sentences:  During the area selection phase, attention must be paid to the nature of the carbonate sequences, especially if there is a 'dolomite front' alteration identified within oil exploration wells, which is commonly associated with lead-zinc mineralisation.Thereafter, attention must be paid to picking floral facies of any reef carbonates formed from coral reef accumulations.The facies of the carbonate sequence is critical, as this is controlled mostly by faults which are the ultimate target of exploration.