Convergent boundaries form strong earthquakes, as well as volcanic mountains or islands, when the sinking oceanic plate melts. They are formed when two plates collide, either crumpling up and forming mountains or pushing one of the plates under the other and back into the mantle to melt. Rocks that line the boundary are pulverized as the plates grind along, creating a linear fault valley or undersea canyon. Natural or human-made structures that cross a transform boundary are offset-split into pieces and carried in opposite directions. Two plates sliding past each other forms a transform plate boundary. What is formed in transform plate boundary? But at transform plate boundaries, crust is neither created nor destroyed. At convergent boundaries, old oceanic crust is destroyed. At divergent plate boundaries, new oceanic crust is formed. Transform plate boundaries are different from the other two types of plate boundaries. What makes transform boundaries different from boundaries? The most common magmas at constructive plate margins are the iron/magnesium-rich magmas that produce basalts. One of the reasons for this is that there is little or no magma available at the plate boundary. Volcanoes do not typically occur at transform boundaries. The valleys are commonly due to erosion along individual fault lines. The broad zone of transform motion between the Pacific and North American plates formed numerous slivers of mountain ranges with narrow valleys in between. This lateral movement forms active transform boundaries.ĭoes transform boundary create mountains? As the plates in this space continue to diverge, they do so in opposite directions. What causes transform boundaries to move?Īs the plates split apart, they do so at differing speeds, creating space -anywhere from a few to several hundred miles-between spreading margins. California’s San Andreas fault is a transform boundary. Many transform boundaries are found on the sea floor, where they connect segments of diverging mid-ocean ridges. At transform boundaries lithosphere is neither created nor destroyed. Transform boundaries are places where plates slide sideways past each other. A smaller number of transform faults cut continental lithosphere. How is a transform fault boundary formed?Ī strike-slip fault is a simple offset however, a transform fault is formed between two different plates, each moving away from the spreading center of a divergent plate boundary.
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