ISO Table View Back to Collection NOAA/NESDIS/NGDC/MGG/Geology
View Metadata As: Get Data, FAQ, HTML, 19139 XML
Assess Metadata For: Completeness, DOI Readiness, CSW Readiness, Components

Metadata Identifier: gov.noaa.ngdc.mgg.geology:G04150

Aggregation Info | Bands | Citations | Constraints | Coverage Descriptions | Dimensions | Extents | Formats | Geographic Bounding Box
Georectified Information | Georeferenceable Information | Identifiers | Instruments | Mediums | OnlineResources | Operations
Platforms | Process Steps | Range Elements | Reference Systems | Responsible Parties | Series | Sources | Spatial Grids | Temporal Extents

MD_DataIdentification

Count Component Title Abstract
1 Age, spreading rates, and spreading asymmetry of the world's ocean crust The authors present four companion digital models of the age, age uncertainty, spreading rates and spreading asymmetries of the world's ocean basins as geographic and Mercator grids with 2 minute resolution. The grids include data from all the major ocean basins as well as detailed reconstructions of back-arc basins. The age, spreading rate and asymmetry at each grid node is determined by linear interpolation between adjacent seafloor isochrons in the direction of spreading. Ages for ocean floor between the oldest identified magnetic anomalies and continental crust are interpolated by geological estimates of the ages of passive continental margin segments. The age uncertainties for grid cells coinciding with marine magnetic anomaly identifications, observed or rotated to their conjugate ridge flanks, are based on the difference between gridded age and observed age. The uncertainties are also a function of the distance of a given grid cell to the nearest age observation, and the proximity to fracture zones or other age discontinuities. Asymmetries in crustal accretion appear to be frequently related to asthenospheric flow from mantle plumes to spreading ridges, resulting in ridge jumps towards hotspots. The authors also use the new age grid to compute global residual basement depth grids from the difference between observed oceanic basement depth and predicted depth using two alternative age-depth relationships. The new set of grids helps to investigate prominent negative depth anomalies, which may be alternatively related to subducted slab material descending in the mantle or to asthenospheric flow. A combination of these digital grids and the associated relative and absolute plate motion model with seismic tomography and mantle convection model outputs represent a valuable set of tools to investigate geodynamic problems.
Top

SV_Identification

none found
Top

CI_Citation

Count Component Title Date Citation Identifier
1 Age, spreading rates, and spreading asymmetry of the world's ocean crust
    2008-12-31
    2008-12-31
doi:10.1029/2007GC001743
1 Documentation
    2008-12-31
1 European Petroleum Survey Group (EPSG) Geodetic Parameter Registry
    2008-11-12
1 NASA/GCMD Instrument Keywords Global Change Master Directory (GCMD) Instrument Keywords
    2017-04-24
1 NASA/GCMD Location Keywords Global Change Master Directory (GCMD) Location Keywords
    2017-04-24
1 NASA/GCMD Platform Keywords Global Change Master Directory (GCMD) Platform Keywords
    2017-04-24
1 NASA/GCMD Project Keywords Global Change Master Directory (GCMD) Project Keywords
    2017-04-24
1 NASA/GCMD Science Keywords Global Change Master Directory (GCMD) Science Keywords
    2017-04-24
1 Library of Congress Subject Headings Library of Congress Subject Headings
    1 NASA/GCMD Data Center Keywords NASA/GCMD Data Center Keywords
      2015-03-01
      1995-04-24
    1 NASA/Global Change Master Directory (GCMD) Platform Keywords NASA/Global Change Master Directory (GCMD) Platform Keywords
      2008-02-05
    1 NOAA/NCEI Marine Geology WAF
      2015-10-05
    NOAA/NCEI Marine Geology WAF
    Unresolved Xlinks
    SeaDataNet Common Vocabularies at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:descriptiveKeywords[3]/gmd:MD_Keywords[1]/gmd:thesaurusName[1]
    Top

    CI_Series

    Count Component Name Issue Identification Page
    1 Geochemistry, Geophysics, Geosystems Volume 9, Issue 4, April 2008
    Top

    CI_ResponsibleParty

    Count Component Individual Organization Position Email Role Linkage
    8 GCMD Landing Page https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
    1 Carmen Gaina Center for Geodynamics, Geological Survey of Norway, Trondheim, Norway originator
    1 NCEI (publisher) DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce publisher
    1 Marine Geology Data Manager - distributor - DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce Data Manager geology.info@noaa.gov distributor
    1 EarthByte Group, School of Geosciences, University of Sydney, Australia publisher
    1 European Petroleum Survey Group http://www.epsg-registry.org/
    1 Maria Sdrolias EarthByte Group, School of Geosciences, University of Sydney, Australia originator
    2 GCMD User Support Office NASA GCMD User Support Office gcmduso@gcmd.gsfc.nasa.gov publisher http://gcmd.nasa.gov/MailComments/MailComments.jsf?rcpt=gcmduso
    1 National Centers for Environmental Information, NOAA author
    1 R. Dietmar Muller School of Geosciences, University of Sydney, Australia originator
    1 resourceProvider - US Library of Congress US Library of Congress resourceProvider http://id.loc.gov/authorities/subjects
    1 Walter R. Roest Departement Geosciences Marines, Plouzane, France originator
    Unresolved Xlinks
    pointOfContact - DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce at: /gmi:MI_Metadata/gmd:contact[1]
    pointOfContact - DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:pointOfContact[1]
    custodian - DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce at: /gmi:MI_Metadata/gmd:metadataMaintenance[1]/gmd:MD_MaintenanceInformation[1]/gmd:contact[1]
    Top

