Core Data from the Deep Sea Drilling Project
|On-line store||Free data download||All NGDC CD-ROM products|
NGDC DATA ANNOUNCEMENT NUMBER: 00-MGG-03
This CD-ROM includes the complete suite of digital sediment and hard rock data generated by the data management staff of the Deep Sea Drilling Project. The CD-ROM is produced by the National Geophysical Data Center as volume 1 of the new World Data Service for Geophysics, Boulder Seafloor Series.
The data files on this disc replace the sediment and hard rock data contained on disc 1 of the previous DSDP CD-ROM version 1.0 set. The new CD-ROM includes an HTML interface, replacing the old DOS and Macintosh access software. Data are available hole-by-hole in the original DSDP format and as tab-delimited files suitable for upload into most spreadsheet and database applications. Some data types are also offered in the old "browse" version for onscreen preview. The entire CD-ROM is also available for on-line viewing and data download (see link below).
|Age Profile||Paleomagnetism-Discrete Sediment|
|Carbon-Carbonate||Paleomagnetism-Hard Rock |
|Core Depth Recovery||Paleomagnetism-Long Core Spinner|
|Density-Porosity||Paleontology (22 fossil groups)|
|Hard Rock-Major Element Chemistry||Site Summary|
|Hard Rock-Minor Element Chemistry||Smear Slide Data|
|Hard Rock-Thin Section Descriptions||Sonic Velocity|
|Hard Rock-Visual Descriptions||Vane Shear|
|Interstitial Water Chemistry||Visual Core Descriptions|
History of the DSDP CD-ROM Project
During 16 years of operation by the Scripps Institution of Oceanography (SIO), the D/V GLOMAR CHALLENGER drilled over 1000 holes at 624 sites in the global ocean for the Deep Sea Drilling Project.The DSDP was an international project funded by the U.S. National Science Foundation and the governments of France, Japan, the United Kingdom, the former Federal Republic of Germany, and the former Union of Soviet Socialist Republics.
During the DSDP, the Data Management Group at SIO collected and organized a vast amount of marine geological, geophysical, and downhole logging data, and designed and compiled a suite of computerized data files. In 1987 final versions of all DSDP data files were forwarded to NGDC for archive and distribution to the public on request. Also at that time all geological and reference files were sent to Texas A&M University, science operator of the Ocean Drilling Program (ODP), successor of the DSDP, and copies of digital logs were sent to the Borehole Research Group of the Lamont-Doherty Earth Observatory, logging contractor for the ODP.
In 1989, with support from, and in cooperation with, the Joint Oceanographic Institutions, Inc./US Science Support Program (JOI/USSSP), through a contract with the U.S. National Science Foundation, the National Geophysical Data Center released all of the computerized DSDP data files in CD-ROM form with access software developed by NGDC. With the release of the CD-ROM data set, for the first time, any researcher with a personal computer and CD-ROM reader could access the full suite of computerized DSDP data compiled by the DSDP Data Management Group at SIO.
NGDC extensively checked, cleaned, indexed, and organized the DSDP data files for distribution on CD-ROM; decoded and produced a readable "browse" version of each fixed-field DSDP data file; and developed access software. Some x-ray mineralogy and logging data, previously not in standard digital form, were digitized and/or reformatted by the Woods Hole Oceanographic Institution under contract to JOI/USSSP for the CD-ROM data set.
In 2000, the supply of original DSDP CD-ROMs was exhausted, and NGDC developed the CD-ROM described in this announcement. Logging data in the standard 'LIS' format included with the old CD-ROM set are not included, logging data are available from either NGDC or the Borehole Research Group at the Lamont-Doherty Earth Observatory of Columbia University. Underway geophysical data in the international MGD77 format from the previous set are also not included; these data are available on NGDC's marine trackline geophysics CD-ROM set, updated regularly. Discs are in the standard ISO 9660 format, with an HTML interface, so they are usable in any computer environment able to access a CD-ROM with a web browser.