plate tectonics

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plate tectonics

the study of the movement of the large crustal plates that form the surface of the earth on the continental land masses and beneath the seas. see CONTINENTAL DRIFT.
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Mountains themselves can rise up from the ground due to movement in the Earth's crust and mantle with tectonic plates colliding.
Stern estimates that this layer contains about 2 percent molten rock, probably melted by the shear created as the tectonic plate grinds over the mantle.
There are eight major tectonic plates that move above Earth's mantle at rates up to 150 millimeters every year.
The team's 3D models suggest a likely answer to a question that has long plagued geologists: why do long, curving mountain chains form along some subduction zones - where two tectonic plates collide, pushing one down into the mantle?
Form a Hypothesis Based on This Question: What happens when tectonic plates collide?
During the five-week expedition, they will use the explorer robots to map individual volcanoes on the Mid-Atlantic Ridge tectonic plate boundary - which effectively runs down the centre of the Atlantic Ocean - almost two miles below the surface of the sea.
In Mexico, the Cocos tectonic plate forces its way beneath the continental edge of North America.
The boundaries of tectonic plates are also sites of earthquakes, which are caused by their movement.
The Philippines sits in the so-called Pacific Ring of Fire where tectonic plates collide causing frequent earthquakes.
However, Kattenhorn says, Europa is the first found with a patchwork of drifting tectonic plates.
The team drilled three holes in the Japan Trench area to study the rupture zone of the 2011 earthquake, a fault in the ocean floor where two of the Earth's major tectonic plates meet, deep beneath the surface of the Pacific Ocean.
Tectonic plates are giant slabs of crust, Earth's outer layer.