Farallon Plate

The Farallon Plate was an ancient oceanic plate, which began subducting under the west coast of the North American Plate— then located in modern Utah— as Pangaea broke apart during the Jurassic Period. It is named for the Farallon Islands which are located just west of San Francisco, California.

Over time the central part of the Farallon Plate was completely subducted under the southwestern part of the North American Plate. The remains of the Farallon Plate are the Juan de Fuca, Explorer and Gorda Plates, subducting under the northern part of the North American Plate; the Cocos Plate subducting under Central America; and the Nazca Plate subducting under the South American Plate.

The Farallon Plate is also responsible for transporting old island arcs and various fragments of continental crustal material rifted off from other distant plates and accreting them to the North American Plate.

These fragments from elsewhere are called terranes (sometimes, "exotic" terranes). Much of western North America is composed of these accreted terranes.

Read more about Farallon PlateCurrent State

Other articles related to "farallon plate, plate, plates":

Farallon Plate - Current State
... It is thought that much of the Farallon plate initially went under North America (particularly the western United States and southwest Canada) at a very shallow angle, creating much of the mountainous terrain ... A large fragment of the subducted Farallon plate is believed to presently be in the mantle under eastern North America ...
Basin And Range Province - Geology - Tectonics
... of compression due to the subduction of the Farallon Plate under the west coast of the North American continental plate which stimulated the thickening of the crust ... Most of the pertinent tectonic plate movement associated with the Basin and Range Province occurred in Neogene time and continues to the present ... By Early Miocene time, much of the Farallon Plate had been consumed, and the seafloor spreading ridge that separated the Farallon Plate from the Pacific Plate (East Pacific Rise) approached ...
Coast Mountains - Geology - Origins and Growth - Coast Range Arc Eruptive Period
... The final event began when the Farallon Plate continued to subduct under the new continental margin after the Insular Plate and Insular Islands collided with the old continental margin ... Magma ascending from the Farallon Plate under the new continental margin burned their way upward through the newly accreted Insular Belt, injecting huge quantities of ... that changed early during the Coast Range Arc was the status of the northern end of the Farallon Plate, a portion now known as the Kula Plate ...
Garibaldi Volcanic Belt - Geology - Background
... The Pemberton Belt began its formation when the former Farallon Plate was subducting under the British Columbia Coast 29 million years ago during the Oligocene epoch ... At this time, the north-central portion of the Farallon Plate was just starting to subduct under the U.S ... the Miocene period, the northern remnant of the Farallon Plate fractured into two tectonic plates, known as the Gorda and Juan de Fuca plates ...
Olympic-Wallowa Lineament - Broader Context - Subduction of The Farallon and Kula Plates
... the Pangaea supercontinent began to break up as a rift separated the North American Plate from what is now Europe, and pushed it west against the Farallon Plate ... The Farallon plate is notable for having been very large, and for subducting nearly horizontally under much of the United States and Mexico it is likely connected with the ... About 85 Ma ago the part of the Farallon plate from approximately California to the Gulf of Alaska separated to form the Kula Plate ...

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