Identification_Information: Citation: Citation_Information: Originator: P.R. Briere Originator: K.M. Scanlon Originator: C.T. Gledhill Originator: C.C. Koenig Originator: G. Fitzhugh Originator: U.S. Geological Survey Publication_Date: 1999 Title: West Florida Shelf; sidescan-sonar and sediment data from shelf-edge habitats in the Northeastern Gulf of Mexico Geospatial_Data_Presentation_Form: online publication Series_Information: Series_Name: Open-File Report Issue_Identification: 99-589 Other_Citation_Details: U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole, Massachusetts Online_Linkage: http://pubs.usgs.gov/of/of99-589/ Description: Abstract: The U.S. Geological Survey (USGS), in cooperation with the National Oceanographic and Atmospheric Administration’s (NOAA) National Marine Fisheries Service (NMFS), and Florida State University (FSU), collected the data presented here as part of a larger study of seafloor habitats on the shelf edge of the northeastern Gulf of Mexico. It is a pilot study, carried out to demonstrate the utility of geologic mapping to fisheries management issues. This report contains sidescan-sonar mosaics, seismic-reflection profiles, texture and calcium carbonate content of sediment samples and interpretative maps of the seafloor morphology, sediments, and benthic habitats of the study area. The study area is an approximately 150-km2 area along the shelf edge in the northeastern Gulf of Mexico. The site is on the eastern side of the DeSoto Canyon and 75 km due south of Cape San Blas on the Florida panhandle. Water depth ranges from about 50 meters (m) to 120 m. It was chosen because reports from fishermen suggested that high-relief rocky outcrops, which are preferred by gag grouper as spawning aggregation sites, would be abundant. The geologic maps help the fisheries biologists select station locations for ongoing monitoring studies and provide a basis for siting of future reserves. Sediment data: In 1997, four surficial sediment grab samples were collected by C. Koenig during a cruise of the NOAA R/V Chapman. In 1998, an additional 51 sediment grab samples were collected by C. Gledhill during a cruise of the R/V Chapman and 3 by G. Fitzhugh during a cruise of the R/V Carretta. All samples were collected using a van Veen grab sampler. All samples (except those that were made up of chunks of coral or coral rubble) were analyzed for particle size and carbonate content in the sedimentology laboratory of the U.S.G.S. at Woods Hole, Massachusetts. Texture terminology used in this report is according to Folk (1974). The percent of calcium carbonate material was determined by weight loss of 15 grams of bulk material after digestion with 10 percent hydrochloric acid. Details of the laboratory techniques can be found in Appendix I: Sediment Texture Analysis Techniques. The data are presented in Appendix II: Table of Sediment Analyses. Purpose: The purpose of this data layer is to create a digital version of the sedimentary characteristics published by Briere and others (1999) for inclusion in the usSEABED data collection. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1999 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -86.2407 East_Bounding_Coordinate: -82.586 North_Bounding_Coordinate: 29.6327 South_Bounding_Coordinate: 24.8273 Keywords: Theme: Theme_Keyword_Thesaurus: General Theme_Keyword: sediment Theme_Keyword: sediment characteristics Theme_Keyword: physical properties Theme_Keyword: side-scan data Theme_Keyword: side-scan sonar Theme_Keyword: habitats Place: Place_Keyword_Thesaurus: General Place_Keyword: Gulf of Mexico Place_Keyword: Eastern Gulf of Mexico Place_Keyword: Florida Place_Keyword: Florida Panhandle Place_Keyword: Florida Pan Handle Access_Constraints: None Use_Constraints: None except that acknowledgement must be made in publications and reports of (i) the original data source, and (ii) the data integration by USGS and dbSEABED project at the University of Colorado. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Kathryn M. Scanlon Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543 Country: USA Contact_Voice_Telephone: (508) 458-8700 x2323 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: kscanlon@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: 99589.jpg Browse_Graphic_File_Description: Image showing geographic extent of data layer coverage Data_Set_Credit: Please review the cross reference information for the original data set credit to Briere and others (1999), and Jamey Reid for digitizing samples locations and entering the data from the source report. Native_Data_Set_Environment: Microsoft Windows 2000 Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 8.3.0.800 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: All attributes were entered and checked in a consistent manner. Logical_Consistency_Report: No additional check for topological consistency were performed on this data. Completeness_Report: Sedimentary descriptions and locations are provided for 78 samples. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Navigational accuracy is unknown. Lineage: Process_Step: Process_Description: Digital data were hand formatted into dbSEABED data entry structure, then filtered and data-mined through dbSEABED software (version: db9_MNEx.bas) Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Jane Reid Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical Address: 400 Natural Bridges Drive City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Country: USA Contact_Voice_Telephone: (831) 427-4727 Contact_Facsimile_Telephone: (831) 427-4748 Contact_Electronic_Mail_Address: jareid@usgs.gov Contact_Instructions: email preferred Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity point Point_and_Vector_Object_Count: 78 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.1234 Longitude_Resolution: 0.1234 Geographic_Coordinate_Units: Decimal degrees Distribution_Information: Resource_Description: Briere and others, 1999 Distribution_Liability: Although this data set has been used by the U.S. Geological Survey (USGS), no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Trade, firm, or product names and other references to non-USGS products and services are provided for information only and do not constitute endorsement or warranty, express or implied, by the USGS, USDOI, or U.S. Government, as to their suitability, content, usefulness, functioning, completeness, or accuracy. Metadata_Reference_Information: Metadata_Date: 20060327 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Brian J. Buczkowski Contact_Position: Core Curator and Data Management Specialist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 x2361 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: bbuczkowski@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Access_Constraints: None Metadata_Use_Constraints: None Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile