The NGDC Seafloor Sediment Grain Size Database

Metadata Updated: January 9, 2016

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.

Access & Use Information

Downloads & Resources

Dates

Metadata Date December 31, 2015
Metadata Created Date September 27, 2015
Metadata Updated Date January 9, 2016
Reference Date(s) December 31, 1976 (publication), December 31, 2000 (revision)
Frequency Of Update notPlanned

Graphic Preview

image of a placer deposit

Additional Metadata

Resource Type Dataset
Metadata Date December 31, 2015
Metadata Created Date September 27, 2015
Metadata Updated Date January 9, 2016
Reference Date(s) December 31, 1976 (publication), December 31, 2000 (revision)
Responsible Party DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce (Point of Contact)
Contact Email
Access Constraints Cite as: National Geophysical Data Center (1976): The NGDC Seafloor Sediment Grain Size Database. NOAA National Centers for Environmental Information. doi:10.7289/V5G44N6W [date of access], Access to this dataset is unrestricted., 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.
Bbox East Long 180
Bbox North Lat 81.0705
Bbox South Lat -78.3667
Bbox West Long -180
Coupled Resource
Frequency Of Update notPlanned
Graphic Preview Description image of a placer deposit
Graphic Preview File http://www.ngdc.noaa.gov/mgg/image/placer.jpg
Graphic Preview Type JPEG
Guid gov.noaa.ngdc.mgg.geology:G00127
Licence Please cite the originator of the data set, the date downloaded, and the National Centers for Environmental Information, NOAA, as the source of the data., Produced by the NOAA National Centers for Environmental Information. Not subject to copyright protection within the United States.
Metadata Language eng: USA
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System urn:ogc:def:crs:EPSG:4326
Spatial Harvester True
Temporal Extent Begin 1956-01-01
Temporal Extent End 2000-12-31

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