USGS - science for a changing world

USGS Coastal and Marine Geology Program

Field Activity Details for field activity 2010-077-FA

Other ID: R/V Endeavor cruise 486 (EN486)

Status: Completed

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

Funding Program(s):

Principal Investigator(s): Bradford Butman

Affiliate Investigator(s): Bruce Keafer (Chief Scientist), Woods Hole Oceanographic Institution; Don Anderson (PI), Woods Hole Oceanographic Institution

Information Specialist(s): Bradford Butman

Data Type(s): Environmental Data: CTD, Environmental Data: Current, Geochemical: Experiments, Imagery: Photo, Location-Elevation: Navigation, Sampling: Geology

Scientific Purpose/Goals: Measure erodability of surficial sediments using Gust Erosion Microcosm System (GEMS), obtain conductivity-temperture-depth profiles (CTD), obtain samples of surficial sediments for texture analysis.


Start Port/Location: Narragansett, RI

End Port/Location: Narragansett, RI

Start Date: 2010-10-13

End Date: 2010-10-23

Equipment Used: GPS (wh), Corer - piston, SBE 9 CTD, Gust Erosion Microcosm System (GEMS), Digital camera, ADCP, Craib corer

Information to be Derived:

Summary of Activity and Data Gathered: The principal objective of this cruise (led by scientists at the Woods Hole Oceanographic Instituion (WHOI)) was to obtain samples of the surficial sediments using a Craib corer at approximately 110 stations in the Gulf of Maine for analysis of Alexandrium cyst concentration. This fall 2010 distribution of cysts will be used as input to numerical models for forecasting Alexandrium blooms in the spring of 2011. USGS participation was to measure sediment erodability (using a GEMS system) on cores collected using the USGS slow corer at 5-10 stations as time permitted. Samples of the surficial sediment for texture analysis by USGS were obtained from the sediment samples collected by WHOI for cyst analysis and water-column profiles from a USGS CTD attached to the Craib corer were obtained for analysis of the suspended sediment distribution. Data gathered include: ~150 CTD casts; ~100 surficial sediment samples for texture analysis; erodability measurements at 6 stations (two cores each station) using GEMS.

Staff: Jonathan Borden, Patrick Dickhudt

Affiliate Staff:
Bruce Keafer
Chief Scientist (WHOI); WHOI personnel (12 total)

Notes: Sampling the sediments for the cyst concentration was the primary objective of this cruise. Sampling was suspended and/or steaming slowed for about two days (~10/15 and 10/21) of the cruise due to high seas. Coring for erosion analysis was successfully carried out at six stations along the Massachusetts-New Hampshire-Maine-Canadian coast; however, due to time constraints cores were not obtained in Jordan or Wilkenson Basin. This was the first time the GEMS system was used by USGS at sea.


Gulf of Maine, United States, North America, North Atlantic,

North: 45.01142 South: 42.37478 West: -70.9937 East: -66.35742


photo of Endeavor


Butman, B., Aretxabaleta, A., Dickhudt, P., Dalyander, P.S., Sherwood, C.R., Anderson, D.M., Keafer, B.A., and Signell, R.A., 2013, Investigating the importance of sediment resuspension in Alexandrium fundyense cyst population dynamics in the Gulf of Maine: Deep Sea Research II, , doi: 10.1016/j.dsr2.2013.10.011.


Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
ADCP --- Current
Gust Erosion Microcosm System (GEMS) --- Experiments
Digital camera --- Photo
GPS (wh) --- Navigation
Craib corer --- Geology
Corer - piston --- Geology

Accessibility FOIA Privacy Policies and Notices

U.S. Department of the Interior | U.S. Geological Survey
Questions or Comments? Contact CMGDS Team