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Items below are listed from most recently updated to least recently updated.
These are results 1 through 25 of 116 matches.
General Information USGS Open-File Report 03-320, Mapping the floor of Lake Mead (Nevada and Arizona): Preliminary discussion and GIS data release, Title Page |
General Information U.S. Geological Survey Open-File Report 03-221 |
General Information Cruise Report, G1-03-GM, USGS Gas Hydrates Cruise, |
Publication Predicting the Long-Term Fate of Sediments and Contaminants in Massachusetts Bay - USGS Fact Sheet 172-97 |
Publication Sedimentary Environments in Long Island Sound: A Guide to Sea-Floor Management in a Large Urbanized Estuary - USGS Fact Sheet 041-98 |
Publication Coastal Erosion of Southern Lake Michigan - USGS Fact Sheet |
Publication The Escanaba Trough of Gorda Ridge: A Laboratory for Mineral-forming Processes - USGS Fact Sheet |
Publication Gas (Methane) Hydrates -- A New Frontier - USGS Fact Sheet |
Publication Geology of the Gulf of the Farallones National Marine Sanctuary - USGS Fact Sheet |
Publication High-Energy Storms Shape Puerto Rico - USGS Fact Sheet |
Publication Monterey Bay Marine Sanctuary Geological Processes and Framework - USGS Fact Sheet |
Publication Seafloor Images Refine Petroleum Exploration Models - USGS Fact Sheet |
Publication Seafloor Studies of Mamala Bay, Honolulu, Hawaii - USGS Fact Sheet |
Publication Maps Showing the Stratigraphic Framework of South Carolina's Long Bay from Little River to Winyah Bay |
General Information High-Resolution Subsurface Imaging of Coastal Barriers, USGS Open-File Report 03-254, Home Page |
Map High-resolution seismic-reflection surveys in the nearshore of outer Cape Cod, Massachusetts, U.S. Open-File Report 03-235, Title Page |
Map Topography, shaded relief, and backscatter intensity of the |
Research Project Pacific Sea-Floor Mapping |
Publication USGS OFR 03-250 - Bed-Sediment Grain-Size and Morphologic Data from Suisun, Grizzly, and Honker Bays, CA, 1998-2002 |
Publication USGS OFR 03-265 - Grand Canyon Riverbed Sediment Changes, Experimental Release of September 2000 - A Sample Data Set |
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).
Publication USGS OFR 02-391 - USGS Western Region Coastal and Marine Geology, Multibeam Bathymetry and Selected Perspective Views of Main Part of Glacier Bay, Alaska |
Publication USGS OFR 03-110 - Cruise Report for A1-02-SC: Southern California CABRILLO project, Earthquake Hazards Task |
These are results 1 through 25 of 116 matches. | |
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