Index to Marine and Lacustrine Geological Samples (IMLGS)
The Index to Marine and Lacustrine Geological Samples (IMLGS) describes and provides
access to ocean floor and lakebed rock and sediment samples curated by participating
institutional and government repositories in the U.S., Canada, the United Kingdom,
France, and Germany. Material from most samples may be requested from the responsible
Curator for scientific research, using contact information provided in IMLGS data
listings. Each curatorial facility prepares data on their own collection for the IMLGS.
Minimum information includes platform, cruise, sample id, sampling device, and latitude/longitude.
Water depth, collection date, storage method, and principal investigator are usually
included. Core dimensions and depth to top and bottom of interval is available for
many core samples. Descriptions, comments, physiographic province, lithology, texture,
mineralogy, other components, glass remarks, weathering information, and geologic
age are included for some samples. An International GeoSample Identifiers (IGSN) is
included, where known. Links are provided to related data and images at NCEI, partner
institutions, and to other sources of information including the System for Earth SAmple
Registration (SESAR) and the Rolling Deck to Repository (R2R). The IMLGS includes
information about over 207,935 discrete sea floor and lakebed cores, grabs, dredges,
and drill holes worldwide, as of December 7, 2015. The database was designed by a
group of Curators, in cooperation with NGDC (now NCEI), at a series of meetings sponsored
by the U.S. National Science Foundation (NSF) beginning in 1977. The Curators group
continues to meet biennially to share best practices and oversee the IMLGS database.
- Cite as: Curators of Marine and Lacustrine Geological Samples Consortium. 1977: Index to Marine and Lacustrine Geological Samples (IMLGS). NOAA National Centers for Environmental Information. https://doi.org/10.7289/V5H41PB8. Accessed [date]
- doi:10.7289/V5H41PB8
- NCEI Metadata ID: gov.noaa.ngdc.mgg.geology:G00028
gov.noaa.ngdc.mgg.geology:G00028
Search Data |
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Download Data |
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Distribution Formats |
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Ordering Instructions | Contact NCEI for other distribution options and instructions. |
Distributor | NOAA National Centers for Environmental Information ncei.info@noaa.gov |
Dataset Point of Contact | NOAA National Centers for Environmental Information ncei.info@noaa.gov |
Dataset Point of Contact | Marine Geology Data Manager NOAA National Centers for Environmental Information geology.info@noaa.gov |
Coverage Description | Global ocean sea floor and lakebeds |
Time Period | 1885-04-01T00:23:00.000Z to Present |
Spatial Reference System | urn:ogc:def:crs:EPSG:4326 |
Spatial Bounding Box Coordinates |
N: 90
S: -88.367
E: 180
W: -180
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Spatial Coverage Map |
General Documentation |
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Associated Resources |
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Publication Dates |
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Data Presentation Form | Digital table - digital representation of facts or figures systematically displayed,
especially in columns |
Dataset Progress Status | Ongoing - data is continually being updated Historical archive - data has been stored in an offline storage facility |
Data Update Frequency | Irregular - Partner repositories contribute updates as new samples are added to their collections. Some former partner repositories no longer contribute new data. |
Supplemental Information |
Quality control: Descriptions and metadata are created by the curating facility, which
is responsible for the accuracy of the information. Coded entries are checked on receipt
by the National Centers for Environmental Information for gross errors in coded fields.
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Purpose | The purpose of the IMLGS is to promote new research on existing sea floor and lakebed cores, grabs, dredges, and drill samples by helping researchers find samples curated by participating geosample repositories. Geosamples are invaluable cross-disciplinary, resources. Their uses include, but are not limited to understanding past climate change, the impact of benthic habitat on fisheries and other biological communities, pollution patterns, geohazards, and other Earth systems and processes. Geological samples can also assist in siting offshore structures, locating strategic offshore mineral resources, and providing ground-truth for remotely sensed/geophysical measurements. |
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Publishers |
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Acknowledgments |
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Theme keywords | Library of Congress Subject Headings
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Data Center keywords | Global Change Master Directory (GCMD) Data Center Keywords
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Platform keywords | Global Change Master Directory (GCMD) Platform Keywords
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Instrument keywords | Global Change Master Directory (GCMD) Instrument Keywords
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Place keywords | Global Change Master Directory (GCMD) Location Keywords
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Project keywords | Global Change Master Directory (GCMD) Project Keywords
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Use Constraints |
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Access Constraints |
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Other Constraints | Cite as: Curators of Marine and Lacustrine Geological Samples Consortium. 1977: Index to Marine and Lacustrine Geological Samples (IMLGS). NOAA National Centers for Environmental Information. https://doi.org/10.7289/V5H41PB8. Accessed [date] |
Fees |
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Lineage Statement | Data are received on a continuing basis from the participating repositories. Incoming data are checked for adherence to controlled vocabularies, illegal data types in numeric fields, and out of range latitudes/longitudes. NCEI adds IGSNs/links to related resources, where known, and may perform cursory visual inspection of data for reasonableness, asking the originator for guidance on discrepancies. Preliminary processed data are placed in a test database for inspection by the originator, and iteratively corrected until the originator approves their publication to the production database. Data may also be updated/corrected at any time, at the originator's request. |
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Processing Environment | Native Dataset Environment: database tables Technical Prerequisites: Contact data center for information |
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Last Modified: 2020-04-21
For questions about the information on this page, please email: ncei.info@noaa.gov