Cobb hotspot
Encyclopedia
Volcano
2. Bedrock3. Conduit 4. Base5. Sill6. Dike7. Layers of ash emitted by the volcano8. Flank| 9. Layers of lava emitted by the volcano10. Throat11. Parasitic cone12. Lava flow13. Vent14. Crater15...
hotspot
Hotspot (geology)
The places known as hotspots or hot spots in geology are volcanic regions thought to be fed by underlying mantle that is anomalously hot compared with the mantle elsewhere. They may be on, near to, or far from tectonic plate boundaries. There are two hypotheses to explain them...
located off the Oregon
Oregon
Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...
/Washington coast of the United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...
. The hotspot is at the Juan de Fuca Ridge
Juan de Fuca Ridge
The Juan de Fuca Ridge is a tectonic spreading center located off the coasts of the state of Washington in the United States and the province of British Columbia in Canada. It runs northward from a transform boundary, the Blanco Fracture Zone, to a triple junction with the Nootka Fault and the...
, and has made the Cobb-Eickelberg Seamount chain
Cobb-Eickelberg Seamount chain
The Cobb-Eickelberg Seamount chain is a seamount chain stretching from the Aleutian Trench in the north to Axial Seamount, the youngest volcano in the chain, which lies approximately 300 miles west of Cannon Beach, Oregon. The chain was created by the Cobb hotspot as the Pacific Plate drifted in a...
. The Axial Seamount
Axial Seamount
Axial Seamount is a seamount and submarine volcano located on the Juan de Fuca Ridge approximately west of Cannon Beach, Oregon. The seamount, high, stands above the average height of the Juan de Fuca Ridge...
is the hotspot's most recent eruptive center, which last erupted in 1998.
The central ridge is thicker than the surrounding crust by one to two km and may be accumulated buildup from the hotspot, which is essentially an underwater volcano with a root twenty to forty kilometers in diameter reaching a depth of 11 kilometres (6.8 mi) beneath the volcano. The magma flows at rate of 0.3 to 0.8 m³/s. The caldera is 1450 metres (4,757.2 ft) below sea level.
Volcano
2. Bedrock3. Conduit 4. Base5. Sill6. Dike7. Layers of ash emitted by the volcano8. Flank| 9. Layers of lava emitted by the volcano10. Throat11. Parasitic cone12. Lava flow13. Vent14. Crater15...
hotspot
Hotspot (geology)
The places known as hotspots or hot spots in geology are volcanic regions thought to be fed by underlying mantle that is anomalously hot compared with the mantle elsewhere. They may be on, near to, or far from tectonic plate boundaries. There are two hypotheses to explain them...
located off the Oregon
Oregon
Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...
/Washington coast of the United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...
. The hotspot is at the Juan de Fuca Ridge
Juan de Fuca Ridge
The Juan de Fuca Ridge is a tectonic spreading center located off the coasts of the state of Washington in the United States and the province of British Columbia in Canada. It runs northward from a transform boundary, the Blanco Fracture Zone, to a triple junction with the Nootka Fault and the...
, and has made the Cobb-Eickelberg Seamount chain
Cobb-Eickelberg Seamount chain
The Cobb-Eickelberg Seamount chain is a seamount chain stretching from the Aleutian Trench in the north to Axial Seamount, the youngest volcano in the chain, which lies approximately 300 miles west of Cannon Beach, Oregon. The chain was created by the Cobb hotspot as the Pacific Plate drifted in a...
. The Axial Seamount
Axial Seamount
Axial Seamount is a seamount and submarine volcano located on the Juan de Fuca Ridge approximately west of Cannon Beach, Oregon. The seamount, high, stands above the average height of the Juan de Fuca Ridge...
is the hotspot's most recent eruptive center, which last erupted in 1998.
The central ridge is thicker than the surrounding crust by one to two km and may be accumulated buildup from the hotspot, which is essentially an underwater volcano with a root twenty to forty kilometers in diameter reaching a depth of 11 kilometres (6.8 mi) beneath the volcano. The magma flows at rate of 0.3 to 0.8 m³/s. The caldera is 1450 metres (4,757.2 ft) below sea level.
Volcano
2. Bedrock3. Conduit 4. Base5. Sill6. Dike7. Layers of ash emitted by the volcano8. Flank| 9. Layers of lava emitted by the volcano10. Throat11. Parasitic cone12. Lava flow13. Vent14. Crater15...
hotspot
Hotspot (geology)
The places known as hotspots or hot spots in geology are volcanic regions thought to be fed by underlying mantle that is anomalously hot compared with the mantle elsewhere. They may be on, near to, or far from tectonic plate boundaries. There are two hypotheses to explain them...
located off the Oregon
Oregon
Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...
/Washington coast of the United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...
. The hotspot is at the Juan de Fuca Ridge
Juan de Fuca Ridge
The Juan de Fuca Ridge is a tectonic spreading center located off the coasts of the state of Washington in the United States and the province of British Columbia in Canada. It runs northward from a transform boundary, the Blanco Fracture Zone, to a triple junction with the Nootka Fault and the...
, and has made the Cobb-Eickelberg Seamount chain
Cobb-Eickelberg Seamount chain
The Cobb-Eickelberg Seamount chain is a seamount chain stretching from the Aleutian Trench in the north to Axial Seamount, the youngest volcano in the chain, which lies approximately 300 miles west of Cannon Beach, Oregon. The chain was created by the Cobb hotspot as the Pacific Plate drifted in a...
. The Axial Seamount
Axial Seamount
Axial Seamount is a seamount and submarine volcano located on the Juan de Fuca Ridge approximately west of Cannon Beach, Oregon. The seamount, high, stands above the average height of the Juan de Fuca Ridge...
is the hotspot's most recent eruptive center, which last erupted in 1998.
The central ridge is thicker than the surrounding crust by one to two km and may be accumulated buildup from the hotspot, which is essentially an underwater volcano with a root twenty to forty kilometers in diameter reaching a depth of 11 kilometres (6.8 mi) beneath the volcano. The magma flows at rate of 0.3 to 0.8 m³/s. The caldera is 1450 metres (4,757.2 ft) below sea level. http://kiska.giseis.alaska.edu/input/west/presentations/agu2001_presentation.pdf