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General Information
File Identifier: gov.noaa.ngdc.mgg.geology:G00127
Metadata Date Stamp: 2015-10-05
Organization: DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Organization Role: pointOfContact
Identification Information
Title: The NGDC Seafloor Sediment Grain Size Database
Dataset Publication Date: 1976-12-31
Abstract: The NGDC (now NCEI) Seafloor Sediment Grain Size Database contains particle size data for over 17,000 seafloor samples worldwide. The file was begun by NGDC in 1976 in response to a need by the Outer Continental Shelf Environmental Assessment Program (OCSEAP) for a detailed, digital file of textural analyses. Data are from OCSEAP studies, academic institutions, environmental baseline studies conducted under contract to the Bureau of Land Management under the Outer Continental Shelf (OCS) Program, and from laboratory reports generated by the U.S. Naval Oceanographic Office. Data include collecting institution, ship, cruise, sample id, latitude/longitude, date of collection, water depth, sampling device, method of analysis, sample weight, sampled interval, raw weight percentages of sediment, within a given phi range. Some samples also have percentages of total gravel, sand, silt, clay, and statistical measurements such as mean, median, skewness, kurtosis, and standard deviation of grain size.
Credit US Department of Commerce, National Oceanic and Atmospheric Administration (NOAA), NOAA Satellite and Information Service (NESDIS), National Centers for Environmental Information (NCEI), and World Data Service for Geophysics, Boulder.
Constraints Cite as: National Geophysical Data Center (1976): The NGDC Seafloor Sediment Grain Size Database. National Geophysical Data Center, NOAA, doi:10.7289/V5G44N6W [date of access]
Data Type: Vector
Browse Graphic
Browse Graphic URL:
Browse Graphic Caption: image of a placer deposit
Browse Graphic Type: JPEG
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: -180
South Bounding Latitude: -78.3667
East Bounding Longitude: 180
North Bounding Latitude: 81.0705
Zoom to the resource envelope
Beginning Date: 1956-01-01
Ending Date: 2000-12-31
Data Quality Information
Scope (quality information applies to): Dataset
Data History: Lineage varies by data source. Most data were contributed originally to NOAA's former National Oceanographic Data Center (NODC) as part of larger environmental studies. NODC forwarded the grain size portion of these studies to NGDC for distribution and archive, and in many cases maintained a copy for the NODC archive. Relatively few data sets were contributed directly to the former National Geophysical Data Center (NGDC). Some data were coded by NGDC from paper reports, especially unpublished laboratory item reports from the U.S. Naval Oceanographic Office (NAVOCEANO). Some data were translated from other formats, including the historic 003 Intergovernmental Oceanographic Commission (IOC) format, and the University of Washington format.
Contact Information
Organization: DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, 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
Telephone: (303) 497-6339
Fax: (303) 497-6513
Distribution Information
Format Name: Text
Format Version: UTF-8
Distribution Link:
Distribution Link Function: Information
Metadata Reference Information
Acquisition Information
Instrument: In Situ/Laboratory Instruments
Platform: In Situ Ocean-based Platforms > SHIPS
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