Editing Hydrogeology of Somalia

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|Hamanlei, Garba Harre, Uegit, Anole, Iscla Baidoa, Bihendula and Adigral formations, and other unnamed formations
 
|Hamanlei, Garba Harre, Uegit, Anole, Iscla Baidoa, Bihendula and Adigral formations, and other unnamed formations
 
||Jurassic
 
||Jurassic
||In the north, largely marine and clastic limestones, with less common shales and sandstones. The limestones are often karstic. In the south of the country, thought to be largely sandstones with some limestones.  
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||Largely marine and clastic limestones, with less common shales and sandstones. The limestones are often karstic.
 
||Thickness varies, mainly due to lateral facies change, from 220 m (at Gowan) to 1000 m (at Bixinduule, between Sheekh and Berbera)
 
||Thickness varies, mainly due to lateral facies change, from 220 m (at Gowan) to 1000 m (at Bixinduule, between Sheekh and Berbera)
  
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|Jurassic limestones
 
|Jurassic limestones
||The Jurassic limestones in the north of the country have the greatest potential for groundwater development in the country. There is usually pure limestone in the upper part of the formation, with marly levels and calcareous sandstones in the lower part. The upper parts in particular are usually characterised by a high degree of fracturing and probably karstic cavities, and groundwater circulation probably develops mainly in this zone. The limestones can be highly permeable, with a transmissivity value from one test borehole at Borama of 3.1 x 10<sup>-3</sup> m²/sec (270 m²/day).
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||The Jurassic limestones have the greatest potential for groundwater development in the country. There is usually pure limestone in the upper part of the formation, with marly levels and calcareous sandstones in the lower part. The upper parts in particular are usually characterised by a high degree of fracturing and probably karstic cavities, and groundwater circulation probably develops mainly in this zone. The limestones can be highly permeable, with a transmissivity value from one test borehols at Borama of 3.1 x 10<sup>-3</sup> m²/sec (270 m²/day).
  
 
The depth to water table in unconfined parts of the aquifer is usually between 5 and 15 m throughout the year.
 
The depth to water table in unconfined parts of the aquifer is usually between 5 and 15 m throughout the year.

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