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Vocab - Tectonic Processes

Vocab - Tectonic Processes - Tectonic Processes Word...

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1 Tectonic Processes Word Definition Picture Aftershock Smaller earth tremors that occur seconds to weeks after a major earthquake event. Anticline Rock beds that have been folded or bent upwards to form a hill or mountain Asthenosphere The plastic (part solid, part liquid) layer of the upper mantle directly below the lithosphere that can flow slowly when put under constant pressure. Batholith A massive, often bottomless intrusion of magma that cools beneath the earth[s surface to form igneous intrusive rock Caldera A large circular depression in a volcano. Centrosphere The inner part of the earth, beneath the lithosphere and consisting of the mantle and core
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2 Cinder Cone A steep-sided volcanic peak, with a large summit crater, composed mainly of volcanic ash and rock spewed out of the vent during explosive eruptions Columnar Jointing Development of columns in cooling rock: the development of parallel prismatic columns in contracting intrusive or extrusive rock undergoing cooling Composite Cone The cone is made up of alternating layers of lavas and ashes. Compression Plates moving together Continental Plates A rigid, independent segment of the lithosphere composed of mainly granite that floats on the viscous plastic asthenosphere and moves over the surface of the Earth. The Earth's continental plates are an average 125 kilometers thick and were formed more than 3 billion years ago. Also see oceanic plate. Convection Convection involves the transfer of heat energy by means of vertical mass motions through a medium. Convergent Convergent boundaries --a boundary between two plates that are moving toward each other.
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3 Divergent Divergent boundaries -- a boundary between plates that are moving away from each other Dyke An intrusion of magma that cuts across the original rock beds and cools beneath the earth’s
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