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A map of the tectonic plates of the earth showing the different boundary types in different colors. Locations where plates collide (convergent boundaries) are shown in red. Locations where plates are spreading (divergent boundaries) are shown in yellow.
Plate tectonics map. Depending on how they are defined, there are usually seven or eight "major" plates: African, Antarctic, Eurasian, North American, South American, Pacific, and Indo-Australian. The latter is sometimes subdivided into the Indian and Australian plates.
plate tectonics, theory dealing with the dynamics of Earth’s outer shell—the lithosphere—that revolutionized Earth sciences by providing a uniform context for understanding mountain-building processes, volcanoes, and earthquakes as well as the evolution of Earth’s surface and reconstructing its past continents and oceans.
The 2006 U.S. Geological Survey map of tectonic plates show 21 of the major plates, as well as their movements and boundaries. Convergent (colliding) boundaries are shown as a black line with teeth, divergent (spreading) boundaries as solid red lines, and transform (sliding alongside) boundaries as solid black lines.
Plate tectonics is a theory about how Earth's lithosphere is divided into a series of rigid plates; and, how movements of these plates produce earthquakes, volcanoes, ocean trenches, mountain ranges, and more.
Plate tectonics has revolutionized the way we view large features on the surface of the Earth. Earth’s internal processes were previously thought to operate in a vertical fashion, with continents, oceans, and mountain ranges bobbing up and down, without much sideways movement.
Plate Tectonics Visualization - Interactive Earth. Tectonic Tessellation Playground. Instructions: Set one of the two positions (A or B) to adjust. These points are the beginning and end position for the animation. Each land mass can be adjusted by modifying their x, y, and z axis rotation (this can be tedious).
Tectonic Plate Map. The movement of Earth's tectonic plates shape the planet's surface. This three-dimensional image shows a map of Earth's tectonic plates. Image by Naeblys
In plate tectonics, Earth’s outermost layer, or lithosphere —made up of the crust and upper mantle—is broken into large rocky plates. These plates lie on top of a partially molten layer of rock called the asthenosphere.
MapMaker: Tectonic Plates. Earth’s lithosphere is made up of a series of plates that “float” on the mantle. Explore them with MapMaker, National Geographic's classroom interactive mapping tool.