Other ID: 81-LH-1; LONGHORN-81-USGS1
Organization(s): USGS, Woods Hole Coastal and Marine Science Center
Location: Florida Straits, West Florida shelf, Florida, Gulf of Mexico, United States, North America, North Atlantic;
Principal Investigator(s): Peter Johnson
Affiliate Investigator(s): Chuck Holmes - USGS-Corpus Christi, TX
Data Type(s): Sonar: Sidescan, Seismics: Sub Bottom Profiler, Location-Elevation: Navigation
Scientific Purpose/Goals: Obtain seismic reflection data in the Florida Straits and the Florida Shelf; photograph the Miocene(?) ledge to confirm the existence of mineral deposits.
Start Date: 1981-05-27
Start Port/Location: Key West, FL
End Date: 1981-06-09
End Port/Location: Miami, FL
Equipment Used: Klein 531 sidescan, ORE 140 transceiver/1036 transducer sub-bottom profiler, Del Norte, transponder net, Loran-C
Information to be Derived: Grain size analysis; Sea floor map; Morphology;
Summary of Activity and Data Gathered: Sidescan: 550 km; Minisparker: 1603 km; 3.5 kHz: 608 km; Core (rotary drill): 1; Diver samples: 3; Camera stations: 3.
Staff: Charles W. Holmes, Ronald J. Miller, Peter Johnson, James C. McFarlen
Notes: Original Center People field contained: USGS-Corpus Christi: Chuck Holmes - Ch. Sci., Ronald Miller, Jack Kindinger, Paul Schoeder, James McFarlen; USGS-Woods Hole: Peter Johnson.