There are several types of samples stored at the LDCR. The majority of our collection are Sediment Cores which are tubes of "mud" that can be collected from different environments: lakes, rivers, wetlands, seas and oceans. There are many types of sediment cores; which one used depends on the environment to be cored and the research goals of the project: piston, gravity, trigger-weight, kasten, box, multi-, push, vibra-, drill. Regardless of the type or location, sediment cores are a record of environmental changes through time.
In addition to sediment cores, other types of samples in our collection include Grabs (surface sediments are 'grabbed' using a variety of devices) and Dredges (a large bag made of metal chain links is lowered to the surface and dragged along the ocean/lake/river floor to collect rocks and gravel).