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Cobb Segment volcano

Submarine volcano -2100? m / - 6,890 ft
Northeastern Pacific Ocean, Juan de Fuca Ridge, 46.88°N / -129.33°W
Current status: normal or dormant (1 out of 5) | Reports
Cobb Segment volcano books
Typical eruption style: sin especificar
Erupciones del volcán Cobb Segment: 1180 BC (?) No hay terremotos recientes
Fecha / HoraRevista / ProfundidadDistanciaUbicación

Background:

The Cobb Segment in the northern part of the Juan de Fuca Ridge, lies south of the Endeavour Ridge segment. Also known as the Northern Symmetrical or NSymm Segment, the 150-km-long Cobb Segment is the longest of the Juan de Fuca Ridge. It has a narrow, 1-2 km wide axial crest with a shallow graben that has a high point at a depth of about 2300 m. A prominent seamount with hydrothermal deposits at its summit lies just west of the axis high and was the source of a broad area of young, mostly sediment-free lava flows. As with other Juan de Fuca Ridge segments, a shallow magma chamber is thought to underlie the Cobb Segment, and a preliminary uranium-series date of Holocene age was obtained on a basaltic lava flow from the Cobb Segment.
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Smithsonian / GVP volcano information


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