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USGS CMG M-2-94-EG Metadata

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ID M-2-94-EG
Abstract Chief Scientist: Gary Greene. Geophysical data (sidescansonar) of field activity M-2-94-EG in Mt. Edgecumbe lava field, Eastern Gulf of Alaska from 07/26/1994 to 07/29/1994
Chief Scientist Gary Greene
Activity Type Geophysical
Area of Operation Mt. Edgecumbe lava field, Eastern Gulf of Alaska, Eastern Gulf of Alaska
Bounding Coordinates
58.19291
-136.06551    -134.78860
56.85241
Dates 07/26/1994 (JD 207) to 07/29/1994 (JD 210)
Analog Materials No analog holdings.
Crew
Gary Greene Chief Scientist, USGS Western Region
Equipment Used
sidescansonar
Purpose
The object of the cruise was to map the seafloor morphology of rockfish habitats 
that had been observed on earlier submersible dives.
Summary
The survey successfully delineated the geometry and extent of the
offshore lava field, a 30 X 20 sq. km. area, and also highlighted substrate
habitats that are attractive to different rockfish. Two favorite fishing spots
lie on partially eroded volcanic cones. Side-scan imagery indicated the
shallowest cone has shear vertical walls that drop to a angular rubble apron on
one side; this cone attracts high concentrations of rockfish and lingcod. The
deeper cone had a more gentle morphology and significantly fewer rockfish and
lingcod, probably because less habitat shelter exists on the smooth surface of
the cone. NURP and Alaska Fish and Game anticipate that this type of surveying
to define fish habitats will be needed in the future in many areas of Alaska and
on fishing grounds in the lower 48 too].
Notes
(modified from USGS bulletin dated Aug.12,1994 and August GD News) -
ALASKA FISHERIES WORK.  Gary Greene, John Gann and Mike Boyle spent 2 days
side scan surveying near Sitka as part of a cooperative program with USGS,
Moss Landing, NURP and Alaska Department of Fish and Game.  Initially widely
spaced swaths were run to determine the character and extent of the Mt.
Edgecumbe lava field, which covers the shallow seafloor west of the Mt.
Edgecumbe volcano. Then overlapping side-scan survey were run over the
offshore extension of the southwest rift of the volcano; this survey will be
mosaicked at USGS.  On both the widely spaced and detailed swaths, a variety
of volcanic features were seen including cones, vents, plugs, collapsed lava
tubes, lava flow fronts, pressure ridges, and the like.
Got Help? For M-2-94-EG, we would appreciate any information on -- analog materials, contract, days at sea, dive count, funding, information specialist, information to be derived, kms of navigation, national plan, NGDC Info, organization, owner, platform, ports, project, project number, publications, scanned materials, seismic description, station count, station description, submersible, tabulated info.
Type Webpage KMZ Arc         Metadata        
Metadata data     txt  data  FAQ  xml
Navigation data nav    
Times   051.times    

M-2-94-EG location map of where navigation 

equipment operated
M-2-94-EG location map of where navigation 

equipment operated

 
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Page Last Modified: Tue Oct 29 13:12:34 PDT 2013  (chd)