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EBSSED database-Surficial sediments of the eastern Bering Sea continental shelf

browse graphicsample locations in study area
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.

Cite this dataset when used as a source.

Search and Download
  • G02124 data download (download)
    Web page of information about the database including links to full documentation and free data download from NGDC.
  • search by set (search)
    discovery via the NGDC marine geologic inventory
Distribution Formats
  • ASCII
Distributor DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Point of Contact DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
(303) 497-6339
geology.info@noaa.gov
General Documentation
  • dataset information page
    Web page of information about the database including links to full documentation and free data download from NGDC.
Originator
  • Smith, Keith R.
    NOAA-National Marine Fisheries Service, Alaska Fisheries Service Center
Originator
  • McConnaughey, Robert A.
    NOAA-National Marine Fisheries Service, Alaska Fisheries Service Center
Publisher
  • National Geophysical Data Center, NOAA
Date(s)
  • publication: 1999-12-31
  • revision: 1999-12-31
Edition: First
Data Presentation Form: Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status Complete
Data Update Frequency: Not planned  -  Completed data set, no additions planned.
Supplemental Information: Data from this report are available online from NGDC as data set MGG03995012, and also from the National Technical Information Service (NTIS) as NTIS No. PB2000-100938.
Purpose: research and resource management
Use Limitations
  • Please cite the originator of the data set, the date downloaded, and the National Geophysical Data Center, NOAA, as the source of the data.
  • Produced by the NOAA National Geophysical Data Center. Not subject to copyright protection within the United States.
Time Period: 1934-01-01  to  1997-12-31
Spatial Reference System: urn:ogc:def:crs:EPSG:4326
Spatial Bounding Box Coordinates:
N: 62.1535
S: 53.8575
E: -157.7
W: -179.1117
Spatial Coverage Map:
Themes
  • Scientific archives
  • Electronic records
  • Oceanography
  • Ocean bottom
  • Geology
  • Submarine geology
  • Marine sediments
  • Marine geology
  • Sea-floor characteristics
  • EARTH SCIENCE > Oceans > Marine Sediments > Geotechnical Properties
  • EARTH SCIENCE > Oceans > Marine Sediments > Sediment Composition
  • EARTH SCIENCE > Oceans > Marine Sediments > Sedimentary Textures
  • EARTH SCIENCE > Oceans > Marine Sediments
  • EARTH SCIENCE > Biosphere > Aquatic Ecosystems > Benthic Habitat
  • EARTH SCIENCE > Biosphere > Aquatic Ecosystems > Marine Habitat
  • EARTH SCIENCE > Oceans > Marine Environment Monitoring
Data Centers
  • WDC/GEOPHYSICS, BOULDER > World Data Center for Geophysics, Boulder
  • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Platforms
  • In Situ Ocean-based Platforms > SHIPS
Instruments
  • In Situ/Laboratory Instruments > Corers > CORING DEVICES
  • In Situ/Laboratory Instruments > Samplers > Grabbers/Traps/Collectors > GRAB SAMPLERS
  • In Situ/Laboratory Instruments > Corers > SEDIMENT CORERS
Places
  • VERTICAL LOCATION > SEA FLOOR
  • OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > BERING SEA
Projects
  • Unknown
Use 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.
Access Constraints
  • Access to this dataset is unrestricted.
Fees
  • free online download
Source Datasets
Lineage Statement Lineage prior to transfer to NGDC is unknown.
Processing Environment Native Dataset Environment: ASCII text

Metadata Last Modified: 2014-05-05

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