normal-fault

normal fault

noun Geology.

Origin:
1875–80

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Science Dictionary
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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