Complex sentence: The area is of the Ameki formation which is Eocene in age, it consists of ferruginious unconsolidated sandstone and sand-rich heteorliths and the basal part is the shale, the sandstone is a prolific aquifer.
Split into simpler sentences: The area is of the Ameki formation from the Eocene epoch, and it consists of ferruginous, unconsolidated sandstone and sand-rich heterolithic bedding. The basal part is the shale, and the sandstone is a prolific aquifer.