Editing Hydrogeology of Sudan

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||Horizontally to gently dipping beds.  
 
||Horizontally to gently dipping beds.  
 
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!colspan="4"|Mesozoic Sedimentary
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!colspan="4"| Mesozoic Sedimentary Rocks - mainly Cretaceous
 
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|Nubian Sandstone Formation
 
|Nubian Sandstone Formation
||Upper Jurassic to Lower Cenozoic (mainly Cretaceous)s
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||Upper Jurassic to Lower Cenozoic (mainly Cretaceous)
||The Nubian Sandstone is a major regional sedimentary sequence, formed from the Lower Palaeozoic to the Cretaceous. In Sudan, the Nubian Sandstone is mainly of Cretaceous age. It covers almost one third of Sudan. It mainly comprises horizontal or gently dipping, well stratified sandstones, with layers of conglomerate and siltstone (UN 1988). It is found in the Khartoum basin, Kufra basin, Atbara basin, Blue Nile basin, Gedaref basins, Sag Elnaam basin and in Darfur. In the Khartoum basin, it exceeds 3 km in thickness. In the south, it is overlain by thick unconsolidated sediments of the Um Ruwaba Formation, while in the rest of the country it outcrops in plateaus or sub-crops below variable thicknesses of unconsolidated surface cover (UN 1988).  
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||The Nubian Sandstone covers almost one third of Sudan. It mainly comprises horizontal or gently dipping, well stratified sandstones, with layers of conglomerate and siltstone (UN 1988). It is found in the Khartoum basin, Kufra basin, Atbara basin, Blue Nile basin, Gedaref basins, Sag Elnaam basin and in Darfur. In the Khartoum basin, it exceeds 3 km in thickness. In the south, it is overlain by thick unconsolidated sediments of the Um Ruwaba Formation, while in the rest of the country it outcrops in plateaus or sub-crops below variable thicknesses of unconsolidated surface cover (UN 1988).  
 
||Major faults are recognised in the Nubian Sandstone, including the Jaulia fault. Sometimes these faults displace more than 2 km of sedimentary rocks.
 
||Major faults are recognised in the Nubian Sandstone, including the Jaulia fault. Sometimes these faults displace more than 2 km of sedimentary rocks.
 
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