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BLPhysical Geography

Faulting, Folding and Earthquakes

QuestionAnswer
Focus Deep below surface where earthquake starts
Epicenter Point on earths surface directly above focus where earthquake is strongest
Seismograph Instrument used to measure and record the seismic waves
Richter Scale The scale used to measure the magnitude of an earthquake
Tsunami Caused by an underwater earthquake. Massive waves.
Liquifaction Liquefaction is a phenomenon in which the strength and stiffness of a soil is reduced by earthquake shaking or other rapid loading.
Compression Squeezes and shortens rock, causes faulting and folding.
Tension Stretches body of rock.
Shearing Fractures rock and pushes sections past each other.
Anticline When rocks are compressed the layers are pushed upwards forming these.
Syncline When rocks are compressed and pushed downwards
Scarp The exposed section of a normal fault
Tear Fault A fracture in rock when one rock moves sideways past another rock
Normal Fault When crust is extended until a fault occurs
Reverse Fault When the earths crust is compressed until a fault occurs
Created by: ben lynch