One of the mysteries of the English language finally explained.
An elongated block of the earth's crust lying between two faults and displaced downward relative to the blocks on either side, as in a rift valley.
- ‘The fault discovered by the team begins near the Swiss Jura mountains south of Basel and extends nearly five miles northeasterly through the Rhine graben, a valley near the city's southern edge.’
- ‘The area is characterized by a series of low-relief Jurassic horsts and graben.’
- ‘A graben is a down-dropped block of the crust resulting from extension, or pulling, of the crust.’
- ‘These faults bound horsts, grabens and tilted blocks.’
- ‘Earlier workers typically regarded the Messaras basin as a simple east-west-trending graben.’
Late 19th century: from German Graben ‘a ditch’.
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