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Crustal Ages of the Ocean Floor - Poster

The Crustal Ages of the Ocean Floor Poster was created at NGDC using the Crustal Ages of the Ocean Floor database draped digitally over a relief of the ocean floor database. The Crustal Ages of the Ocean Floor database was created by a consortia of marine scientists including Dr. R. Dietmar Muller, Dept. of Geology and Geophysics, University of Sydney, Australia, Dr. Walter R. Roest, Geological Survey of Canada, Ottawa, Canada, Dr. Jean-Yves Royer, Lab. de Geodynamique, Villefranche Sur Mer, France, Dr. Lisa M. Gahagan, Institute for Geophysics, University of Texas, Austin, Texas, and Dr. John G. Sclater, Scripps Institution of Oceanography, La Jolla, California. This version of the age grid is based on the geomagnetic time scale of Cande and Kent (1995) for magnetic anomalies younger than chron 34 (83.5 Ma), and on the time scale from Gradstein et al, (1994) for older times. The grid node interval is 6 arc-minutes using a self- consistent set of global isochrons and associated plate reconstruction poles. The age of each grid node was determined by linear interpolation between adjacent isochrons in the direction of spreading. Ages for ocean floor between the oldest identified magnetic anomalies and continental crust were interpolated by estimating the ages of passive continental margin segments from geological data and published plate models. The gridded ages of the ocean floor are based on a digital set of isochrons. The isochrons are based on a large number of marine magnetic anomaly data, satellite altimetry data, and a self- consistent plate model. The finite rotation poles that the isochrons are based on and the references to the magnetic anomaly and fracture zone data are documented in the: University of Texas Institute for Geophysics Technical Report No. 117, 1992, "A global isochron chart" by J.-Y. Royer, R.D. Muller, L.M. Gahagan, L.A. Lawver, C.L. Mayes, D. Nurnberg, and J.G. Sclater. Digital age and error grids, files of continent-ocean boundaries and present day plate boundaries, a C-program to adapt the grid to new timescales, can be obtained from public ftp sites in North America and Australia.

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    Distribution Formats
    • Poster
    Distributor Distributor information not available
    No point of contact available for this dataset
    Documentation links not available.
    • CA/NRCAN/ESS/GSC>Geological Survey of Canada, Earth Sciences Sector, Natural Resources Canada
    • publication: 1996-01-01
    Edition: First
    Dataset Progress Status Complete
    Data Update Frequency:
    Purpose: Research, Public Interest, Education
    Use Limitations
    • 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.
    Time Period: 1996-05-31  to  1996-05-31
    Spatial Bounding Box Coordinates:
    N: 90.0
    S: -90.0
    E: 180.0
    W: -180.0
    Spatial Coverage Map:
    • EARTH SCIENCE>SOLID EARTH>Rocks/Minerals>Age Determinations
    • EARTH SCIENCE>OCEANS>Marine Geophysics>Seafloor Spreading
    • EARTH SCIENCE>SOLID EARTH>Geomagnetism>Paleomagnetism
    • EARTH SCIENCE>SOLID EARTH>Rocks/Minerals>Age Determinations
    • EARTH SCIENCE>SOLID EARTH>Geodetics/Gravity>Crustal Motion
    • Ocean Crust
    • Geologic Age
    • Ocean Floor Samples
    • Plate Tectonics
    • Earth Science>Interior & Crust
    Data Centers
    • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
    • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
    • Global
    • Sea Floor
    Use Constraints
    • Use Constraints: None
    Access Constraints
    • Access Constraints: No Constraints
    • Depends on the Data Set
    Lineage Statement Lineage statement not available.

    Metadata Last Modified: 2015-09-01

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