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General Information
File Identifier: gov.noaa.ngdc.mgg.geology:G00028
Metadata Date Stamp: 2015-12-31
Identification Information
Title: Index to Marine and Lacustrine Geological Samples (IMLGS)
Dataset Publication Date: 1977-12-31
Abstract: 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.
Credit Curators of Marine and Lacustrine Geological Samples Consortium, U.S. National Science Foundation, and NOAA National Centers for Environmental Information.
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]
Data Type: point
Browse Graphic
Browse Graphic URL:
Browse Graphic Caption: image of sea floor sample locations
Browse Graphic Type: PNG
Data Theme
Theme Topics: Geological and Geophysical, Oceans and Estuaries
Spatial Domain
West Bounding Longitude: -180
South Bounding Latitude: -88.367
East Bounding Longitude: 180
North Bounding Latitude: 90
Zoom to the resource envelope
Beginning Date: 1885-04-01T00:23:00.000Z
Data Quality Information
Scope (quality information applies to): Dataset
Data History: 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.
Distribution Information
Format Name: ASCII
Format Version: UTF-8
Distribution Link:
Distribution Link Function: Information
Metadata Reference Information
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