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The NGDC Seafloor Sediment Grain Size Database

browse graphicimage of a placer deposit
The NGDC 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.

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]

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Distribution Formats
  • Text (Version: UTF-8)
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
Originator
  • Multiple Investigators and projects
Originator
  • National Geophysical Data Center
Publisher
  • National Geophysical Data Center, NOAA
Date(s)
  • publication: 1976-12-31
  • revision: 2000-12-31
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  -  Although no updates are planned, project-specific updates are possible if resources become available.
Supplemental Information: Quality control: Missing data or gross percentage errors are noted. Processing: Data sources include contractors for the Outer Continental Shelf Environmental Assessment Program; contractors for the Outer Continental Shelf Office, Bureau of Land Management; and project managers from academic institutions.
Purpose: environmental research
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: 1956-01-01  to  2000-12-31
Spatial Reference System: urn:ogc:def:crs:EPSG:4326
Spatial Bounding Box Coordinates:
N: 81.0705
S: -78.3667
E: 180
W: -180
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
  • EARTH SCIENCE > Paleoclimate > Ocean/Lake Records > Sediments
  • EARTH SCIENCE > Solid Earth > Sediments
  • EARTH SCIENCE > Oceans > Marine Sediments > Sedimentary Textures
  • EARTH SCIENCE > Oceans > Marine Environment Monitoring
  • CIESIN > Environmental Protection > Environmental 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
  • GEOGRAPHIC REGION > GLOBAL OCEAN
  • VERTICAL LOCATION > SEA FLOOR
Projects
  • OCS > Outer Continental Shelf Program
  • OCSEAP > Outer Continental Shelf Environmental Assessment Project
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.
Other 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]
Fees
  • free online download
Source Datasets
Lineage Statement Lineage varies by data source. Some data contributed, some coded at NGDC from technical reports.
Processing Environment Native Dataset Environment: ASCII text

Metadata Last Modified: 2014-06-11

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