at one location (BSS-08) in order to evaluate local sample variability. | Thomas D Lorenson |
| High-resolution chirp seismic-reflection data | 512 chirp | This section of the data release contains approximately 369 line-kilometers of processed, high-resolution chirp seismic-reflection profiles that were collected aboard the R/V Snavely in 2017 on U.S. Geological Survey cruise 2017-686-FA offshore Oceanside, southern California. The along-shore and across-shore chirp profiles are oriented to assess sand and gravel resources in Federal and State waters for potential use in future beach nourishment projects along stretches of the coast where critical erosion hotspots have been identified. The chirp profiles were acquired using an Edgetech 512 Chirp sub-bottom profiling system. | Ray W Sliter |
| Marine magnetic data | Magnetometer | This part of the data release contains marine magnetic data that were collected aboard the R/V Snavely in 2017 on U.S. Geological Survey cruise 2017-686-FA offshore Oceanside, southern California. The magnetic field data were collected to characterize the surface and subsurface properties of the study area, including unconsolidated sediment thickness and subsurface sediment horizons. | Janet Tilden Watt |
