Hydraulic Character | Thickness (m) | Lithology | Formation | Age |
Aquifer | 0 - 20 | Sands and gravel | Alluvium | Recent Quaternary |
Aquifer | 0 - 400 | Basalt | Basalt | L. Tertiary |
Aquifer | 0 - 15 | Weathered limestone | Um Qirma (B5) | L. Eocene |
Aquiclude | 160 - 430 | Marl and Chalk | Wadi el Shallala (B5) | L. Eocene |
Aquifer | 170 - 300 | Argillaceous silicified limestone | Umm Rijam (B4) | Mid-Eocene |
Aquiclude | >100 | Marly limestone | Muwaqqar (B3) | E. Eocene |