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Bella Lu. Vocab. U7

QuestionAnswer
asthenosphere the upper layer of the earth's mantle
Continental Drift the gradual movement of the continents across the earth's surface through geological time.
Lithosphere the rigid outer part of the earth, consisting of the crust and upper mantle.
Pangaea a supercontinent that existed during the late Paleozoic and early Mesozoic eras
Plate plates act like a hard and rigid shell
Plate Tectonics rigid lithospheric plates that move slowly over the underlying mantle.
Seafloor Spreading formation of new areas of oceanic crust
Earthquake a sudden and violent shaking of the ground
Epicenter the point on the earth's surface vertically above the focus of an earthquake
Fault an extended break in a body of rock
Focus the point of origin of an earthquake
Magnitude the great size or extent of something.
Normal Fault where two blocks of rock are pulled apart, as by tension.
Reverse Fault the hanging wall rises relative to the footwall
Seismic Wave an elastic wave in the earth produced by an earthquake or other means.
Seismograph an instrument that measures and records details of earthquakes, such as force and duration
Strike-Slip Fault a fault in which rock strata are displaced mainly in a horizontal direction, parallel to the line of the fault
Tsunami a long high sea wave caused by an earthquake
Batholith a very large igneous intrusion extending deep in the earth's crust
Caldera a large volcanic crater
Cinder Cone Volcano During the eruption, blobs ("cinders") of lava, blown into the air, break into small fragments that fall around the opening to the volcano
Dike an intrusion of igneous rock cutting across existing strata
Hot Spot an area of volcanic activity, especially where this is isolated.
Shield Volcano a broad, domed volcano with gently sloping sides, characteristic of the eruption of fluid, basaltic lava.
Sill a tabular sheet of igneous rock intruded between and parallel with the existing strata.
Volcano a mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earth's crust.
Created by: Bella.lubinskas
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