The limestones of Shakhtau are characterized by the usual qualities of limestones of organogenic structures: chemical purity, light coloration, massiveness, lack of stratification, textural heterogeneity of various scales (spotting), a wide variety of rock types, and their frequent change. In addition to pure limestones, dolomitic limestones of clearly secondary origin are found in the massif. The limestones of Shakhtau are extremely rich in the remains of various organisms of excellent preservation.