|Index to Marine and Lacustrine Geological Samples (IMLGS)
||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 203,000 discrete sea floor and lakebed
cores, grabs, dredges, and drill holes worldwide, as of April, 2015. 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.