| Period/Epoch | Sratigraphic Unit | Hydraulic Unit | Lithology | Thickness |
| Quaternary | Undefined (q) | Aquifer | Alluvial deposits | Up to 200 m |
| Tertiary/Pliocene | Undefined (p) | Aquitard | Marl, conglomerate, basalt | Up to 500 m |
| Tertiary/Miocene | Undefined (m) | Aquifer | Marl | Up to 300 m |
| Tertiary/Eocene | Undefined (e) | Aquifer | Marly limestone | Up to 800 m |
| Cretaceous/Senonian | Chekka formation (C6) | Aquitard | Chalk | 100 - 500 m |
| Cretaceous/Turonian | Maameltein formation (C5) | Aquifer | Marly limestone | 200 - 300 m |
| Cretaceous/Cenomanian | Sannine formation (C4) | Major aquifer | Dolomitic limestone | Up to 800 m |
| Cretaceous/Albian | Hammana formation (C3) | Aquitard | Marly limestone | Up to 400 m |
| Cretaceous/Upper Aptian | Mdeirij formation (C2b) | Aquifer | Dolomitic limestone | Up to 50 m |
| Cretaceous/Lower Aptian | Abeih formation (C2a) | Aquitard | Clayey limestone | 80 - 170 m |
| Cretaceous/Neocomian | Chouf formation (C1) | Aquifer | Sandstone | 10 - 300 m |
| Jurassic/Portlandian | Salima formation (J7) | Aquitard | Marly limestone | Up to 180 m |
| Jurassic/Kimmeridgian | Bikfaya formation (J6) | Major aquifer | Dolomitic limestone | Up to 80 m |
| Jurassic/Oxfordian | Bhannes formation (J5) | Aquitard | Marly limestone | Up to 150 m |
| Jurassic/Callovian | Keserwan formation (J4) | Major aquifer | Dolomitic limestone | Exceeding 1000 m |