Geologic map of the Taruntius Quadrangle of the Moon

The distribution of major physiographic provinces and geologic units of the Tarantius quadrangle is determined by the five intersecting circular multi-ringed mare basins. Three basins, in probable order of decreasing age, are Tranquillitatis, Fecunditatis, Serenitatis, Nectaris, and Crisium. The uplifted ring structures of the basin form terra mountains, peninsulas, and islands, and the depressions between the uplifts are the major deposition sites of post-basin terra and mare material.