What plate boundary is the San Andreas Fault on?

The San Andreas Fault is a continental transform fault that extends roughly 1,200 kilometers (750 mi) through California. It forms the tectonic boundary between the Pacific Plate and the North American Plate, and its motion is right-lateral strike-slip (horizontal).

What plates were involved in the formation of the San Andreas Fault?

Two of these moving plates meet in western California; the boundary between them is the San Andreas fault. The Pacific Plate (on the west) moves northwestward relative to the North American Plate (on the east), causing earthquakes along the fault.

Which plates are sliding past each other along the San Andreas Fault?

The San Andreas Fault and Queen Charlotte Fault are transform plate boundaries developing where the Pacific Plate moves northward past the North American Plate. The San Andreas Fault is just one of several faults that accommodate the transform motion between the Pacific and North American plates.

What causes TMJ disc displacement?

The most common cause is trauma to the lower jaw. Depending on the amount of trauma, there can be anterior disc displacement with or without reduction.

What is the boundary around the Pacific Plate called?

The Ring of Fire, also referred to as the Circum-Pacific Belt, is a path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes. The majority of Earth’s volcanoes and earthquakes take place along the Ring of Fire. 5 – 8. Earth Science, Geography, Geology, Oceanography.

Is the San Andreas Fault right lateral or left lateral?

right lateral
The San Andreas Fault marks the junction between the North American and Pacific Plates. The fault is 1300 km long, extends to at least 25 km in depth, and has a north west-south east trend. It is classified as a right lateral (dextral) strike-slip fault.

What geologic event in western North America began the formation of the San Andreas Fault?

The change in plate configuration as North American Plate began to encounter the Pacific Plate resulted in the formation of the San Andreas Fault.

What is happening at the subduction zone of the Juan de Fuca and North American plates?

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 types of boundaries cause earthquakes around the Pacific Plate?

Tectonic Plate Boundaries The Pacific Plate (on the west) slides horizontally northwestward relative to the North American Plate (on the east), causing earthquakes along the San Andreas and associated faults. The San Andreas fault is a transform plate boundary, accomodating horizontal relative motions.

What is anterior disc displacement?

Temporomandibular joint (TMJ) anterior disc displacement (ADD) is one of the most common TMJ disorders. It can occur in all age groups, with a high prevalence in adolescents1,2. ADD often presents with clicking, joint pain, a limited range of mouth opening, and masticatory difficulty.

What is TMJ disc?

Temporomandibular joint (TMJ) disc displacement, or internal disc derangement, comprises an abnormal relationship between the articular disc and the mandibular condyle and fossa. Symptoms include pain at the TMJ, often radiating to the ear, restricted range of motion (ROM) in the jaw and clicking with jaw movement.

Where is the Pacific Plate located?

The Pacific Plate is an oceanic tectonic plate that lies beneath the Pacific Ocean. At 103 million km2 (40 million sq mi), it is the largest tectonic plate.

How is a disc protrusion described in terms of position?

A disc protrusion is also described in terms of its axial position, into central, subarticular, foraminal, extraforaminal or anterior locations 4. Additionally the terms contained (outer annulus fibrosus laminae are intact) and non-contained (all laminae are deficient) are also sometimes used 4.

What is a paramedian disc protrusion?

Paramedian disc protrusion This variant of protrusion is observed when the protrusion is located, both in the center of the midline and in its lateral part. The protrusion can be directed to the spinal anus, the canal of the spinal column. The paramedian protrusion may be right- or left-sided.

What direction does the Pacific Plate move?

While the North American plate in the east moves in the southwest direction, the Pacific plate in the west moves northwest. The Hawaiian Islands are positioned at the center of the Pacific Plate.

What is diffuse protrusion of intervertebral discs?

Diffusive protrusion of intervertebral discs For this type of pathology is characterized by uneven and repeated prominence of the disc of any of the spine. Diffuse protrusion indicates that the disk is damaged by 25-50% – this is quite a strong protrusion. The forecast for such damage depends on its size and direction of formation.