The fault links the Cascadia subduction zone with a divergent boundary running through the Gulf of California. The cause of all this sensation is the San Andreas Fault which is the best-known transform boundary. If you are a resident of California, you may be very accustomed to frequent predictions about imminent earthquakes-some of which pass. This is unlike divergent boundaries where new oceanic crust is generated and convergent boundaries where old oceanic crust undergoes destruction. One key aspect of transform plate that distinguishes it from divergent boundaries and convergent boundaries is that crust is not created or destroyed. In fact, the huge Pacific Plate features all boundary types i.e., convergent, divergent, and transform boundaries. Transform boundaries don’t always exist alone. Transform boundaries are also termed strike-slip boundaries, transform fault boundaries, conservative plate boundaries, or transform plate margins. This is the cause of massive earthquakes. ![]() Such locks can hold tectonic forces that accumulate over time.Įventually, the intensifying force overcomes the lock, causing a slip and a huge jump, usually extending to 8 meters. This is because of the interlocking that takes place between the two sides. The movements of the plates as they slide past each other are not smooth. Transform plate boundaries typically form on seafloors where they act as connections between mid-ocean spreading ridges. The plates’ grinding action against each other can produce phenomenal effects such as shallow earthquakes, widespread deformation of the crust, and displacement of rock. Today the North American Continent is part of the larger North American Plate! (See Figure 7.29.A transform boundary (also called a transform fault), is a fractured area or Faultline on the earth’s surface where two tectonic plates slide horizontally past each other. As new crust formed along the Mid Ocean Ridge spreading center, it became attached to the plates on either side. Why? When North America first split away from Africa and Europe, there was first a continental rift valley it became a plate boundary between the three expanding lithospheric plates. Important! Continental margins may or may not be plate boundaries! For example, the East Coast is in the middle of the North American Plate. Transform fracture zones offshore of California are within the Pacific Plate ![]() A divergent boundary forming in the Red Sea areaįigure 4.25. Convergent boundary along the west coast of South Americaįigure 4.24. Transform faults also occur within plates, but are related to movements that shape the seafloor. Spreading centers occur where continents are pulling apart. Trenches with subduction zones and volcanic arcs form - examples: San Andreas Fault system is a transform plate boundary Mid Ocean Ridge in Iceland is a divergent plate boundaryįig 4-22. Himalayan Mountains are a convergent plate boundaryįigure 4.21. ![]() When plates slide past each other creating fault systems along plate margins. The Great Basin and Rio Grande Rift Zone.mid ocean ridges in world's ocean basins.When plates diverge, spreading centers form creating new oceanic crust. When continents collide mountains belts form.
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