rift zone

noun Geology.
a system of related, narrow structural depressions between parallel faults.

Origin:
1965–70

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
Its crest is a volcanic rift zone, where crustal plates spread apart and molten rock erupts to form new seafloor.
Additional updates on the new east rift zone activity will be posted each afternoon as merited.
Activity eventually stabilized at this segment of the rift zone.
Rifting began as magma welled up through the weakness in the crust, creating a volcanic rift zone.
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