The NGDC Seafloor Sediment Grain Size Database
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dateStamp: 2020-04-21
metadataStandardName: ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
metadataStandardVersion: ISO 19115-2:2009(E)
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title: European Petroleum Survey Group (EPSG) Geodetic Parameter Registry
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date: 2008-11-12
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title: The NGDC Seafloor Sediment Grain Size Database
date: (CI_Date)
date: 1976-12-31
dateType: (CI_DateTypeCode) publication
date: (CI_Date)
date: 2000-12-31
dateType: (CI_DateTypeCode) revision
edition: First Version
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title: International DOI Foundation (IDF)
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Anchor: DOI doi:10.7289/V5G44N6W
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name: Marine Geology and Geophysics (MGG)
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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.
purpose: environmental research
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.
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country: USA
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keyword: Scientific archives
keyword: Electronic records
keyword: Oceanography
keyword: Ocean bottom
keyword: Geology
keyword: Submarine geology
keyword: Marine sediments
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keyword: Earth Science > Oceans > Marine Sediments
keyword: Earth Science > Paleoclimate > Ocean/Lake Records > Sediments
keyword: Earth Science > Oceans > Marine Sediments > Sedimentary Textures
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keyword: DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
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keyword: Geographic Region > Global Ocean
keyword: Vertical Location >Sea Floor
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resourceConstraints: (MD_LegalConstraints)
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otherConstraints: Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
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otherConstraints: Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
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otherConstraints: Cite as: National Geophysical Data Center. 1976: The NGDC Seafloor Sediment Grain Size Database. First Version. NOAA National Centers for Environmental Information. https://doi.org/10.7289/V5G44N6W. Accessed [date].
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useLimitation: Produced by the NOAA National Centers for Environmental Information. Not subject to copyright protection within the United States.
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otherConstraints: 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.
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linkage: https://www.ngdc.noaa.gov/idb/struts/form?dataset=101477&search_look=1&display_look=1&le_0=90&ge_0=-90&ge_1=-180&le_1=180
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title: The NGDC Seafloor Sediment Geotechnical Properties Database
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date: 1976-12-31
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Anchor: DOI doi:10.7289/V56Q1V55
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otherCitationDetails: National Geophysical Data Center (1976): The NGDC Seafloor Sediment Geotechnical Properties Database. NOAA National Centers for Environmental Information. doi:10.7289/V56Q1V55
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title: NCEI Marine Geology Data Archive
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date: 1977-12-31
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title: NOAA/NCEI Marine Geology WAF
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spatialResolution: (missing) (MD_Resolution)
levelOfDetail: Vertical resolution is 1 meter and horizontal resolution is .001 degree.
language:
LanguageCode: eng; USA
characterSet: (MD_CharacterSetCode) UTF8
topicCategory: (MD_TopicCategoryCode) geoscientificInformation
topicCategory: (MD_TopicCategoryCode) oceans
environmentDescription: Native Dataset Environment: ASCII text
extent: (EX_Extent)
description: Global Ocean
geographicElement: (EX_GeographicBoundingBox)
westBoundLongitude: -180
eastBoundLongitude: 180
southBoundLatitude: -78.3667
northBoundLatitude: 81.0705
temporalElement: (EX_TemporalExtent)
extent:
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description: Sampling Dates
beginPosition: 1956-01-01
endPosition: 2000-12-31
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minimumValue:
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maximumValue:
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supplementalInformation: 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.
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contentInfo: (MD_CoverageDescription)
attributeDescription:
RecordType: The Latitude and Longitude (point) from which a sample of sediment or rock was collected from the sea floor or a lakebed.
contentType: (MD_CoverageContentTypeCode) point
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sequenceIdentifier:
MemberName:
aName: Latitude
attributeType: (unknown)
descriptor: Distance measured north or south from the equator. Distance north is positive, distance south is negative.
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minValue:
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units:
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identifier: decimal degrees
name: decimal degrees
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aName: Longitude
attributeType: (unknown)
descriptor: Longitude is measured from the Prime Meridian (which is the north/south line that runs through Greenwich, England), values measured east are positive and values measured west are negative.
