U.S. Geological Survey 2007 1.0 vector digital data Open-File Report 2006-1195 Woods Hole Coastal and Marine Science Center, Woods Hole, MA U.S. Geological Survey, Coastal and Marine Geology Program https://doi.org/10.3133/ofr20061195 https://pubs.usgs.gov/of/2006/1195/htmldocs/data_catalog.htm https://pubs.usgs.gov/of/2006/1195/data/usseabed/la_ext.zip S.J. Williams M.A. Arsenault B.J. Buczkowski J.A. Reid J.G. Flocks M.A. Kulp S. Penland 2007 1.0 Open-File Report 2006-1195 Reston, VA U.S. Geological Survey https://pubs.usgs.gov/of/2006/1195/ This data layer is a point coverage of known sediment samplings, inspections and probings from the usSEABED data collection and integrated using the software system dbSEABED. This data layer represents the extracted (EXT) output of the dbSEABED mining software. It contains data items which were simply extracted from the data resources through data mining. The EXT data is usually based on instrumental analyses (probe or laboratory) but may apply to just a subsample of the sediment (eg. no large shells). To build a digital mapping of the character of the seabed on regional, national and global scales. These data are intended for science researchers, students, policy makers, and the general public. The data can be used with geographic information systems (GIS) software to display geologic and oceanographic information. This data layer is a subset of the original usSEABED Gulf Coast data release version 1.0, and is geographically clipped to the Louisiana geographical region. 2007 publication date Planned As needed -94.399440 -88.202000 30.643000 26.405000 USGS Metadata Identifier USGS:945facfd-ff24-4087-95b1-f7e697ae7692 None analyses CMGP Coastal and Marine Geology Program dbSEABED descriptions geology grain size Marine Aggregates Resources and Processes seabed seafloor sediment data texture U.S. Geological Survey USGS usSEABED Woods Hole Science Center University of Colorado Institute of Arctic and Alpine Research Benthic Habitats (Pacific) Project Pacific Science Center WHSC PSC INSTAAR ISO 19115 Topic Category oceans location geoscientificInformation NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 5.3.3 Oceans Marine Sediments Biogenic Sediments Sediment Chemistry Sediment Composition Sediment Textures Sedimentation Terrigenous Sediments USGS Thesaurus geospatial datasets sea-floor characteristics None Louisiana Ship Shoal Trinity Shoal Gulf Coast Gulf of Mexico United States New Orleans None Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information. Matthew A. Arsenault U.S. Geological Survey IT Specialist (Data Management) mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543-1598 USA (508) 548-8700 x2354 (508) 457-2310 marsenault@usgs.gov https://pubs.usgs.gov/of/2006/1195/browseimages/la_ext.jpg Image map showing extent of data layer coverage JPEG Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.1.1332 B.J. Buczkowski J.A. Reid C.J. Jenkins J.M. Reid S.J. Williams J.G. Flocks 2006 1.0 Data Series 146 Reston, VA U.S. Geological Survey https://pubs.usgs.gov/ds/2006/146/ Accuracy of each attribute is dependent on the accuracy of the lineage data. Data in usSEABED are based on the observations and analyses of others, filtered through a unifying and mining software. Each source report varies in type of information/data recorded and format. Only those observations that are recorded can be filtered and mined; only presence (not absence) or information can be noted. Additional useable data may exist in this area; the authors appreciate any information and leads. Locational accuracy is dependent on the accuracy of the navigational technique from the individual data sources and may vary widely (e.g., from 0.005km (differential GPS) in more recent surveys to greater than 2 km based on radar, Loran, or dead reckoning in older surveys.) Users of the data should use their own criteria for assessing the accuracy of the locations. Locational accuracy is dependent on the accuracy of the navigational technique from the individual data sources. Users of the data should use their own criteria for assessing the accuracy of the locations. U.S. Geological Survey University of Colorado 2006 1.0 vector digital data Data Series 146 Wooods Hole Coastal and Marine Science Center, Woods Hole, MA U.S. Geological Survey, Coastal and Marine Geology Program https://pubs.usgs.gov/ds/2006/146/data/gmx_ext.zip B.J. Buczkowski J.A. Reid C.J. Jenkins J.M. Reid S.J. Williams J.G. Flocks 2006 1.0 Data Series 146 Reston, VA U.S. Geological Survey See separate listing contained within the Larger_Work_Citation of the Source_Citation for specific sources and associated metadata https://pubs.usgs.gov/ds/2006/146/ online 2006 publication date Information unavailable from original metadata. point locations, descriptions and analytical data on many different types of sediment and rock materials and benthos for the entire Gulf coast The data contained in this report were clipped from the larger citation using the 'Select' tool in the ArcToolbox, and selected using the following criteria: "LATITUDE" >=26.405 and "LATITUDE" <=30.643 and "LONGITUDE" <=-88.2020 and "LONGITUDE" >=-94.39667 GMX_EXT 2006 LA_EXT Matthew A. Arsenault U.S. Geological Survey IT Specialist (Data Management) mailing and physical address

384 Woods Hole Rd

