Field Activity 2019-668-FA

Identifier 2019-668-FA
Also known as ERO inter-deployment sampling
Purpose Determine temporal variability in bed sediment erodibility and investigate its causes
Location northern San Francisco Bay
Summary Successfully collected sediment cores and location data.
Info derived Bed sediment grains size, bulk density, and carbon content.
Comments Entries for this field activity are based on entries from Field Activity 2019-625-FA
Parke Snavely
MarFac; crewcab - G63-2147R
Start Vallejo, CA 2019-11-25
End Vallejo, CA 2019-11-26
Days in the field 1
West -122.55523682
East -121.86584473
North 38.17127344
South 37.96368875


2885 Mission Street
Santa Cruz, CA95060
(831) 460-7401
Principal investigators Jessica R Lacy
Crew members
Andrew Stevens
Scientist, Staff
Peter Dal Ferro
Scientist, Staff
Information specialist(s)
Jessica R Lacy
Specialist, Information
McGill, Samantha
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)
Gomex Core Geology 1
GPS Navigation (no data reported)


Datasets compiled from multiple sources

Dataset name Equipment Description Dataset contact
Grain size, bulk density, and organic carbon of sediment cores from San Pablo Bay and Grizzly Bay, California, 2019 Gomex Core Bed sediment samples were collected in San Pablo Bay and Grizzly Bays on eight days from June through November 2019, to analyze for sediment properties including bulk density, particle size distribution, and percent organic carbon. Sediment samples were collected from a small vessel near pre-established USGS instrument moorings using a Gomex box corer that was subsampled with three push cores (37 mm in diameter) per Gomex core. Six subsamples were collected from the top 5 centimeters (cm) of each push core, a few push cores included the top 8 cm. The top two subsamples were each 0.5 cm thick, and all following subsamples were each 1 cm thick. Push core samples from the first, third, and fifth centimeter depth were analyzed for grain size and percent organic carbon, while all 6 sections were analyzed for bulk density. Data are provided in a comma-delimited values spreadsheet. These data were collected as part of a collaborative project with the USGS California Water Science Center and the USGS Water Mission Area on physical and biological controls on sediment erodibility, funded by the USGS Priority Ecosystems Program for San Francisco Bay and Delta and the USGS Coastal Marine Hazards and Resources Program. Lukas T Winkler Prins


Samples collected during this field activity