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Overview of the Dredged Rocks Collection

The SIO dredged rocks collection consists of more than 3500 dredge hauls and related archive materials resulting from published research, donated by investigators specializing in paleoceanography, sedimentary/igneous petrology and geochemistry.
rocks on sea floor
Dredged rocks are collected by dragging an open steel box with an attached chain bag along the ocean bottom behind a ship. The rocks from the hauls are curated and stored in wooden boxes on steel shelves 16 feet high and filling most of a 6000 square foot Butler building. Rocks in a dredge haul frequently weigh hundreds of pounds and a single leg of an expedition often collects and returns in excess of 15 tons of material.

The SIO Collection includes rocks from a wide variety of physiographic provinces located throughout the Pacific, Indian and Atlantic Oceans. All major tectonic features, including hot spots, island chains, seamounts and abyssal plains are represented and rock types include drowned coral reef rocks, ice-rafted rocks, manganese nodules as well as very rare igneous, metamorphic and mantle rocks.

Rocks on sea floor.
Photo: SIO Collections
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Staff:

Dr. Richard (Dick) Norris, Curator. Email rnorris@ucsd,edu
Dr. James W. Hawkins, Associate Curator. Email jhawkins@ucsd.edu
Mr. Warren L. Smith, Collections Manager. Email wsmith@ucsd.edu



Campus Location

Deep Sea Drilling Building-West, Rooms 55. 81B, 82, 83 and 91.
Seaweed Canyon, Butler Building T-25.



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