Woods Hole MA 02543-1598 USA 508-548-8700 x2354 508-457-2310 marsenault@usgs.gov Edits to the metadata were made to fix any errors that MP v 2.9.36 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. Other minor edits were probably performed (title, publisher, publication place, etc.). Reordered the links in the identification section so a landing page link is first. Attempted to modify http to https where appropriate. Some attributes were incompletely defined and had to be modified to meet the standard. Modified the browse graphic to point to the image of this dataset. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent. 20171020 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov USGS Thesaurus keywords added to the keyword section. 20180720 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov Crossref DOI link was added as the first link in the metadata. 20191118 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov Added keywords section with USGS persistent identifier as theme keyword. 20200908 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov Vector Entity point 23928 0.000001 0.000001 Decimal degrees North American Datum of 1927 Clarke 1866 6378206.400000 294.978698 la_ext Shapefile Attribute Table ESRI FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. LATITUDE Latitude coordinate of sample location source data Information unavailable from original metadata. Information unavailable from original metadata. decimal degrees LONGITUDE Longitude coordinate of sample location source data Information unavailable from original metadata. Information unavailable from original metadata. decimal degrees WATERDEPTH measured water depth for site (usually uncorrected) source data Information unavailable from original metadata. Information unavailable from original metadata. meters SAMPLETOP measured subbottom depth information for each point sample Information unavailable from original metadata. Information unavailable from original metadata. Information unavailable from original metadata. meters SAMPLEBASE measured subbottom depth information for each point sample Information unavailable from original metadata. Information unavailable from original metadata. Information unavailable from original metadata. meters SITENAME Survey or laboratory code for site (non-unique) Information unavailable from original metadata. Information unavailable from original metadata. DATASETKEY Unique sequential numeric key to SRC file dbSEABED processing software Information unavailable from original metadata. SITEKEY Unique sequential numeric key to SRC file dbSEABED processing software Information unavailable from original metadata. SAMPLEKEY Unique sequential numeric key to SRC file dbSEABED processing software Information unavailable from original metadata. SAMPLER Equipment used to collect samples Original data source Information unavailable from original metadata. DATATYPES Type of data that were used to derive values held in characterization Information unavailable from original metadata. ACU Acoustic Properties dbSEABED Data Entry Template CMP Sediment Composition dbSEABED Data Entry Template COL Color dbSEABED Data Entry Template GTC Geotechnical Properties dbSEABED Data Entry Template GRZ Grain Size dbSEABED Data Entry Template TXR Texture dbSEABED Data Entry Template TXG Texture (Graphic) dbSEABED Data Entry Template LTH Lithology dbSEABED Data Entry Template GRAVEL Gravel grainsize fraction Original data source 0 100 percent 1 SAND Sand grainsize fraction Original data source 0 100 percent 1 MUD Mud grainsize fraction Original data source 0 100 percent 1 CLAY Clay grainsize fraction Original data source 0 100 percent 1 GRAINSIZE Phi characteristic grainsize Information unavailable from original metadata. -7.3 12 phi 0.1 SORTING Phi grainsize dispersion; standard deviation sorting only Information unavailable from original metadata. 0 6 phi 0.1 SEABEDCLS Seabed class; (Facies) with the maximum Fuzzy Membership value > 30% dbSEABED processing software Information unavailable from original metadata. CLSMSHP Class membership; fuzzy membership (%) of above Class (Facies) dbSEABED processing software Information unavailable from original metadata. FOLKCODE Grainsize classification Folk, Andrews, and Lewis, 1970 (g)M slightly gravelly mud dbSEABED software, version MNEt (g)mS slightly gravelly muddy sand dbSEABED software, version MNEt (g)sM slightly gravelly sandy mud dbSEABED software, version MNEt (g)S slightly gravelly sand dbSEABED software, version MNEt G gravel dbSEABED software, version MNEt gM gravelly mud dbSEABED software, version MNEt gmS gravelly muddy sand dbSEABED software, version MNEt gS gravelly sand dbSEABED software, version MNEt M mud dbSEABED software, version MNEt mG muddy gravel dbSEABED software, version MNEt mS muddy sand dbSEABED software, version MNEt msG muddy sandy gravel dbSEABED software, version MNEt S sand dbSEABED software, version MNEt sG sandy gravel dbSEABED software, version MNEt sM sandy mud dbSEABED software, version MNEt SHEPARDCOD Shepard code; grain size classification Information unavailable from original metadata. CLAYEY SILT Information unavailable from original metadata. Information unavailable from original metadata. SANDY SILT Information unavailable from original metadata. Information unavailable from original metadata. SAND SILT CLAY Information unavailable from original metadata. Information