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Related to graben: rift valley
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A usually elongated depression between geologic faults.

[German Graben, from Middle High German grabe, trench, from Old High German grabo, from graban, to dig; see ghrebh- in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Physical Geography) an elongated trough of land produced by subsidence of the earth's crust between two faults
[C19: from German, from Old High German graban to dig]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈgrɑ bən)

a portion of the earth's crust, bounded on at least two sides by faults, that has dropped downward in relation to adjacent portions.
[1895–1900; < German: ditch]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
* 40 new applications totalling 12,842 hectares effectively doubling Japan Gold's Sanru Project in the Omu-Kamikawa graben, northern Hokkaido;
In addition to the current publicly listed creations, DGR has a number of pipeline projects which are still in early exploration phases.DGR has also secured the majority interest (83.18%) in Armour Uganda, which owns a highly prospective oil investment in the Kanywataba Block in the Albertine Graben, Uganda.
Talon kicked off its mini-spree in October 2018 with the acquisition from Corallian Energy of a 10% stake in the 45-million barrel Curlew-A discovery in the prolific Central Graben area.
With the Hatter Graben decline about 15% complete, we expect to start drilling between the current Hollister mine area and the Hatter Graben soon.
Horsts and graben structures are dominant in the area, which were originated as a result of rifting between India and Seychelles in Late Cretaceous.
MIST Cluster Program Manager Joe Graben, who is also director of the University of Southern Mississippi's Business and Innovation Assistance Center, said the MIST Cluster represents small and large businesses with associated partners within that clusters which include federal and state agencies and academic institutions.
The Euphrates River runs via Syria, along a graben, from Turkey in the north to Iraq.
Elevated blocks of crust remain between two graben when the faults occur parallel, causing a series of crests and troughs.
When commercially viable deposits of oil were first discovered in Uganda's Albertine Graben in 2006, it was hoped that production could begin as soon as 2009.
Oil & gas company Total (Paris:FP.PA) (LSE:TTA.L) disclosed on Thursday that it has started production of gas and condensate from the West Franklin Phase 2 project, located east of Aberdeen, in the Central Graben area of the UK North Sea.
Verdi said in a statement it had called workers to strike at distribution centers in Bad Hersfeld, Leipzig, Graben, Werne and Rheinberg, Reuters reported.