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USGS Coastal and Marine Geology Program

Field Activity Details for field activity 2019-619-FA

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AKA: none

Other ID: 2019-001-FA

Status: Completed

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

Funding Program(s): Gas Hydrates (MU113)

Principal Investigator(s): Nancy Prouty

Affiliate Investigator(s): Nancy Prouty (PCMSC); Amanda Demopoulos (WARC, Gainesville); Carolyn Ruppel (WH); Tamara Baumberger (PMEL-NOAA); Jens Greubert (GEOMAR), Howard Mendlovitz (UNC)

Information Specialist(s): Other

Data Type(s): Environmental Data: CTD, Location-Elevation: Navigation, Sonar: Multibeam, Sonar: Single Beam

Scientific Purpose/Goals: ROV and geophysical studies of methane seepage on the Cascadia margin


Start Port/Location: San Francisco, CA

End Port/Location: Astoria, OR

Start Date: 2019-06-12

End Date: 2019-07-02

Equipment Used: CTD - FSI, GPS, Other

Information to be Derived: seafloor maps, methane flux, methane oxidation rate, chemosynthetic habitats

Summary of Activity and Data Gathered: location of seeps (EK60), seafloor maps (MB), gas composition, age and geochemistry of carbonates, and chemosynthetic food web composition

Staff: Nancy Prouty

Affiliate Staff:

Notes: Entries for this field activity are based on entries from Field Activity 2019-001-FA
Project: USGS GAS HYDRATES (LQ000FP). This was a competitively chosen project for which Schmidt Ocean Institute is providing about $1 million in shiptime on the global class R/V Falkor. We are responsible for travel, shipping, other science, overtime, etc.


U.S. Cascadia (Pacific Northwest) margin, offshore Washington and Oregon

North: 48.21672332 South: 41.85895216 West: -127.24854111 East: -124.58936142




Prouty, N.G., 2023, Geochemistry of authigenic carbonates from Cascadia Margin: U.S. Geological Survey data release,


Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
Mooring (physical oceanography)
GPS --- Navigation
Other --- --- ---

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