Geologists refer to the places where segments meet and divide as plate boundaries. Meanwhile, geologists imagine the plates above this roiling mantle as bumper cars they repeatedly collide, stick together, then rip apart. "It's kind of like a pot boiling on a stove," Van der Elst said. Hot material near the Earth's core rises, and colder mantle rock sinks. The driving force behind plate tectonics is convection in the mantle. "Plate tectonics unified all these descriptions and said that you should be able to describe all geologic features as though driven by the relative motion of these tectonic plates." How plate tectonics works Plate size can vary greatly from a few hundred to thousands of kilometers across the Pacific and Antarctic Plates are among the largest."Before plate tectonics, people had to come up with explanations of the geologic features in their region that were unique to that particular region," said Van der Elst. What are the tonic plates?Ī tectonic plate (also called lithospheric plate) is a massive irregularly shaped slab of solid rock generally composed of both continental and oceanic lithosphere. It is bounded by the atmosphere above and the asthenosphere (another part of the upper mantle) below. The lithosphere includes the brittle upper portion of the mantle and the crust the outermost layers of Earth’s structure. The lithosphere is the solid outer part of the Earth. 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? See also what happens to old oceanic crust as new molten material rises from the mantle? 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. How do you describe transform boundaries? Plate Boundaries-Divergent-Convergent-Transform.What plate boundary shows the collision of two plates?.
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