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minValue:
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units:
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identifier: decimal degrees
name: decimal degrees
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contentInfo: (MD_CoverageDescription)
attributeDescription:
RecordType: Information about the location from which a sample of sediment or rock was collected from the sea floor or a lakebed.
contentType: (MD_CoverageContentTypeCode) physicalMeasurement
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sequenceIdentifier:
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aName: Water Depth Meters
attributeType: (unknown)
descriptor: The depth from the surface of the water to the sea floor or lakebed at the location where a measurement was taken or sample collection was begun.
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minValue:
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units:
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identifier: corrected meters
name: corrected meters
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contentInfo: (MD_CoverageDescription)
attributeDescription:
RecordType: Weight percent of particles within a specified size range.
contentType: (MD_CoverageContentTypeCode) physicalMeasurement
dimension: (MD_Band)
sequenceIdentifier:
MemberName:
aName: weight percent
attributeType: (unknown)
descriptor: Percentage, by weight, of the particles from a sample or subsample that falls within a specified particle size range. The range may be expressed in milimeters or phi as inidcated in the dataset.
maxValue:
Real: 0
minValue:
Real: 100
units: (unknown)
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contentInfo: (MD_FeatureCatalogueDescription)
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includedWithDataset: true
featureTypes:
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featureCatalogueCitation: (CI_Citation)
title: Format 073
date: (CI_Date)
date: 1976-12-31
dateType: (CI_DateTypeCode) creation
date: (CI_Date)
date: 1980-12-31
dateType: (CI_DateTypeCode) revision
otherCitationDetails: Entities and attributes are completely described in a text file accompanying the datasets on download.
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fees: In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.
orderingInstructions: Contact NCEI for other distribution options and instructions.
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linkage: https://doi.org/10.7289/V5G44N6W
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linkage: https://www.ngdc.noaa.gov/mgg_grainsize/index.jsp
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description: Download entire data set as delimited ASCII text (no search/subset), one file each for cruise, sample, interval, and phi-level information.
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nameOfMeasure: Reliability
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evaluationMethodDescription: 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.
result: (unknown)
lineage: (LI_Lineage)
statement: 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.
processStep: (LI_ProcessStep)
description: Last data processed into database
dateTime:
DateTime: 2000-12-31T00:00:00
source: (LI_Source)
description: multiple investigators, institutions, and funding sources, many under contracts of the Bureau of Land Management Outer Continental Shelf Program (BLM/OCS) or Outer Continental Shelf Environmental Assessment Program (OCSEAP). Several projects/programs were wholly or partially funded by NOAA.
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dataQualityInfo: (DQ_DataQuality)
scope: (DQ_Scope)
level: (MD_ScopeCode) repository
levelDescription: (MD_ScopeDescription)
other: NOAA National Centers for Environmental Information
lineage: (LI_Lineage)
processStep: (LE_ProcessStep)
description: NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
dateTime:
DateTime: 2015-04-22T00:00:00
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metadataMaintenance: (MD_MaintenanceInformation)
maintenanceAndUpdateFrequency: (MD_MaintenanceFrequencyCode) asNeeded
maintenanceNote: Modified for compliance to NCEI Template v1.2.
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acquisitionInformation: (MI_AcquisitionInformation)
instrument: (MI_Instrument)
identifier: (MD_Identifier)
code: In Situ/Laboratory Instruments
type: instrument
description: Instrument Type: Sea floor and lakebed geologic sampling (coring, drilling, dredging, trawling, and/or grab sampling devices) and/or in situ measurements (cameras, visual observations, and/or recorders/loggers)
platform: (MI_Platform)
identifier: (MD_Identifier)
code: In Situ Ocean-based Platforms > SHIPS
description: Various ocean-based and lake-based ships, boats, remotely operated vehicles, submersibles, and other unspecified types of platforms
instrument: (inapplicable)