Editing Hydrogeology of Gabon

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==Geology==
 
==Geology==
  
This section provides a summary of the geology of Gabon.  
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This section provides a summary of the geology of Gabon. More detail can be found in the references listed at the bottom of this page. Many of these references can be accessed through the [http://www.bgs.ac.uk/africagroundwateratlas/index.cfm Africa Groundwater Literature Archive].
  
 
The geology map on this page shows a simplified version of the geology at a national scale (see the [[Geology | geology resource page]] for more details).  
 
The geology map on this page shows a simplified version of the geology at a national scale (see the [[Geology | geology resource page]] for more details).  
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||Quaternary
 
||Quaternary
 
||These sediments include coastal sand belts and fluvial alluvium in river valleys, overlying bedrock. They are not shown on the geological map, but can be important local aquifers, in particular the coastal sands (see Hydrogeology section, below).
 
||These sediments include coastal sand belts and fluvial alluvium in river valleys, overlying bedrock. They are not shown on the geological map, but can be important local aquifers, in particular the coastal sands (see Hydrogeology section, below).
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|Bateké plateau
 
||Tertiary
 
||This plateau in southeast Gabon consists of continental sandstones and sands that unconformably overlie Precambrian Francevillian formations.
 
 
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|Coastal sedimentary basin
 
|Coastal sedimentary basin
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The Atlantic, or western, basin (500 x 15 to 200 km) contains up to 8000 m of younger marine formations: carbonate-rich sandstone, argillite and detrital deposits.
 
The Atlantic, or western, basin (500 x 15 to 200 km) contains up to 8000 m of younger marine formations: carbonate-rich sandstone, argillite and detrital deposits.
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|Bateké plateau
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||Tertiary
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||This plateau in southeast Gabon consists of continental sandstones and sands that unconformably overlie Precambrian Francevillian formations.
 
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!colspan="4"|Precambrian meta-sedimentary sequence
 
!colspan="4"|Precambrian meta-sedimentary sequence
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The Mayombe range contains migmatites, granitogneiss, quartzites, mica schists and complex metamorphic rocks.  
 
The Mayombe range contains migmatites, granitogneiss, quartzites, mica schists and complex metamorphic rocks.  
 
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==Hydrogeology==
 
==Hydrogeology==

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