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The National Lacustrine Core Repository (LacCore), operated by the University of Minnesota
is a partner in the Index to Marine and Lacustrine Geological Samples (IMLGS) database,
contributing information to the IMLGS to help researchers discover geological samples
curated in their facility. The partner repository also sends related data, documents,
and imagery to NCEI for long-term archive, but the originating institution is the
definitive source of information related to their sample collection. LacCore has operated
the National Lacustrine Core Repository since 2000, and now curates the world's largest
and most diverse collection of lacustrine sediment cores. The biggest contributors
(by core volume) are drilling projects, but small-volume projects outnumber the drilling
campaigns by a factor of nearly 50. The vast majority of the curated materials are
moist, cylindrical cores split in half, but unsplit cores, grab samples, dry cores,
and a rapidly-growing number of rock cores, peat cores, freeze cores and permafrost
cores round out the collection. The Repository also curates unused subsamples and
sample residues for re-distribution and analysis. In addition to these physical holdings,
LacCore captures metadata for all materials moving through the Facility; thus cores
processed at LacCore but stored at other institutions are integrated among the physical
holdings for the purpose of data discovery. |