Papahānaumokuākea Marine National Monument 

EX1603

NOAA expedition EX1603 sampled seamounts in the deep waters of the Papahānaumokuākea Marine National Monument of the Pacific using the submersible Deep Discoverer. OSU marine repository archives the rock samples collected during the expedition. Archived samples include basalts, fossil corals, phosphorites and more. Below are the samples recovered from each dive.

For more information please visit the dedicated NOAA Page and Background Information

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Dive sample tables: click to expand

Collection Metadata
IGSNLatitudeLongitudeDepth (m)Feature NamePrincipal Rock TypeTemp (C)Salinity (PSU)Oxygen (mg/l)
OSU-EX1603-D1-123.57-164.034245.22Necker RidgeBasalt1.4734.69-
OSU-EX1603-D1-223.57-164.034222.74Necker RidgeTuff1.4734.69-
OSU-EX1603-D2-123.95-166.041234.00French Frigate ShoalsTuff3.1534.54-
OSU-EX1603-D3-125.43-173.542320.05Pioneer BankBasalt1.6734.65-
OSU-EX1603-D3-225.43-173.542311.24Pioneer BankBasalt1.6934.65-
OSU-EX1603-D4-226.15-173.361220.44North Pioneer BankBasalt3.2034.46-
OSU-EX1603-D4-426.15-173.361154.87North Pioneer BankBasalt3.1234.47-
OSU-EX1603-D5-126.64-175.401756.92Unnamed Seamount 1Sedimentary2.3034.59-
OSU-EX1603-D5-326.65-175.401634.67Unnamed Seamount 1Sedimentary2.4134.59-
OSU-EX1603-D6-126.99-176.851291.70Unnamed Seamount 2Basalt2.9334.48-
OSU-EX1603-D7-126.43-177.802017.52Castellano SeamountBasalt1.9434.62-
OSU-EX1603-D7-326.43-177.801911.89Castellano SeamountBasalt2.0434.61-
OSU-EX1603-D8-125.36-178.433981.69Unnamed Seamount 3Basalt1.4334.70-
OSU-EX1603-D8-325.36-178.433919.84Unnamed Seamount 3Basalt1.4334.69-
EX1603-D2 (French Frigate Shoals)
Sample Location Rock Type Description Images
OSU-EX1603-D2-1 23.94569°N, 166.04°W Welded Tuff Likely a lithofied ash bed but could potentially be sediment/substrate… Image 2Image 3Image 4Image 4Image 4Image 4Image 4
EX1603-D6 (Unnamed Seamount)