Papahānaumokuākea Marine National Monument 

EX1504L2

NOAA expedition EX1504 Leg 2 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

For additional samples from this region see NOAA collection EX1603 page.

Go back to the NOAA collections page.


Dive sample tables: click to expand

Collection Metadata
IGSNLatitudeLongitudeDepth (m)Feature NamePrincipal Rock TypeTemp (C)Salinity (PSU)Oxygen (mg/l)
OSU-EX1504L2-D1-123.22-163.522147East Necker SeamountBasalt1.8134.643.16
OSU-EX1504L2-D1-222.23-163.521836East Necker SeamountBasalt2.1434612.62
OSU-EX1504L2-D2-324.43-166.092407North French Frigate Shoals SeamountBasalt1.6934.653.34
OSU-EX1504L2-D2-424.43-166.092243North French Frigate Shoals SeamountBasalt1.934.642.92
OSU-EX1504L2-D3-325.63-167.242050St. Rogatien Rift Zone RidgeBasalt1.8834.632.97
OSU-EX1504L2-D4-125.16-169.883032Maro CraterPhosphorite1.6634.663.66
OSU-EX1504L2-D4-225.16-169.886273Maro CraterBasalt1.6534.663.5
OSU-EX1504L2-D5-124.58-169.914698Southeast Maro RidgeSedimentary1.4834.74.65
OSU-EX1504L2-D6-125.08-172.491965West Northampton RidgeBasalt1.9134.633
OSU-EX1504L2-D6-325.08-172.491896West Northampton RidgeBasalt1.934.633.01
OSU-EX1504L2-D7-125.51-173.522083Pioneer Bank RidgeBasalt1.9434.632.92
OSU-EX1504L2-D7-425.51-173.522001Pioneer Bank RidgeBasalt1.9934.632.92
OSU-EX1504L2-D8-226.83-175.611164Bank 9 SouthBasalt3.0934.471.22
OSU-EX1504L2-D8-326.83-175.611169Bank 9 SouthBasalt3.234.461.11
OSU-EX1504L2-D9-127.14-176.232278East Salmon BankBasalt1.7434.643.19
OSU-EX1504L2-D9-227.14-176.232251East Salmon BankBasalt1.7434.643.19
OSU-EX1504L2-D9-427.14-176.232170East Salmon BankBasalt1.8134.632.98
OSU-EX1504L2-D10-126.82-176.311955Salmon Bank RidgeBasalt2.0134.622.6
OSU-EX1504L2-D11-127.13-175.572144Bank 9 NorthBasalt1.7334.643.15
OSU-EX1504L2-D11-227.13-175.572120Bank 9 NorthBasalt1.7634.643.05
OSU-EX1504L2-D12-227.52-175.462794Southeast Pearl & Hermes AtollSedimentary1.5134.673.86
OSU-EX1504L2-D12-427.52-175.462780Southeast Pearl & Hermes AtollBasalt1.5834.673.64
OSU-EX1504L2-D13-127.85-175.162286Unnamed SeamountBasalt1.8134.643
OSU-EX1504L2-D13-327.85-175.172161Unnamed SeamountBasalt1.8934.632.87
OSU-EX1504L2-D14-126.2-173.331587North Pioneer RidgeBasalt2.3434.582.26
OSU-EX1504L2-D14-426.2-173.331528North Pioneer RidgeBasalt2.2234.592.35
OSU-EX1504L2-D15-125.81-171.11741North Maro RidgeBasalt2.234.62.52
OSU-EX1504L2-D15-325.81-171.091645North Maro RidgeBasalt2.2534.62.46
OSU-EX1504L2-D17-125.88-167.782082North Maro RidgeBasalt1.934.633.01
OSU-EX1504L2-D17-325.88-167.782041East North GardnerBasalt1.8734.633
OSU-EX1504L2-D18-123.18-162.461515West NihoaBasalt3.0134.552.08
EX1504L2-D1 (East Necker Seamount)
EX1504L2-D3 (St. Rogatien Rift Zone Ridge)
EX1504L2-D10 (Salmon Bank Ridge)
Sample Location Rock Type Description Images
OSU-EX1504L2-D10-1 26.82°N, 176.31°W Basalt A aphanitic basalt with ~0.5mm vesicles… Image 2Image 3Image 4Image 4Image 4Image 4Image 4Image 4Image 4
EX1504L2-D18 (West Nihoa)
Sample Location Rock Type Description Images
OSU-EX1504L2-D18-1 23.18°N, 162.46°W Basalt A olivine and plagioclase phyric basalt… Image 2Image 3Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4