North Gorda Ridge Segment

United States · Fissure vent

North Gorda Ridge Segment

Type: Fissure vent
Elevation: 3000m (submarine)
Last eruption: 1996

This lava flow was erupted in 1996 along the North Gorda Ridge, the northernmost of five segments of the Gorda Ridge located immediately south of the Blanco Transform Fault, which offsets the Gorda and Juan de Fuca spreading ridges. Submarine cameras revealed new lava flows about 100-200 m wide along a fissure that was at least 3.5 km long. The 65-km-long North Gorda Ridge segment is located about 200 km W of the southern Oregon coast and has an hourglass shape in plan view, with a shallower narrow axial valley at the center. · Photo: Image courtesy of National Oceanic and Atmospheric Administration, 1996 (http://www.pmel.noaa.gov/vents/home.html).

Type: Fissure vent
Country: United States
Region: Eastern Pacific / Northeast Pacific Rifts Volcanic Province
Elevation: 3000m (submarine)
Coordinates: 42.670, -126.780
Last eruption: 1996
Tectonic setting: Rift zone / Oceanic crust (< 15 km)
Landform: Cluster
Major rock type: Basalt / Picro-basalt

Geological summary

The northernmost of five segments of the Gorda Ridge lies immediately south of the Blanco Transform Fault that offsets the Gorda and Juan de Fuca oceanic spreading ridges.

Excerpt from the Global Volcanism Program, Smithsonian Institution · Read the full summary on GVP →