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Items below are listed from most recently updated to least recently updated.
These are results 1 through 16 of 16 matches.
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General Information Cruise Report, G1-03-GM, USGS Gas Hydrates Cruise, |
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Research Project Pacific Sea-Floor Mapping |
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Publication USGS OFR 02-411 - Multibeam Mapping of Selected Areas of the Outer Continental Shelf, Northwestern Gulf of Mexico - Data, Images, and GIS |
Description: Following the publication of high-resolution multibeam echosounder (MBES) images and data of the Flower Gardens area of the northwest Gulf of Mexico outer continental shelf (Gardner et al., 1998), the Flower Gardens Banks National Marine Sanctuary (FGBNMS) and the Minerals Management Service (MMS) have been interested in additional MBES data in the area. A coalition of FGBNMS, MMS, and the US Geological Survey (USGS) was formed to map additional areas of interest in the northwestern Gulf of Mexico (Fig. 1) in 2002. The areas were chosen by personnel of the FGBNMS and the choice of MBES was made by the USGS. MMS and FGBNMS funded the mapping and the USGS organized the ship and multibeam systems through a Cooperative Agreement between the USGS and the University of New Brunswick. The University of New Brunswick (UNB) contracted the RV Ocean Surveyor and the EM1000 MBES system from C&C; Technologies, Inc., Lafayette, LA. C&C; personnel oversaw data collection whereas UNB personnel conducted the cruise and processed all the data. USGS personnel were responsible for the overall cruise including the final data processing and digital map products.
Description: The mid to outer continental shelf off Mississippi-Alabama and off northwest Florida were the focus of US Geological Survey (USGS) multibeam echosounder (MBES) mapping cruises in 2000 and 2001, respectively. These areas were mapped to investigate the extent of "deep-water reefs" first suggested by Ludwick and Walton (1957). The reefs off Mississippi and Alabama were initially described in water depths of 60 to 120 m (Ludwick and Walton, 1957) but the 2000 mapping found reef and hardgrounds to be much more extensive than previously thought (Gardner et al., 2001). The persistent trend of reef-like features along the outer shelf of Mississippi-Alabama suggested the trend might continue along the northwest Florida mid and outer shelf so a MBES-mapping effort was mounted in 2001 to test this suggestion. It is critical to determine the accurate location, geomorphology, and types of the ridges and reefs that occur in this region to understand the Quaternary history of the area and to assess their importance as benthic habitats for fisheries. The 2001 survey found a series of shelf-depth platforms with ridges (possibly reefs) constructed on their surfaces (Gardner et al., 2002).
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Publication Gulf of Mexico GLORIA Sidescan Sonar Geologic Interpretation |
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Publication Lake Pontchartrain, LA, Geochemistry |
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Publication SeaMARC 1A sidescan sonar mosaic, cores and depositional interpretation of the Mississippi Fan: ArcView GIS Data Release |
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Publication U.S. Geological Survey Open-File Report 00-352 |
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Map Coastal and Marine Geology Program Internet Map Server |
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Data Set Global Inventory of Natural Gas Hydrate Occurance |
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Publication Mapping Turbidite System Pathways on the Lousiana Continental Slope with GLORIA and Multibeam Bathymetry |
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General Information Education and Outreach Information |
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Educational Materials GLORIA Imagery of the Exclusive Economic Zone of the USA |
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General Information El Niņo Home Page |
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Research Project Gas Hydrates in the Gulf of Mexico |
| These are results 1 through 16 of 16 matches. | |
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U. S. Department of the Interior | U.S. Geological Survey