We hold 4,000 dredge and grab samples, including a large collection of manganese nodules, many of which were recovered by submersibles. Our dredge collection spans the globe and we have samples from a variety of tectonic settings. Some of these samples have few or no known equivalents on land.

Below is a map of our entire dredge collection. Circled areas have sample suites of particular regional significance. (Photographs available upon request.)

map of our dredge holdings