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Cleft Segment vulkaan

Submarine volcano -2140 m / - 7,021 ft
Northeastern Pacific Ocean, Juan de Fuca Ridge, 44.83°N / -130.3°W
Current status: normal or dormant (1 out of 5) | Reports
Cleft Segment vulkaan boeken
Typical eruption style: niet gespecifieerd
Cleft Segment vulkaanuitbarstingen: 1986 Geen recente aardbevingen
TijdMag. / DiepteAfstandLocatie

Background:

The Cleft Segment, the southernmost of the Juan de Fuca Ridge, lies immediately north of the Blanco Fracture Zone. The 80-km-long segment is named for a nearly continuous 10-km-long, 30-50 m wide cleft at its southern end. Two episodes of sea-floor spreading have been documented along the northern part of the Cleft Segment in the 1980's. Bathymetric surveys indicated that a series of discontinuous pillow-lava mounds were extruded along a 17-km-long fissure between 1981 and 1987. The eruption possibly took place at the time of emission of a large plume of hot mineral-laden water in 1986. The location is at a depth of about 2300 m near the northern edge of the Cleft segment and the southern end of the Vance segment of the Juan de Fuca Ridge, about 500 km west of the central Oregon coast. Youthful sheet-lava flows immediately south of the pillow lavas were estimated to be only a few years older.
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Smithsonian / GVP volcano information


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