Deepwater Exploration of the Marianas

EX1605

NOAA expedition EX1605L1 (red symbols) and EX1605L3 (blue symbols) sampled hydrothermal vent sites, mud volcanoes, deep-sea coral and seamounts in and around the Marianas Trench Marine National Monument (MTMNM) and the Commonwealth of the Northern Mariana Islands (CNMI). Samples were obtained using the submersible Deep Discoverer. OSU marine repository archives the rock samples collected during the expedition. Archived samples include basalts, fossil corals, sulfides and more. Below are the samples recovered from each dive. 

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

Go back to the NOAA collections page




Dive sample tables: click to expand

EX1605L1-D13 (Kunanaf Hulo)

Sample Location Rock Type Description Images
OSU-EX1605L1-D13-1 16.03°N, 147.11°E Serpentinite A serpentinized mafic rock… Image 2Image 3Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4
EX1605L1-D17 (Farallon De Menidilla)

Sample Location Rock Type Description Images
OSU-EX1605L1-D17-2 16.13°N, 146.08°E Coral A large piece of fossil coral… Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4
EX1605L3-D3 (Maug)

Sample Location Rock Type Description Images
OSU-EX1605L3-D3-2 20.05°N, 145.23°E Fossil Coral A chunk of fossil coral with a few broken stems… Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4
OSU-EX1605L3-D3-4 20.05°N, 145.23°E Basalt A plagioclase and olivine phyric basalt with a cryptocrystalline groundmass… Image 2Image 3Image 4
EX1605L3-D4 (Hadal Ridge)

Sample Location Rock Type Description Images
OSU-EX1605L3-D4-1 20.48°N, 146.98°E Siltstone A very fine carbonate rich siltstone… Image 2Image 3Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4
EX1605L3-D13 (Twin Peaks)
EX1605L3-D14 (Explorer Ridge)

Sample Location Rock Type Description Images
OSU-EX1605L3-D14-1 20.68°N, 145.09°E Tephra/Siltstone A multi-layered sedimentary rock with layers of tephra and fine silt… Image 2Image 3Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4
OSU-EX1605L3-D14-3 20.68°N, 145.09°E Mud A plastic jar with fine grained mud….
EX1605L3-D20 (Unnamed Subducting Guyot)