unavailable from original metadata. SILTY CLAY Information unavailable from original metadata. Information unavailable from original metadata. SAND Information unavailable from original metadata. Information unavailable from original metadata. SILTY SAND Information unavailable from original metadata. Information unavailable from original metadata. SEDIMENT Information unavailable from original metadata. Information unavailable from original metadata. CLAYEY SAND Information unavailable from original metadata. Information unavailable from original metadata. CLAY Information unavailable from original metadata. Information unavailable from original metadata. SANDY CLAY Information unavailable from original metadata. Information unavailable from original metadata. SILT Information unavailable from original metadata. Information unavailable from original metadata. GRAVELLY SEDIMENT Information unavailable from original metadata. Information unavailable from original metadata. GRAVEL Information unavailable from original metadata. Information unavailable from original metadata. ROCKMSHP Rock membership; fuzzy membership (%) reflecting percent exposure of rock dbSEABED processing software -99 no data Information unavailable from original metadata. WEEDMSHP Weed membership; fuzzy membership (%) reflecting percent abundance of seaweed and seagrass dbSEABED processing software -99 no data Information unavailable from original metadata. CARBONATE Carbonate, including finest to coarsest sampled fractions Information unavailable from original metadata. Information unavailable from original metadata. MUNSLCODE Munsell color code GSA Rock-Color Chart, 1991 non-unique code based on HVC (Hue, Value, Chroma) ORGCARBON organic carbon in the sample Information unavailable from original metadata. 0 100 percent LGSHEARSTR Undrained compressive shear strength, Log10 of KiloPascals dbSEABED processing software -99 no data dbSEABED software, version MNEt POROSITY Void volume dbSEABED processing software Information unavailable from original metadata. Information unavailable from original metadata. percent PWAVEVEL Compressional wave velocity dbSEABED processing software Information unavailable from original metadata. Information unavailable from original metadata. meters/second ROUGHNESS A coded output representing the V:H of the roughness element with greatest aspect ratio dbSEABED processing software Information unavailable from original metadata. Information unavailable from original metadata. values expressed as (rounded) integer log2 of V and H in cm LGCRSHST Log Critical Shear Stress, Log10 of Tau in kPa, being the Shear Stress required to initiate easily observable erosion and transport, whether by traction or suspension Information unavailable from original metadata. Information unavailable from original metadata. Information unavailable from original metadata. kPa SAMPLEPHAS Sample Phase; records whether the results are for the whole, bulk sediment or just to some special part dbSEABED processing software Output as a word-based description that may involve numerics. This field will need to be selected against when GIS mappings of the bulk sediment characters are being mapped. Only blank entries should be included in such a mapping. Values of -99 for any field are indications that there was no data available. U.S. Geological Survey Matthew A. Arsenault U.S. Geological Survey IT Specialist (Data Management) mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 USA (508) 548-8700 x2354 (508) 457-2310 marsenault@usgs.gov Downloadable Data 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. ASCII Text file containing data input to usSEABED. Fields are comma separated values. First record of file contains field names. no compression applied 19.1 https://pubs.usgs.gov/of/2006/1195/data/usseabed/la_ext.txt Downloadable thru the WWW CD-ROM 650 Mbytes ISO 9660 and HFS SHP 3.3 ESRI Shapefile The SHP file contains the geospatial data. The SHX file contains the index of the geospatial data. The DBF file contains the attribute data in dBASE format. The PRJ file contains the coordinate system information (optional). The AVL file contains the legend information (optional). The SBN and SBX files contain the spatial index of the geospatial data (optional). The XML file contains the metadata describing the data set <data set name>.shp.xml. An ASCII version of the metadata file. A browse graphic showing the data layer coverage and extent (optional). winzip https://pubs.usgs.gov/of/2006/1195/data/usseabed/la_ext.zip https://pubs.usgs.gov/ofr/2006/1195/htmldocs/data_catalog.htm Downloadable thru the WWW CD-ROM 650 Mbytes ISO 9660 and HFS None These data are available in Environmental Systems Research Institute (ESRI) shapefile format. The user must have ArcGIS® or ArcView® 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing the data. A free data viewer, arcexplorer, capable of displaying the data is available from ESRI at www.esri.com. 20240318 Matthew A. Arsenault U.S. Geological Survey IT Specialist (Data Management) mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 USA (508) 548-8700 x2354 (508) 457-2310 whsc_data_contact@usgs.gov The metadata contact email address is a generic address in the event the person is no longer with USGS. (updated on 20240318) FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time None None