What will happen when the Juan de Fuca plate Subducts?

Subduction of the Juan de Fuca plate causes melting and magma generation in the mantle, which rises to the surface to create the Cascade volcanoes. As shown in Fig. 5.11, Juan de Fuca plate ends in southern Canada and the Cascadia trench is replaced by the Queen Charlotte transform fault.

What type of landforms does subduction cause?

Various formations such as mountain ranges, islands, and trenches are caused by subduction and the volcanoes and earthquakes it triggers. In addition to causing earthquakes, subduction can also trigger tsunamis. When the older plate is holding a continent however, it does not sink, which is reassuring.

Which mountain region was formed when the Pacific plate forced it way underneath the North American Plate?

The Sierra Nevada are the eroded remnants of the volcanic arc developed when the Farallon Plate subducted beneath the continent. The San Andreas Fault and Queen Charlotte Fault are transform plate boundaries developing where the Pacific Plate moves northward past the North American Plate.

When did the Pacific and North American plates collide?

Beginning about 30 million years ago, so much of the Farallon Plate was consumed by subduction that the Pacific and North American plates were in contact, forming the San Andreas transform plate boundary in western California.

Why is the Juan de Fuca Plate being subducted under the North American Plate?

Oceanic crust forms by eruptions along the Juan de Fuca Ridge. As the Juan de Fuca Plate drifts eastward, it cools, becomes more dense, and eventually dives under the less dense North American Plate at the Cascadia Trench.

What causes plate subduction?

Subduction occurs when two plates collide at a convergent boundary, and one plate is driven beneath the other, back into the Earth’s interior. When an oceanic plate collides with a continental plate, the denser oceanic plate is bent downward and slides under the edge of the continent.

What causes the other plate to Subduct beneath the other plate during convergence?

Subduction is a geological process in which the oceanic lithosphere is recycled into the Earth’s mantle at convergent boundaries. Where the oceanic lithosphere of a tectonic plate converges with the less dense lithosphere of a second plate, the heavier plate dives beneath the second plate and sinks into the mantle.

Which tectonic plate is being subducted at the Tonga Trench?

The Pacific Plate
The Tonga Trench-Arc system is an extension-dominated, non-accretionary convergent margin. The Pacific Plate is being subducted westward in the trench.

Which plate is being subducted beneath western South America?

The Nazca Plate
The Nazca Plate, which underlies most of the southeastern Pacific, is being subducted beneath most of the west coast of South America at a rapid rate of 80 to 100 millimetres per year.

What type of plate boundary occurs between the North American and Eurasian plates?

divergent motion
The Mid Atlantic Ridge, like other ocean ridge systems, has developed as a consequence of the divergent motion between the Eurasian and North American, and African and South American Plates.

Why is oceanic crust subducted under continental crust?

When an oceanic plate converges with a continental plate, the oceanic crust will always subduct under the continental crust; this is because oceanic crust is naturally denser. This melting leads to heat being transferred upwards and uplifting the crust, eventually developing into a volcano.