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Metadata
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ID
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96030
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Also Known As
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96030
WCMAW-1-96-NC
W-1-96-NC
WCMAW-1-96-NC
Strataform
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Abstract
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United States Geological Survey, Menlo Park, California.
Chief Scientists: Mike Field, Jim Gardner. Geophysical data
(Huntec, SIS1000) of field activity 96030 (W-1-96-NC) in
Eureka, CA shelf and slope from 06/29/1996 to 07/07/1996
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Organization
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United States Geological Survey, Menlo Park, California
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Project/Theme
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Strata Formations on Margins (Strataform)
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National Plan
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Strataform (ofa)
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Chief Scientist
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Mike Field
Jim Gardner
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Activity Type
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Geophysical
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Platform
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Wecoma
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Area of Operation
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Eureka, CA shelf and slope
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Location map
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Bounding Coordinates
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41.31778
-124.77558 -124.17098
40.55345
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Ports
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leave Eureka, CA
arrive Eureka, CA
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Dates
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06/29/1996 (JD 181) to 07/07/1996 (JD 189)
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Analog Materials
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list
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Index map
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Crew
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Mike Field
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Chief Scientist, USGS Western Region
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Jim Gardner
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Co-chief Scientist, USGS Western Region
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John Gann
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Elec. Tech, USGS Western Region
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Tom O'Brien
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Elec. Tech, USGS Woods Hole
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Pete Dartnell
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Watchstander, USGS Western Region
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Ian Wallace
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Watchstander, USGS Western Region
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Stuart Sides
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Watchstander, USGS Western Region
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Graham Dundee
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Elec Tech, Geoforce
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Equipment Used
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Purpose
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Image upper 50m of sediment to determine architecture of depositional units.
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Information to be Derived
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Cross sections, fence diagrams, isopach maps (see Pete Dartnell, Project Information Coordinator)
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Summary
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Isopachs of various sediment units
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Notes
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Associated cruises:
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W-2-95-NC
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W-1-96-NC
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For raw and intermediate data sets, contact
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Rani Nandiwada
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From Western Region Marine and Coastal Surveys Bulletin, July 12,
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1996...
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SUCCESS ON THE HIGH SEAS OFF EUREKA
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This week we completed a very successful 9-day survey aboard the RV WECOMA of
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the shelf and slope offshore of Eureka in the area designated as the STRATAFORM
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area. One of the major goals of the STRATAFORM Project is to gain a better
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understanding of how strata are deposited, both in terms of the physical
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processes and also in terms of the preserved acoustic signatures, such as
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downlap, offlap, and toplap. A complementary goal is to learn how the signatures
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combine to form characteristic stratigraphic sequences, such as drapes, aprons,
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wedges, and sigmoids. An essential element to gain this understanding is the
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analysis and interpretation of geometries of acoustic reflectors in the upper 50
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m of the outer shelf and slope. The cruise aboard the WECOMA of Oregon State
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University was the second in 10 months devoted to these goals and resulted in
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over 1100 km of high-resolution seismic-reflection data using the Huntec DTS and
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high-resolution sidescan sonar using the Datasonics SIS-1000 system.
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Thanks to an excellent support team from Marfac, and at-sea support
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extraodinaire from our John Gann and Tom O'Brien from Woods Hole, we achieved
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all of our objectives, despite some LARGE waves and ubiquitous crab pots. The
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results are outstanding from our viewpoint, and they should provide lots of new
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insights for understanding the late Quaternary development of the shelf and
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slope, particularly with regard to channel flows on slopes, the Humboldt
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submarine slide, and tectonic deformation of late Quaternary deposits.
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The data are being processed and archived at present. If you are interested
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in more information, our cruise report, tracklines, and a few images are
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available on the web at our marine facility page
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---http://marfac044.wr.usgs.gov. Look for it to appear in our WUSGS site on
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walrus in the very near future. Mike Field amd Jim Gardner
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Publications
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Cruise Report exists at Woods Hole
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Mayer, Larry, Fonseca, Luciano, Pacheco, Miguel, Galway, Sean, Vicente Martinez,
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Jose, Hou, Tianhang, Orange, Dan, Gulick, Sean, Yun, Janet, Gardner, James V.,
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Dartnell, Pete, Lee, Homa, and Cutter, Randy, 200?, The STRATAFORM GIS:
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University of New Brunswick, Office of Naval Research.
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Got Help?
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For 96030, we would appreciate any information on -- contract, days at sea, dive count, funding, information specialist, kms of navigation, NGDC Info, owner, project number, scanned materials, seismic description, station count, station description, submersible, tabulated info.
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