crustal plate

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Noun1.crustal plate - a rigid layer of the Earth's crust that is believed to drift slowly
crust, Earth's crust - the outer layer of the Earth
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References in periodicals archive ?
It hit about 600 million years ago when an ancient African crustal plate collided with the North America plate creating the Lake Char fault.
An analysis of the crustal plate that Antarctica sits on would be a product of this part of his research and would also result in a significant publication for this young scientist.
But I doubt that you, I or Mr Woods could influence the movement of a crustal plate on its long interminable journey, or stop a volcano from erupting.
It's a little easier in places like Costa Rica, where the Cocos crustal plate dives down quite close to the Nicoya pen insula.
But we have explored with submersibles or remotely operated vehicles less than one percent of this fascinating zone of crustal plate creation where more than 90 percent of the earth's volcanic activity rumbles on.
Such island chains apparently formed when a "hot spot" -- a plume of hot rock rising from the planet's interior -- broke through the crustal plate overhead.
It's part of the very active "Ring of Fire," a zone of major crustal plate clashes that surround the Pacific Ocean.
But the largest quakes in the history of the contiguous United States have actually hit the supposed stable heartland, far from the edges of the crustal plate that carries North America.
These great fractures in the Earth mark an area where the northwest-moving Pacific crustal plate grinds past the North American plate.
According to plate-tectonic theory the oceanic crustal plate carrying the islands would have disappeared gradually beneath thicker continental crust, eventually rafting the islands into collision with the continent and depositing the once-submerged rocks on what is now the west coast of Norway.
Their findings, they say, will contribute to earthquake prediction models, a greater understanding of crustal plate movement, the search for hidden mineral resources and the effort to find sites appropriate for nuclear waste disposal in the earth's crust.