graben

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Hydrocarbon discoveries have been made in many Mesozoic grabens in central and west Africa; in contrast, the Gao graben is almost unexplored, with only 600 km of 2D seismic and one well drilled in 1976.

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Definitions (2)

Toggle American Heritage definitions American Heritage Dictionary (1)

  1. noun A usually elongated depression between geologic faults.

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Examples (24)

  • Geologically, it looks like a graben, which is a deep valley created when a chunk of a planet's crust collapses along parallel faults. —  AnalogSFF,June2007
  • The Sekenke Mine, the oldest and longest producing gold mine in Tanzania (1909-1959; average grade 15.4 g / t Au) is also hosted in sheared metabasites within the down-dropped rocks of the Wembere Depression, a graben (down-dropped block of crust) adjacent to the Iramba Plateau. —  Marketwire - Breaking News Releases
  • The reinterpretation of stratigraphy suggests deeper angle drilling should test the intersection of major graben structures where they intersect the Roberts Mountain Formation and other carbonate-rich host rocks of the area. —  Marketwire - Breaking News Releases
  • The two license areas total almost 73,000 square kilometers (18 million acres) and are located in the Mesozoic-age Gao graben, part of the west African rift system. —  Marketwire - Breaking News Releases
  • Hydrocarbon discoveries have been made in many Mesozoic grabens in central and west Africa; in contrast, the Gao graben is almost unexplored, with only 600 km of 2D seismic and one well drilled in 1976. —  Marketwire - Breaking News Releases
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Etymologies (2)

Toggle American Heritage etymologies American Heritage Dictionary (1)

  1. German Graben, from Middle High German grabe, trench, from Old High German grabo, from graban, to dig; see ghrebh-2 in Indo-European roots.

Toggle Century etymologies Century Dictionary (1)

  1. German graben, a ditch.
 

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/ˈgrɑbɛn/
by American Heritage

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