CASM
Virtual Site
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The CASM site is noteworthy because it was the first active hydrothermal vent site discovered in the NE Pacific. CASM was first discovered in 1983 by a group of Canadian and U.S. Scientists using the Canadian PISCES IV submersible. However, it had not been visited by a submersible or ROV for about a decade before 1998. CASM is an acronym for Canadian American Seamount (Expedition). The CASM site is located at the northern end of Axial caldera, where the caldera wall intersects Axial's north rift zone. Hydrothermal venting at CASM is located in and around a large fissure, within about 100 m of the caldera wall. The site has both active and extinct sulfide chimneys and appears to have been rejuvenated by the 1998 eruption. Lush colonies of young tube worms and palm worms were observed after the eruption, with a distinct increase in populations after 1998. |
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Video
clips embedded within the panorama: Lush tubeworms | Palmworms and tubeworms | Palmworm colony | Octopus and fish Lamphere chimneys | T&S spires | T&S fly-by | Pandorae worms | Crab on chimney Other
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