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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 sea floor and lakebed rock and sediment samples curated by participating institutional and government repositories in the U.S., Canada, the United Kingdom, 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 NGDC, 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 over 500,000 records describing approximately 201,120 discrete sea floor and lakebed cores, grabs, dredges, and drill holes worldwide, as of April, 2014. The database was designed by a group of Curators, in cooperation with NGDC, 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 (2013): Index to Marine and Lacustrine Geological Samples (IMLGS). National Geophysical Data Center, NOAA. doi:10.7289/V5H41PB8 [access date]

Online Access
Distribution Formats
  • In addition to web services and online browse and download of ASCII data and information from the IMLGS database, and links to browse and download related images and analyses, data is also available in KML form, as Linked Data (via R2R) and in other custom formats, including shapefiles on request.
  • ASCII Version: UTF-8
  • WMS Version: 1.3.0
  • WFS Version: 1.1.0
  • KMZ Version: 2.1
Distributor DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
No POCs available for this dataset
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. Geologic samples 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. Geologic samples can also assist in siting offshore structures, locating strategic offshore mineral resources, and providing ground-truth for remotely sensed/geophysical measurements.
Originator
  • Multiple Institutions
Date(s)
  • publication: 1977-12-31
  • revision: 2014-04-18
Data Presentation Form: Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status On Going
Data Update Frequency: Continual
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 Geophysical Data Center for gross errors in coded fields.
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
  • EARTH SCIENCE > Oceans > Marine Sediments
  • EARTH SCIENCE > Oceans > Marine Sediments > Sediment Composition
  • EARTH SCIENCE > Paleoclimate > Ocean/Lake Records > Sediments
  • EARTH SCIENCE > Solid Earth > Rocks/Minerals > Sediments
  • EARTH SCIENCE > Solid Earth > Rocks/Minerals > Age Determinations
  • EARTH SCIENCE > Solid Earth > Rocks/Minerals > Igneous Rocks
  • EARTH SCIENCE > Solid Earth > Rocks/Minerals > Metamorphic Rocks
  • EARTH SCIENCE > Solid Earth > Rocks/Minerals > Sedimentary Rocks
  • INFOTERRA > Subject Disciplines > Marine Geology > Marine Geology
  • DATA ANALYSIS AND VISUALIZATION > GEOGRAPHIC INFORMATION SYSTEMS > WEB-BASED GEOGRAPHIC INFORMATION SYSTEMS
  • DATA MANAGEMENT/DATA HANDLING > DATA SEARCH AND RETRIEVAL
  • DATA ANALYSIS AND VISUALIZATION > VISUALIZATION/IMAGE PROCESSING
Data Center Keywords
  • WDC/MGG, BOULDER > World Data Service for Geophysics, Boulder
  • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Instrument Keywords
  • CORING DEVICES
  • DREDGING DEVICES
  • GRAB SAMPLERS
  • ROCK CORERS
  • SEDIMENT CORERS
  • BOTTOM TRAWLS
Place keywords
  • Geographic Region > Global Ocean
  • Vertical Location > Sea Floor
  • Ocean > Arctic Ocean
  • Ocean > Atlantic Ocean
  • Ocean > Indian Ocean
  • Ocean > Pacific Ocean
  • Ocean > Southern Ocean
Platform keywords
  • OCEAN PLATFORMS
  • SHIPS > SHIPS
Project keywords
  • IMLGS
Use Limitations
  • Produced by the NOAA National Geophysical Data Center. Not subject to copyright protection within the United States.
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 NGDC for more information.
Other Constraints cite as: Curators of Marine and Lacustrine Geological Samples Consortium (2013): Index to Marine and Lacustrine Geological Samples (IMLGS). National Geophysical Data Center, NOAA. doi:10.7289/V5H41PB8 [access date]
Lineage Statement Data are received on a continuing basis from the originating repositories
Source Datasets

Last Modified: 2014-04-18

For questions about the information on this page, please email: ngdc.metadata-support@noaa.gov