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USGS Coastal and Marine Geology Program

Field Activity Details for field activity 2019-642-FA

AKA: none

Other ID: CalDIG II

Status: Completed

Organization(s): USGS, Pacific Coastal and Marine Science Center

Funding Program(s): Marine Geomorphology, Evolution, and Habitats (ZP00FE6)

Principal Investigator(s): Guy Cochrane

Affiliate Investigator(s): Charles Paull (MBARI)

Information Specialist(s): Guy Cochrane

Data Type(s): Imagery: Video, Sampling: Geology, Location-Elevation: Navigation, Seismics: Sub Bottom Profiler

Scientific Purpose/Goals: Benthic habitat, structure, and sedimentary processes in support of offshore energy development.


Start Port/Location: San Diego, CA

End Port/Location: San Francisco, CA

Start Date: 2019-09-09

End Date: 2019-09-27

Equipment Used: GPS, 3.5khz, Remotely Operated Vehicle, pistoncore

Information to be Derived: Surficial geology, benthic habitat, grain size, sediment ages, pore water chemistry

Summary of Activity and Data Gathered: Piston and Gravity Coring. Coring was conducted for the most part during daylight hours at the request of the Ship’s Captain. The piston coring rail system was arranged on the fantail at a slight diagonal to allow a line and capstan to be rigged on the starboard deck to pull the corer along rails. Cores were collected on 12 of the 13 days at sea. A total of 41 cores were collected. The ROV dives were impacted more significantly by weather conditions that the coring operations. Objectives had to be achieved by modifying the original site plan. Of the original plan ten of the original sites were surveyed three of which were considered priority 1 sites out of 23 total dives. Video data are archived with MBARI.

Staff: Peter Dal Ferro, Daniel Powers, Maureen Walton

Affiliate Staff:

Notes: Numerous MBARI staff for coring and ROV.


South Central California

North: 35.84 South: 34.51 West: -122.02 East: -120.91


photo of Bold Horizon
Bold Horizon


Cochrane, G.R., Kuhnz, L.A., Dartnell, P., Gilbane, L., and Walton, M.A., 2022, Multibeam echosounder, video observation, and derived benthic habitat data offshore of south-central California in support of the Bureau of Ocean Energy Management Cal DIG I, offshore alternative energy project: U.S. Geological Survey data release,

Kennedy, D.J., Walton, M.A., Cochrane, G.R., Addison, J.A., Paull, C.K., Gwiazda, R., Lorenson, T.D., and Lundsten, E., 2021, Piston and gravity core data collected during USGS cruise 2019-642-FA offshore of south-central California in support of the Bureau of Ocean Energy Management (BOEM) California Deepwater Investigations and Groundtruthing (Cal DIG I) alternative energy project, September 2019: U.S. Geological Survey data release,


Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
GPS --- Navigation
3.5khz --- Sub Bottom Profiler
Remotely Operated Vehicle --- Photo
pistoncore --- Geology

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