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Metadata
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ID
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F-1-04-TB
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Abstract
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United States Geological Survey, Menlo Park, California.
Chief Scientists: John Chin, USGS Menlo Park, Roberto Anima,
USGS Menlo Park. Geophysical data (234khz, YoNav) of field
activity F-1-04-TB in Tomales Bay, CA from 11/15/2004 to
11/19/2004
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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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Tomales Bay, Habitat Mapping
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Chief Scientist
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John Chin
Roberto Anima
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Activity Type
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Geophysical
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Platform
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Frontier
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Area of Operation
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Tomales Bay, CA
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Location map
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Bounding Coordinates
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38.19268
-122.93189 -122.86112
38.10784
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Dates
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11/15/2004 (JD 320) to 11/19/2004 (JD 324)
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Analog Materials
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No analog holdings.
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Index map
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Information Specialist
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Crew
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John Chin
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USGS, Co Chief Scientist
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Roberto Anima
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USGS, Co Chief Scientist
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Andy Stevenson
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USGS, Information Specialist
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Ellen Phillips
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FACS Coordinator
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Mike Boyle
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USGS, Electronic Technician
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Larry Kooker
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USGS, Electronic Technician
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Gerry O'Brien
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USGS, Small boat handler
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Equipment Used
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Purpose
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Bathymetric, bay floor imaging.
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Conduct sonar surveys in Tomales Bay
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to establish bay and seafloor morphology.
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Establish a baseline of bay floor morphology
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which is essential in determining
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any future changes on the bay bathymetry
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in response to the watersheds that flow into the bay.
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Information to be Derived
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Swath bathymetry, bay floor backscatter image.
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Information from this study will be used to produce a habitat map.
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Notes
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Interferometric swath bathymetry
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[http://woodshole.er.usgs.gov/operations/sfmapping/swath.htm],
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brand SEA Model SWATHplus-M, media digital, code SUBX, 234 khz.
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Yonav GPS nav, media digital, comment WAAS DGPS correction.
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The Tomales Bay Watershed Council
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has voiced a need to begin looking
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at the environmental impacts of human input to the watersheds
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and feels it important to establish an ecological database
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that can be used to make comparisons in the future.
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Surveying would create a framework and this database.
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Tomales Bay marks the trace of the San Andreas Fault and
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is the culmination point of tributaries
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from the Inverness Ridge to the west and the watershed to the east.
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Geologic and anthropogenic changes are occuring
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in the Bays and the impact on habitats is unknown.
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In response to a request from the National Park Service, and
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the Tomales Bay Watershed Council
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[http://www.tomalesbaywatershed.org/]
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to determine the overall morphology of the floor of Tomales Bay,
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the Coastal and Marine Geology Team proposes to map the bathymetry and
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produce a detailed geologic and habitat map of Tomales and Bodega Bays.
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This task is necessary to establish a baseline
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of the bay floor morphology to compare future geologic and
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anthropogenic changes that might occur due to changes
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in land use or development in the surrounding watershed.
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This task will also be of importance
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in determining the possible pathways of pollutants entering the bays
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from the surrounding watersheds.
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Publications
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Anima, R.J., Chin, J.L., Finlayson, D.P., McGann, M.L., and Wong,
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F.L., Interferometric sidescan bathymetry, sediment and foraminiferal analyses: a new look at Tomales Bay, California, 2007, United States Geological Survey Open File Report 2007-XXX
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Got Help?
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For F-1-04-TB, we would appreciate any information on -- information to be derived, equipment used, information specialist, ports, publications, purpose, summary.
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