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Index to Marine and Lacustrine Geological Samples (IMLGS)

browse graphicimage of sea floor sample locations
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: Index to Marine and Lacustrine Geological Samples (IMLGS). NOAA National Centers for Environmental Information. doi:10.7289/V5H41PB8 [access date]
Online Access
  • Web forms interface (download)
    Text interface to search, view, and download data and images from the IMLGS database, the NCEI archive, and related sites.
  • Map viewer (search)
    ArcGIS interactive map interface to search and view information in the IMLGS and links to download related data and images.
  • Linked data interface (search)
    Offsite Linked Data interface (RDF graph) for Semantic Web access to the database, offered cooperatively on the Rolling Deck to Repository (R2R) server. (may not contain the latest data)
  • KMZ file (display)
    Compressed Keyhole Markup Language (KMZ) file produced annually by Grid-Arendal. Includes links to the database for data download from NCEI.
  • Open Data ArcGIS (search)
    Open Data ArcGIS interface enabling filtering, sorting, and export in multiple formats
  • Web Map Service (WMS) (display)
    Web Map Service Getcapabilities, how to use WMS to display sample locations.
  • Web Feature Service (WFS) (download)
    Web Feature Service Getcapabilities, how to use WFS to query the database.
Distribution Formats
  • ASCII (Version: UTF-8)
    • File Specification: American Standard Code for Information Interchange (ASCII) text format.
  • WMS (Version: 1.3.0)
    • File Specification: Open Geospatial Consortium Web Map Service
  • WFS (Version: 1.1.0)
    • File Specification: Open Geospatial Consortium Web Feature Service
  • KMZ (Version: 2.1)
    • File Specification: Keyhole Markup Language Compressed File
Distributor Distributor information not available
Dataset No POCs available for this dataset
General Documentation
  • Publisher's landing page
    How to cite this data set (doi:10.7289/V5H41PB8), all access options, and complete documentation.
  • Web page
    Web page of information about the database and the Curators group.
Associated Resources
  • publication: 1977-12-31
  • revision: 2015-10-09
Data Presentation Form: Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status On Going
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.
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.
Use Limitations
  • Produced by the NOAA National Centers for Environmental Information. Not subject to copyright protection within the United States.
  • Curators of Marine and Lacustrine Geological Samples Consortium
  • Antarctic Marine Geology Research Facility (AMGRF), Florida State University (FSU)
  • British Ocean Sediment Core Research Facility (BOSCORF), National Oceanography Centre
  • Geological Survey of Canada Atlantic (GSC A) Marine Geoscience Curation Facility
  • International Ocean Discovery Program (IODP)
  • Lamont-Doherty Core Repository (LDCR), Lamont-Doherty Earth Observatory, Columbia University
  • University of Rhode Island (URI) Graduate School of Oceanography (GSO), Marine Geological Samples Laboratory (MGSL)
  • University of Minnesota National Lacustrine Core Repository (LacCore)
  • Oregon State University (OSU) Marine Geology Repository (MGR)
  • Scripps Institution of Oceanography (SIO) Geological Collections
  • University of Hawaii at Manoa, School of Ocean and Earth Science and Technology (SOEST)
  • The Ohio State University Byrd Polar and Climate Research Center (BPCRC) Sediment Core Repository
  • The Ohio State University Byrd Polar and Climate Research Center (BPCRC) Polar Rock Repository
  • Universite de Savoie Laboratoire Environnements, Dynamiques et Territoires de la Montagne (EDYTEM)
  • U.S. Geological Survey (USGS) Coastal and Marine Geology Program (CMGP) Pacific Coastal and Marine Science Center (PCMSC)
  • U.S. Geological Survey (USGS) Coastal and Marine Geology Program (CMGP) St. Petersburg Coastal and Marine Science Center (SPCMSC)
  • U.S. Geological Survey (USGS) Coastal and Marine Geology Program (CMGP) Woods Hole Coastal and Marine Science Center (WHCMSC)
  • Woods Hole Oceanographic Institution (WHOI) Seafloor Samples Laboratory
  • Integrated Ocean Drilling Program (IODP)(past partner)
  • Ocean Drilling Program (ODP)(past partner)
  • Deep Sea Drilling Project (DSDP)(past partner)
  • Alfred-Wegener-Institut (AWI) (currently inactive)
  • GEOMAR Helmholtz Centre for Ocean Research Kiel (currrently inactive)
  • NOAA Atlantic Oceanographic and Meteorological Laboratories (AOML) Core Repository (closed)
  • NOAA Pacific Marine Environmental Laboratory (PMEL) (currently inactive)
  • Rosenstiel School of Marine and Atmospheric Science (RSMAS) Department of Marine Geosciences (currently inactive)
  • University of Southern California (USC) Department of Earth Sciences (currently inactive)
  • University of Texas at Austin (UT) Institute of Geophysics (currently inactive)
  • University of Wisconsin-Madison Department of Geoscience (currently inactive)
  • Smithsonian National Museum of Natural History (NMNH)(NOS hydrographic survey samples only)
  • University of Washington Core Repository (closed, collection moved to Oregon State University)
  • National Science Foundation (NSF)
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Time Period: 1885-04-01T00:23:00.000Z to Present
Spatial Reference System:
Spatial Bounding Box Coordinates:
N: 90
S: -88.367
E: 180
W: -180
Spatial Coverage Map:
Theme keywords
  • Databases
  • Scientific archives
  • Electronic records
  • Oceanography
  • Ocean bottom
  • Geology
  • Submarine geology
  • Marine sediments
  • Marine geology
  • Rock and sediment lithology and mineralogy
  • Sea-floor characteristics
  • lacustrine sediments
  • EARTH SCIENCE > Oceans > Marine Sediments
  • EARTH SCIENCE > Oceans > Marine Sediments > Sediment Composition
  • EARTH SCIENCE > Paleoclimate > Ocean/Lake Records > Sediments
Platform keywords
  • In Situ Ocean-based Platforms > SHIPS
Instrument keywords
  • In Situ/Laboratory Instruments > Corers > CORING DEVICES
  • In Situ/Laboratory Instruments > Samplers > DREDGING DEVICES
  • In Situ/Laboratory Instruments > Samplers > Grabbers/Traps/Collectors > GRAB SAMPLERS
  • In Situ/Laboratory Instruments > Corers > ROCK CORERS
  • In Situ/Laboratory Instruments > Corers > SEDIMENT CORERS
  • In Situ/Laboratory Instruments > Samplers > Trawls/Nets > BOTTOM TRAWL
Place keywords
        Use Constraints
        • Please consult with Curator before proposing to do research on any sample discovered through the IMLGS.
        • 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.
        Access Constraints
        • Sample metadata and most data/images are available online for free download. Additional, full-resolution images from the offline archive may be available. Contact NCEI for more information.
        Other Constraints cite as: Curators of Marine and Lacustrine Geological Samples Consortium: Index to Marine and Lacustrine Geological Samples (IMLGS). NOAA National Centers for Environmental Information. doi:10.7289/V5H41PB8 [access date]
        • free for online download
        Lineage information for: dataset
        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.
        Processing Environment
        Source Datasets
        Lineage information for: Scope not available.
        Acquisition Information (collection)
        Last Modified: 2015-12-31
        For questions about the information on this page, please email: