1. Coastal and Marine Hazards and Resources
2. Geoscience Data System

Field Activity 1974-015-FA

Identifier	1974-015-FA
Alternate names	KNKE BLM-Leg Charlie; CORPUS 24/30
Purpose	The overall program is a baseline assessment of the South Texas Outer Continental Shelf. Objectives of the geological studies being carried out under the program by the USGS are: nature and distribution of bottom sediments, nature of suspended sediments in the water column, trace metals chemistry of sediments; late Pleistocene and Holocene structural and sedimentologic evolution of the shelf; delineation of surface areas of the shelf where geologic conditions might be hazardous to petroleum development; and predictive evaluation to the extent possible of the possible effects of the physical and chemical processes operative across the shelf on the dispersion and assimilation of contaminants that might be generated by petroleum development.
Location	south Texas outer continental shelf, Texas, United States, Gulf of Mexico, North America, North Atlantic;
Summary	Patterns on the acoustic profiles that are believed to be gas seeps were recorded at a number of places on the shelf (most numerous on the outer edge of the shelf). Extensive faulting exists over most parts of the South Texas OCS. The submerged reefs, or so-called topographic highs, are but the exposed part of extensive thin carbonate banks buried by sedimentation. Smith-MacIntyre grabs: 40; Gravity cores: 13; Box cores: 32; Benthic faunal collections: 72; XBTs: 12; Surface drifter casts: 36 (3 at each of 12 stations); Quality control sample for trace metals: 6; Hydrocarbon back-up sample: 32; Water samples for suspended sediments: 9 (3 at each of 3 stations); Minisparker: 1,000 mi.; 3.5 kHz profiles: 1,400 miles; 12 kHz PDR; Klein Model 400 sidescan sonar: approx. 400 miles.
Comments	Project = Marine geological survey of the South Texas OCS, Marine geological survey of the South Texas OCS
Related activities	1974-012-FA: Cruise legs
Platform	Kana Keoki 156 feet
Itinerary	Start (port not specified) 1974-11-29 End (port not specified) 1974-12-21 Days in the field 24
Bounds	West -97.25 East -95.8 North 28.5 South 26 Show or hide mapHide layers