CoAxial Segment

Undersea features · Fissure vent

CoAxial Segment

Type: Fissure vent
Elevation: 2400m (submarine)
Last eruption: 1993

During a 1993 ROPOS ROV (Remotely Operated Vehicle) dive on the CoAxial Segment along the Juan de Fuca Ridge a new lava flow was discovered on the sea floor. It was still hot and venting warm water (up to 50°C), and was 2.5 km long and 300 m wide. Bright yellow sediment patches indicated the presence of iron-reducing bacteria in the vent fluids. The CoAxial segment is located about 435 km W of the Oregon coast, NE of Axial volcano. · Photo: Image courtesy of National Oceanic and Atmospheric Administration (http://www.pmel.noaa.gov/vents/home.html).

Type: Fissure vent
Country: Undersea features
Region: Eastern Pacific / Northeast Pacific Rifts Volcanic Province
Elevation: 2400m (submarine)
Coordinates: 46.520, -129.580
Last eruption: 1993
Tectonic setting: Rift zone / Oceanic crust (< 15 km)
Landform: Cluster
Major rock type: Basalt / Picro-basalt

Geological summary

The CoAxial segment of the Juan de Fuca Ridge is about 435 km W of the Oregon coast, NE of Axial volcano.

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