    CI_OnlineResource

    Count Component Linkage Name Description Function
    2 http://gcmd.nasa.gov/MailComments/MailComments.jsf?rcpt=gcmduso GCMD Feedback Form Have a Comment for the GCMD? information
    1 http://id.loc.gov/authorities/subjects Library of Congress Subject Headings (LCSH) The Library of Congress Subject Headings (LCSH) are part of a Linked Data Service, actively maintained since 1898 to catalog materials held at the Library of Congress. information
    1 http://www.earthbyte.org/Resources/agegrid2008.html http://www.earthbyte.org/Resources/agegrid2008.html Alternate download from the originator. download
    1 http://www.epsg-registry.org/ European Petroleum Survey Group Geodetic Parameter Dataset Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured dataset of Coordinate Reference Systems and Coordinate Transformations. search
    1 https://data.noaa.gov/harvest/850a876a-3f44-456f-9599-430b9b10b34d Marine geology data sets in data.noaa.gov from NOAA/NCEI More marine geology data sets in data.noaa.gov stewarded by NOAA/NCEI. search
    7 https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information
    1 https://www.ngdc.noaa.gov/mgg/ocean_age/ocean_age_2008.html https://www.ngdc.noaa.gov/mgg/ocean_age/ocean_age_2008.html NGDC Web page of information about the data set with links to download data and documentation from NCEI. information
    Top

    MD_Identifier or RS_Identifier

    Count Component Code
    1 In Situ Ocean-based Platforms > SHIPS
    1 In Situ/Laboratory Instruments
    2 NOAA/NCEI Marine Geology WAF
    1 doi:10.1029/2007GC001743
    1 urn:ogc:def:crs:EPSG:4326
    Top

    EX_Extent

    Bounding Box Temporal Extent
    Count Component Description West East North South Start End
    1 Global sea floor -180.0 180.0 90.0 -90.0 2008-12-31 2008-12-31
    Unresolved Xlinks
    #boundingExtent at: /gmi:MI_Metadata/gmd:dataQualityInfo[1]/gmd:DQ_DataQuality[1]/gmd:scope[1]/gmd:DQ_Scope[1]/gmd:extent[1]
    Top

    EX_GeographicBoundingBox

    Count Component West East North South
    1 -180.0 180.0 90.0 -90.0
    Top

    EX_TemporalExtent

    Count Component Start End
    1 2008-12-31 2008-12-31
    Top

    MD_Format

    Count Component Name Version specification
    1 ASCII UTF-8 American Standard Code for Information Interchange (ASCII) text format.
    Top

    MD_Medium

    none found
    Top

    MD_Constraints

    Count Component Use Limitation
    1 NCEI Copyright Statement Produced by the NOAA National Centers for Environmental Information. Not subject to copyright protection within the United States.
    Top

    MD_ReferenceSystem

    Count Component Code Authority Title
    1 European Petroleum Survey Group (EPSG) Geodetic Parameter Registry urn:ogc:def:crs:EPSG:4326 European Petroleum Survey Group (EPSG) Geodetic Parameter Registry
    Top

    MD_GridSpatialRepresentation

    none found
    Top

    MD_Georeferenceable or MI_Georeferenceable

    none found
    Top

    MD_Georectified or MI_Georectified

    none found
    Top

    MD_Dimension

    none found
    Top

    MD_CoverageDescription or MI_CoverageDescription

    Count Component Attribute Description Content Type
    1 digital model of age, age uncertainty, spreading rate, and spreading asymmetries
    Top

    MD_Band or MI_Band

    Count Component Identifier Descriptor
    1 gridded age Ages for ocean floor between the oldest identified magnetic anomalies and continental crust are interpolated by geological estimates of the ages of passive continental margin segments.
    1 gridded age uncertainty The age uncertainties for grid cells coinciding with marine magnetic anomaly identifications, observed or rotated to their conjugate ridge flanks, are based on the difference between gridded age and observed age. The uncertainties are also a function of the distance of a given grid cell to the nearest age observation, and the proximity to fracture zones or other age discontinuities.
    1 gridded spreading rate Rate of accretion of ocean crust.
    1 gridded spreading asymmetries Asymmetries in crustal accretion appear to be frequently related to asthenospheric flow from mantle plumes to spreading ridges, resulting in ridge jumps towards hotspots.
    Top

    MI_RangeElementDescription

    none found
    Top

    MD_AggregateInformation

    Count Component Title Code Association Type Code
    1 NOAA/NCEI Marine Geology WAF NOAA/NCEI Marine Geology WAF NOAA/NCEI Marine Geology WAF crossReference
    Top

    LE_Source or LI_Source

    Count Component Title Date Description
    1 Unknown Dietmar Muller
    Top

    LE_ProcessStep or LI_ProcessStep

    Count Component DateTime Description
    1 2008-12-31T00:00:00 Received data from originator
    1 2015-04-22T00:00:00 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.
    Top

    MI_Operation

    none found
    Top

    MI_Platform

    Count Component Code Description
    1 In Situ Ocean-based Platforms > SHIPS In Situ Ocean-based Platforms > SHIPS Various ocean-based and lake-based ships, boats, remotely operated vehicles, submersibles, and other unspecified types of platforms
    Unresolved Xlinks
    In Situ Ocean-based Platforms > SHIPS at: /gmi:MI_Metadata/gmi:acquisitionInformation[1]/gmi:MI_AcquisitionInformation[1]/gmi:platform[1]
    Top

    MI_Instrument

    Count Component Code Type Description
    1 In Situ/Laboratory Instruments In Situ/Laboratory Instruments instrument
    Top