USGS CMG U-2-71-GM Metadata

Scientific objectives of Leg 2 were:
1) to investigate the evolution of the continental margin east of the Yucatan 
Peninsula and its relation to concepts of continental margin development:
2) to explore the possibility of structural and stratigraphic links between 
western Cuba and the Yucatan Peninsula;
3) to study the western terminus of the Cayman Ridge and Trench system and to 
determine its influence on the structure of British Honduras and Guatemala;
4) to examine the Yucatan Basin in order to interpret the origin of this 
distinct sea floor feature in the northwestern Caribbean;
5) to learn more about the nature of interaction between the North American and 
Caribbean plates in this area.

NSF/IDOE, From USGS Eastern Region admincru database...
    Control # --- 843
    PlatformDate ID --- UGEO19710619
    Sea Days --- 25
    Scientists --- 12
    Scientific Days --- 300
    WHFC Persons --- 9
    WHFC Person Days --- 225
    Study Region...
         Northern East Coast --- N
         Middle East Coast --- N
         Southern East Coast --- N
         Puerto Rico --- Y
         Gulf Coast --- N
         Virgin Islands --- Y

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

MCG Data Collection ID ---         U271GM
Institution Data Collection ID --- U271GM
NGDC ID ---                        06010002
Funding ---                        NSF/IDOE
Project, Cruise & Leg ---          LEG 2, E MARGIN YUCATAN PEN.
Study region ---                   +21.00000,+16.00000, -88.00000, -83.00000
Chief Scientist(s) ---             Jack Vedder
Name of vessel ---                 United Geo. I (surface ship)
Date field data collection started --- 06/27/71     (unspecified)
Date field data collection ended ---   07/08/71     (unspecified)
Parameters surveyed ---
   Bathymetry:                     surveyed, contained in data file
   Magnetics:                      surveyed, contained in data file
   Gravity:                        surveyed, contained in data file
   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 ---     03/10/88
Contributing institution ---       USGS Branch of Pacific Marine Geology
Country ---                        United States

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

Bathymetry instrumentation ---            (unspecified)
Additional forms of bathymetric data ---  (unspecified)
General rate of bathymetry in file ---    1.8 minutes
General collection rate of bathymetry --- (unspecified)
Assumed sound velocity ---                (unspecified)
Bathymetric datum code ---                No correction applied (sea level)
Bathmetry interpolation scheme ---        (unspecified)

Magnetics instrumentation ---            (unspecified)
Additional forms of magnetics data ---   (unspecified)
General rate of magnetics in file ---    1.8 minutes
General collection rate of magnetics --- (unspecified)
Magnetic sensor tow distance ---         (unspecified)
Magnetic sensor depth ---                (unspecified)
Two sensor horizontal separation ---     (unspecified)
Residual magnetics reference field ---   (unspecified)
Method of applying residual field ---    (unspecified)

Gravity instrumentation ---            (unspecified)
Additional forms of gravity data ---   (unspecified)
General rate of gravity in file ---    1.9 minutes
General collection rate of gravity --- (unspecified)
Theoretical gravity formula ---        (unspecified)
Reference system ---                   (unspecified)
Corrections applied ---                (unspecified)
Starting land tie ---                  (unspecified)
Ending land tie   ---                  (unspecified)

Seismic instrumentation --- (unspecified)
Formats of seismic data --- (unspecified)

Vedder, J.G., 1972, Acoustic Relfection Profiles, East Margin Yucatan Peninsula, 
International Decade of Ocean Exploration, Leg 2, 1971 Cruise, Unitedgeo I, 
USGS-GD-72-003 (see Analog materials list)

Dillon, W.P., Vedder, J.G., and Graf, R.J., 1972, Structural profile of the 
northwestern
Caribbean: Earth and Planetary Science Letters, v. 17, no. 1, p. 175-180. 


Vedder, J.G., MacLeod, N.S., Lanphere, M.A., and Dillon, W.P., 1973, Age and 
tectonic
implications of some low-grade metamorphic rocks from the Yucatan Channel: Journal of
Research of the U.S. Geological Survey, v. 1, no. 2, p. 157-164.


Arnal, R.E., and Vedder, J.G., 1976, Changes in Miocene paleobathymetry of California
continental borderland north of 32 degrees: American Association of Petroleum 
Geologists
Bulletin, v. 60, no. 4, American Association of Petroleum Geologists-Society For 
Sedimentary
Geology annual meeting, p. 646.