- Campuses :
- Twin Cities
- Crookston
- Duluth
- Morris
- Rochester
- Other Locations
The repository accepts both new and old cores, and the standards for accessioning these cores are uniform. Many types of materials may be accessioned, including both traditional and freeze cores, surface (dredge) material, samples and their residuals, and botanical samples. Basic metadata are required for all materials to be accepted.
LacCore recommends accessioning cores immediately following retrieval, prior to splitting or sampling. Investigators wishing to conduct initial core description and/or archive the material at LacCore are asked to review the LacCore website and contact the curator for details regarding LacCore procedures, preferably before the research proposal is submitted.
LacCore seeks to archive as much material from older lacustrine cores as possible. However, each core must meet the fundamental criterion that its physical condition allows it to be useful for further study. The specific requirements for accessioning are listed below.
Minimum metadata:
- Location information (latitude/longitude, water depth)
- Date of collection
- Stratigraphic depth scale
Desirable metadata:
- Coring method
- Field notes
- Core photographs
- Lithologic descriptions
- Site survey data: seismic or ground-penetrating radar profiles; bathymetry
- Geological, biological, ecological, physiographic, and hydrologic setting
- Water chemistry data
- Sampling history (old cores)
- Analytical data (old cores)
- Associated publications and other references (old cores)
Certain qualities may justify assigning a higher priority to the acquisition of cores or sample material from some sites. These include:
For further details, contact the Kristina Brady. Initial core description procedures and core logging protocol can be found on the initial core description page.