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General Information
File Identifier: gov.noaa.ngdc.mgg.geology:G02124
Metadata Date Stamp: 2014-04-15
Organization: DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Organization Role: pointOfContact
Identification Information
Title: EBSSED database-Surficial sediments of the eastern Bering Sea continental shelf
Dataset Publication Date: 1999-12-31
Abstract: In order to facilitate descriptions of groundfish habitat over a large portion of the EBS shelf, the NMFS/AFSC has assembled a single comprehensive database of the point sample data (EBSSED; n=2,587) from all available sources. The database represents sediment variation over the study area with uncompromized (i.e., original) spatial detail. Textural data in the database are of two main types: 1) standardized statistics characterizing sample grain size distribution based on laboratory measurements (granulometric data), including percent composition by size grades (e.g., gravel, sand, mud) and size distribution parameters (e.g., mean size); and 2) sample descriptions from less exacting, more subjective visual/tactile observations, usually made in the field, establishing size-grade constituents. In addition the EBSSED database includes two descriptive fields which were each added to characterize sample grain size distribution by a single, standardized variable based on the original data. These fields classify samples according to gravel-sand-mud composition using high and low resolution schemes derived from Folk's (1954) classic ternary diagram. The high resolution scheme classifies 903 samples with detailed granulometric data into 15 textural classes, providing the greater detail regarding textural variation. The low resolution scheme (7 classes) is designed to allow unambiguous classification of nearly all samples (n=2457) including those with subjective visual/tactile descriptions. It represents the maximum number of samples according to a single common variable and thus provides the most spatially detailed data for the study area, albeit at the expense of some of the textural detail for samples analyzed in the laboratory. Overall, the EBSSED database is the most comprehensive and detailed source of information about surficial sediment textures in the EBS study area. Patterns observed in the data generally agree with large-scale textural maps and summaries by previous investigators, particularly a general pattern, with exceptions, of decreasing average grain size with increasing depth and distance from shore. However, those previous large-scale works spatially smoothed data for the study area from smaller, more sparsely distributed sets of samples. The EBSSED database preserves potentially important fine-scale variation.
Credit Smith, Keith R., and Robert A. McConnaughey. 1999. Surficial sediments of the eastern Bering Sea continental shelf: EBSSED database documentation. U.S. Department of Commerce, NOAA Technical Memorandum NMFS-AFSC-104, 41 p.
Constraints While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
Data Type: point
Browse Graphic
Browse Graphic URL: http://www.ngdc.noaa.gov/mgg/image/geolin/preview03995012.gif
Browse Graphic Caption: sample locations in study area
Browse Graphic Type: GIF
Data Theme
Theme Topics: Geological and Geophysical, Oceans and Estuaries
Reference System Information
Reference System URN: urn:ogc:def:crs:EPSG:4326
Spatial Domain
West Bounding Longitude: -179.1117
South Bounding Latitude: 53.8575
East Bounding Longitude: -157.7
North Bounding Latitude: 62.1535
Zoom to the resource envelope
Beginning Date: 1934-01-01
Ending Date: 1997-12-31
Data Quality Information
Scope (quality information applies to): Dataset
Data History: Lineage prior to transfer to NGDC is unknown.
Contact Information
Organization: DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Contact Position: Marine Geology Data Manager
Address: 325 Broadway, Mail Code E/GC3
City: Boulder
State: CO
Postal Code: 80305-3328
Country: USA
Email: carla.j.moore@noaa.gov
Telephone: (303) 497-6339
Fax: (303) 497-6513
Distribution Information
Format Name: ASCII
Distribution Link: http://www.ngdc.noaa.gov/mgg/geology/03995012.html
Distribution Link Function: Information
Metadata Reference Information
Acquisition Information
Instrument: various
Platform: SHIPS > SHIPS
/geoportal/rest/document?f=html&id=%7BF6DE3033-D0B3-4D1F-B27C-B1558B9800F0%7D
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