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normal fault

noun, Geology
Origin
1875-1880
1875-80
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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normal fault in Science
normal fault  
A geologic fault in which the hanging wall has moved downward relative to the footwall. Normal faults occur where two blocks of rock are pulled apart, as by tension. Compare reverse fault. See Note and illustration at fault.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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