USGS CMG L-5-81-NC Metadata

! Converted to time format with year at start.
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DATA COLLECTION OVERVIEW  (use NGDC GEODAS CD to retrieve data)

MCG Data Collection ID ---         L581NC
Institution Data Collection ID --- L581NC
NGDC ID ---                        06050054
Funding ---                        (unspecified)
Project, Cruise & Leg ---          (unspecified)
Study region ---                   +45.00000,+40.00000,-126.00000,-124.00000
Chief Scientist(s) ---             Sam Clarke,Mike Field,Parke Snav
Name of vessel ---                 Lee (surface ship)
Date field data collection started --- 05/20/81     EUREKA
Date field data collection ended ---   05/29/81     NEWPORT, OR
Parameters surveyed ---
   Bathymetry:                     surveyed, contained in data file
   Magnetics:                      surveyed, contained in data file
   Gravity:                        (unspecified)
   High-resolution seismics:       (unspecified)
   Deep penetration seismics:      (unspecified)
Format --- 

(I1,A8,F5.2,4I2,F5.3,F8.5,F9.5,I1,F6.4,F6.1,I2,i1,3F6.1,I1,F5.1,F6.0,F7.1,F6.1,F5.1,A8,4I1)
Date of data input to NGDC ---     01/26/90
Contributing institution ---       USGS Branch of Pacific Marine Geology
Country ---                        United States

Navigation instrumentation ---     (unspecified)
Position determination method ---  (unspecified)

Bathymetry instrumentation ---            12KHZ NARROW 1SEC,3.5KHZ WIDE 1 SEC
Additional forms of bathymetric data ---  RECORDER ROLLS
General rate of bathymetry in file ---    0.8 minutes
General collection rate of bathymetry --- 20/SECONDS
Assumed sound velocity ---                1463.0 m/sec
Bathymetric datum code ---                No correction applied (sea level)
Bathmetry interpolation scheme ---        (unspecified)

Magnetics instrumentation ---            PROTON PRECESSION MAG-GEOMETRICS G-801
Additional forms of magnetics data ---   ANALOG RECORDS
General rate of magnetics in file ---    0.8 minutes
General collection rate of magnetics --- 4 seconds
Magnetic sensor tow distance ---         213 meters
Magnetic sensor depth ---                (unspecified)
Two sensor horizontal separation ---     (unspecified)
Residual magnetics reference field ---   IGRF-75
Method of applying residual field ---    LINEAR INTERP. BETWEEN NAV POINTS

Gravity instrumentation ---            (unspecified)
Additional forms of gravity data ---   (unspecified)
General rate of gravity in file ---    (unspecified)
General collection rate of gravity --- 15 seconds
Theoretical gravity formula ---        International 1930
Reference system ---                   System IGSN 71
Corrections applied ---                DRIFT CORRECTIONS
Starting land tie ---                  (unspecified)
Ending land tie   ---                  (unspecified)

Seismic instrumentation --- 24 CHANNEL,SLAVE RECORD MASTER RECORD
Formats of seismic data --- (unspecified)

Field, Michael E., and Kvenvolden, Keith A., 1987, Preliminary report on gaseous
hydrocarbons in sediment and seeps, offshore Eel River basin, California, in 
Schymiczek,
Herman, and Suchsland, Reinhard, eds., Tectonics, sedimentation and evolution of the Eel
River and associated coastal basins of Northern California; proceedings of a 
symposium:
Bakersfield, CA, San Joaquin Geological Society.