The-Seychelles Bank and Madagascar Shelf in the western Indian Ocean were explored geologically during a cruise of the R/V “professor Shtokman” in 1986. Using the data of relief, sediment characteristics and their sequences of strata, paleogeographic maps (18,000 a B.P.) of these areas were produced. These maps show that the Bank and the Shelf are carbonate platforms with complicated topography. The data indicate an important role of sea level oscillation in relief development of this area. The-Seychelles Bank and Madagascar Shelf in the western Indian Ocean were explored geologically during a cruise of the R / V “professor Shtokman” in 1986. Using the data of relief, sediment characteristics and their sequences of strata, paleogeographic maps (18,000 a maps of that areas were produced. These maps show that the Bank and the Shelf are carbonate platforms with complicated topography. The data indicate an important role of sea level oscillation in relief development of this area.