Cobb Seamount
Underwater volcano west of Grays Harbor, Washington, United States / From Wikipedia, the free encyclopedia
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Cobb Seamount is a seamount (underwater volcano) and guyot located 500 km (310 mi) west of Grays Harbor, Washington, United States.[2] Cobb Seamount is one of the seamounts in the Cobb–Eickelberg Seamount chain, a chain of underwater volcanoes created by the Cobb hotspot that terminates near the coast of Alaska. It lies just west of the Cascadia subduction zone,[1] and was discovered in August 1950 by the U.S. Fish and Wildlife Service fisheries research vessel R/V John N. Cobb (FWS 1601).[4] By 1967, over 927 km (576 mi) of soundings and dozens of samples from the seamount had been collected.
Cobb Seamount | |
---|---|
Summit depth | 34 m (112 ft)[1] |
Height | 2,743 m (8,999 ft)[2] |
Summit area | 824 km2 (318 sq mi)[2] |
Location | |
Coordinates | 46°44′N 130°47′W |
Geology | |
Type | Seamount (underwater volcano), guyot |
Volcanic arc/chain | Cobb–Eickelberg Seamount chain |
Age of rock | about 3.3 million[3] |
History | |
Discovered by | MV John N. Cobb, 1950[2] |
Cobb Seamount is geologically interesting for its terraced, pinnacle structure, and its biological community. Like many other seamounts, Cobb Seamount acts as a biological center of diversity, and supports a dense oceanic ecosystem. Relatively convenient access and an interesting biological setting have made the seamount an object of several scientific cruises and dives.