| Formation age | Type of rocks | Thickness (m) | Main hydraulic characteristics | General consideration |
| Miocene | Sandstone, chalky limestone, chert nodules | 40 m, elsewhere up to 100 m | Intermediate aquifer | Aquifer, with some aquiclude layers |
| Paleocene Eocene | Chalk marls | 660 m | Medium aquifer | |
| Maastrichtian Paleocene | Marl | 695 m | Aquiclude, confining layers | Aquiclude |
| Maastrichtian-Cenomanian | Silicified limestone, phosphatic chert Marl, dolomite, marly limestone | Around 220 m | Excellent to poor aquifer | In general, poorly developed aquifer with some good yields aquifer layers |
| Lower Cretaceous | Coarse, medium and coarse-grained sandstone | 150 m | Good aquifer | Good to excellent aquifer |