Other ID: 76-2
Organization(s): USGS, Woods Hole Coastal and Marine Science Center
Location: Baltimore Trough, Mid-Atlantic Continental Shelf, United States, North America, North Atlantic;
Principal Investigator(s): David W. Folger
Data Type(s): Environmental Data: Temperature, Imagery: Photo, Location-Elevation: Navigation, Sampling: Chemistry, Visual Identification: Submersible Observations
Scientific Purpose/Goals: The purposes of this cruise were to: 1. survey the geologic and biologic conditions around the pipes and railroad wheels set in June 1975; 2. inspect the fully instrumented tripods in operation on the bottom prior to recovering them; 3. survey the COST drill site; and 4. make a downslope traverse near the shelf edge where Conservation Division seismic data suggested possible bottom instability.
Start Date: 1976-07-07
Start Port/Location: Woods Hole, MA
End Date: 1976-07-14
End Port/Location: Woods Hole, MA
Equipment Used: Niskin water sampler, Nikonos camera, XBT, Loran-A, Loran-C, Submersible Observation
Information to be Derived:
Summary of Activity and Data Gathered: Despite continuously poor weather, geology-biology surveys were carried out, 2 pipes not located, and tripod functions fully documented on bottom. At station 4119 lake or eel pouts interfered with sediment traps and curled into the current meter rotor vanes always oriented into the current, thus inhibiting short time variations in orientation. At station 4115 hake interfered with the current meters. Tripods were recovered in excellent condition. Moorings recovered: 2 (#113 and 114 deployed WHITEFOOT FA 76019 Jun. 14-17, 1976). Dives: 7 (#691, 692, 693, 694, 695, 696, and 697). Video; Submersible still photos; Niskin water samples: 3; Suspended matters samples: 9; XBTs: 8. Unable to locate 2 pipes.
Staff: Bradford Butman, David W. Folger, Phil Shea
Notes: Original Center People field contained: Dave Folger - Ch. Sci., Brad Butman, M. Mihalik, Phil Shea.
Butman, B., Noble, Marlene, and Folger, David W., 1979, Long-term observations of bottom current and bottom sediment movement on the mid-Atlantic continental shelf: Journal of Geophysical Research, JGR, v. 84 no. C3, URL: http://www.agu.org/journals/ABS/1979/JC084iC03p01187.shtml.