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24 Cards in this Set
- Front
- Back
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earthquake
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sudden movement or vibration
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compressive stress
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pushed together
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tension stress
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stretched, pulled apart
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shear stress
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different parts of an object moved in different directions
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torsion stress
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twisted
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normal faults
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tension stress
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reverse faults
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compressive stress
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strike slip faults
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shear and torsion stress
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elastic deformation
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snaps back to its original position
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plastic deformation
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stays the way it was stretched
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do rocks form elasticly or plasticly
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plastic
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fault
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crack in earth's crust where rocks moved
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modified mercalli scale
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measures damage
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richter scale
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measures energy release
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viscosity
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the measure of the resistance of a fluid to flow
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high viscosity
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does not want to move
granitic volcanoes erupt violently |
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low viscosity
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moves easy
basaltic |
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types of volcanoes
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cinder cone
shield composite |
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constructive & ex.
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building up of land form
ex. volcanoes |
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destructive & ex.
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tearing earth landforms down
ex. weathering, glaciers, earthquakes |
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hot spots
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do not move but plates move above them
ex. Hawaiian Islands volcano leaves hot spot it becomes inactive |
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cinder cone
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form when primary eruptive products are large fragments of solid material; height is usually in the hundreds of meters range (this is small)
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shield volcano
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broad, flat structures made up of layer upon layer of lava; form from basaltic lava and high temperatures
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composite volcano
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composed of alternating layers; very big volcanoes; formed from alternating highly explosive events that form pyroclastic materials
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