Index to Marine and Lacustrine Geological Samples (IMLGS)Back to Collection NOAA/NESDIS/NGDC/MGG/Geology
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Index to Marine and Lacustrine Geological Samples (IMLGS)
browse graphicThe 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.

Get the Data
AccessFormat(s)Distributor(s) / Contact InfoInstructions / Constraints
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.
Web forms interface
Text interface to search, view, and download data and images from the IMLGS database, the NCEI archive, and related sites.
Map viewer
ArcGIS interactive map interface to search and view information in the IMLGS and links to download related data and images.
Linked data interface
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
Compressed Keyhole Markup Language (KMZ) file produced annually by Grid-Arendal. Includes links to the database for data download from NCEI.
Open Data ArcGIS
Open Data ArcGIS interface enabling filtering, sorting, and export in multiple formats
Web Map Service (WMS)
Web Map Service Getcapabilities, how to use WMS to display sample locations.
Web Feature Service (WFS)
Web Feature Service Getcapabilities, how to use WFS to query the database.
Format version: UTF-8
Format specification: American Standard Code for Information Interchange (ASCII) text format.
Format version: 1.3.0
Format specification: Open Geospatial Consortium Web Map Service
Format version: 1.1.0
Format specification: Open Geospatial Consortium Web Feature Service
Format version: 2.1
Format specification: Keyhole Markup Language Compressed File
free for online download

Ordering Instructions
Data are also available in other custom formats, including shapefiles on request.

Use Limitation
Produced by the NOAA National Centers for Environmental Information. Not subject to copyright protection within the United States.

Legal Constraints
Citation Recommendation: 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]

Use Limitation

Please consult with Curator before proposing to do research on any sample discovered through the IMLGS.


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.

Use Limitation

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.

Security Constraints