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ring of fire
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Voyage
Ocean Exploration
Modern Expeditions
Ring Of Fire
Ocean Exploration
Pacific Ring of Fire Expedition. A rare sight at hydrothermal systems,this shark (~ 1.5 meters long, 5 ft), surprised us at Kasuga-2.
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Pacific Ring of Fire Expedition. Conical limpets (2cm, 0.75 in) coverthe rocks surfaces at East Diamante. The white dots on the rocks andshells are limpet egg cases. An arc crab is investigating the scene.
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Pacific Ring of Fire Expedition. Large amounts of biomass feeding on whiteflocculent mats on periphery of white smokers include vent shrimpand mussels showing that microorganisms are channeling energy upthe food chain.
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Pacific Ring of Fire Expedition. A contact between the lower basaltic andupper felsic ash units in the wall of the West Rota caldera.The outcrop is approximately 2 meters tall.
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Pacific Ring of Fire Expedition. Map of Mariana Back Arc Spreading Centervolcanoes and recent volcanic activity.
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Pacific Ring of Fire Expedition. A geological cross-section of the Mariana Arcshowing the Mariana Trench and Back Arc Spreading Center.
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Pacific Ring of Fire Expedition. Three-dimensional view of the Maug Caldera (2 X vertical exagerration). Data acquired with an EM300 sonar system and griddedat 10 meter interval. Depth range from 241 to 25 meters (790-82 feet). On this expedition
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Pacific Ring of Fire Expedition. In places at NW Eifuku, mussels are so densethat they obscure the bottom. [The mussels are ~18 cm (7 in) long.The white galatheid crabs are ~6 cm (2.5 in) long.]
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Pacific Ring of Fire Expedition. The vent mussel Bathymodiolus: wateris drawn through the siphons at the open end to the left; the footextends on the right and attaches the mussel to the rock withbyssal threads. [The mussels are up to 18 cm (7in) lo
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Pacific Ring of Fire Expedition. Limpets were seen grazing near the seepingfluids. They tend to form small clusters. This animal isprobably an undescribed species related to a limpet that occurs on seamountsoff Japan. The limpet is > ~0.5 inches (~
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Pacific Ring of Fire Expedition. A non-vent species of shrimp keeps an eyeon ROPOS at Northwest Rota-1 volcano.
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Pacific Ring of Fire Expedition. Shrimp and crabs living near the summitof Northwest Rota-1 volcano graze bacterial mats on the rocksat hydrothermal vents. They also have to watch out forvolcanic eruptions at this active submarine volcano.
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Pacific Ring of Fire Expedition. NW Rota 1 EM300 bathymetry. Thevolcano rises to a height of 535 meters below sea level. Its base isover 2000 meters deep. Brimstone Pit is near the summit ofthe volcano at 555 meters depth.
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Pacific Ring of Fire Expedition. This cross-section of NW Rota 1 shows thedistribution of particles suspended in the waters around the volcano, asmeasured by an optical turbidity sensor mounted on a CTD package (tow-yo pathshown by black saw-tooth li
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Pacific Ring of Fire Expedition. This pinnacle rises to 167 meters below thesurface. The coiled up pink masses are basket sea stars (about 50 cm across).A myriad of small fish, probably wrasses, swarm around the top of Pinnacle Cone. Turbulence aro
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Pacific Ring of Fire Expedition. Photograph shows a piece of one of the chimneyspires in the next image. It has been cut in half and is 22 cm long.The interior of the chimney is lined by a copper-rich mineral, chalcopyrite.The gray and white zone ne
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Pacific Ring of Fire Expedition. Satellite derived bathymetry of the Mariana Arc region. EM300 multibeam bathymetry is overlaid on the satellite data.
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Pacific Ring of Fire Expedition. A hydrothermal vent site near the summitof the volcano. Hot water is percolating out of the rocks and sediments in this area. The light colored objects in the lower right are sulfur rocks.
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Pacific Ring of Fire Expedition. Science Team.
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Pacific Ring of Fire Expedition. Unusual spiny crab spotted on NW Rota 1 volcano. Crabs are opportunistic predators at vent sites. The bodyof this crab is ~2 in. (~5 cm) across.
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