Papahānaumokuākea Marine National Monument: Main Hawaiian Islands and Geologists Seamounts


NOAA expedition EX1504 Leg 3 sampled seamounts in the Papahānaumokuākea Marine National Monument, specifically targeting Hawaiian and Geologist Seamounts using the submersible Deep Discoverer. OSU marine repository archives the rock samples collected during the expedition. Archived samples include basalts, fossil corals, breccias and more. Below are the samples recovered from each dive.

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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-EX1504L3-D2-319.8-156.13388Kona Precious Coral BedCoral8.1834.212.55
OSU-EX1504L3-D4-118.98-157.112699McCall SeamountBasalt1.6734.643.63
OSU-EX1504L3-D4-318.98-157.112643McCall SeamountBasalt1.5734.673.76
OSU-EX1504L3-D4-418.98-157.112634McCall SeamountBasalt1.5734.673.74
OSU-EX1504L3-D5-118.31-158.461071Swordfish SeamountBasalt3.6934.541.8
OSU-EX1504L3-D5-418.31-158.45969Swordfish SeamountConglomerate4.0134.411.63
OSU-EX1504L3-D5-618.31-158.45973Swordfish SeamountBasalt4.3334.441.53
OSU-EX1504L3-D6-119.23-157.612135Ellis SeamountBasalt1.9834.643.05
OSU-EX1504L3-D6-219.23-157.612125Ellis SeamountBasalt1.9834.643
EX1504L3-D2 (Kona Precious Coral Bed)
Sample Location Rock Type Description Images
OSU-EX1504L3-D2-3 19.8°N, 156.13°W Coral A couple pieces of fossilized coral. Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4