Cobb-Eickelberg Seamount chain
Encyclopedia
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 northwesterly direction, leaving a trail of seamounts in its wake. The most recent volcanic activity in the chain was at Axial Seamount
on January 28, 1998. A magnitude 4.7 earthquake was recorded in the area on the 28th.
Some features in the chain:
Seamount
A seamount is a mountain rising from the ocean seafloor that does not reach to the water's surface , and thus is not an island. These are typically formed from extinct volcanoes, that rise abruptly and are usually found rising from a seafloor of depth. They are defined by oceanographers as...
chain stretching from the Aleutian Trench
Aleutian Trench
The Aleutian Trench is a subduction zone and oceanic trench which runs along the southern coastline of Alaska and the adjacent waters of northeastern Siberia off the coast of Kamchatka Peninsula. It is classified as a "marginal trench" in the east as it runs along the margin of the continent, and...
in the north to 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...
, the youngest volcano in the chain, which lies approximately 300 miles west of Cannon Beach, 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...
. The chain was created by the Cobb hotspot
Cobb hotspot
The Cobb hotspot is a volcanic hotspot located off the Oregon/Washington coast of the United States. The hotspot is at the Juan de Fuca Ridge, and has made the Cobb-Eickelberg Seamount chain...
as the Pacific Plate
Pacific Plate
The Pacific Plate is an oceanic tectonic plate that lies beneath the Pacific Ocean. At 103 million square kilometres, it is the largest tectonic plate....
drifted in a northwesterly direction, leaving a trail of seamounts in its wake. The most recent volcanic activity in the chain was at 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...
on January 28, 1998. A magnitude 4.7 earthquake was recorded in the area on the 28th.
Some features in the chain:
- Cobb hotspotCobb hotspotThe Cobb hotspot is a volcanic hotspot located off the Oregon/Washington coast of the United States. The hotspot is at the Juan de Fuca Ridge, and has made the Cobb-Eickelberg Seamount chain...
- Axial SeamountAxial SeamountAxial 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...
- Brown Bear SeamountBrown Bear SeamountBrown Bear Seamount is a seamount approximately west of the coast of Oregon. It is connected to the larger Axial Seamount by a small ridge. Brown Bear Seamount was created by the Cobb hotspot, and is located on the near west of the Juan de Fuca Ridge...
- Cobb SeamountCobb SeamountCobb Seamount is a seamount and guyot located west of Gray's Harbor, Washington, United States. Cobb Seamount is one of the seamounts in the Cobb-Eickelberg Seamount chain, a chain of underwater volcanoes created by the Cobb hotspot that terminates near the coast of Alaska. It is aligned along...
- Patton SeamountPatton SeamountPatton Seamount is a prominent seamount in the Cobb-Eickelberg Seamount chain in the Gulf of Alaska. Located east of Kodiak Island and reaching to within of the ocean surface, Patton is one of the largest seamounts in the Cobb-Eickelberg Seamount chain...