The Kalaktash and Halvan assemblages of Permian fusulinids from the Padeh and Sang-Variz sections (Halvan Mountains, Yazd Province, Central Iran).

New Permian sections have been studied in the Halvan Mountains of Iran, northwestward of Tabas. In addition to the Chili, Sartakht, and Hermez formations established here earlier, the new Rizi Formation is distinguished, underlying deposits of the Triassic Sorkh Shale Formation. Conodonts, fusulinids, and smaller foraminifers found in the rocks date the formations. In particular, it is demonstrated that the Chili Formation bearing the Kalaktash fusulinid assemblage is of Sakmarian age. The age of the Halvan fusulinid assemblage from clasts in the breccia-conglomerate at the Sartakht Formation base is reevaluated, and it is shown to be late Sakmarian but not Asselian in age. The Bolorian-Kubergandian age is established for the greater part of the Sartakht Formation. Correlation of the sections studied with the other Permian sections in different regions of Iran showed their lithological and paleontological specifics as compared to the latter. On the other hand, the sections in question are surprisingly similar in both respects to sections in the Central Pamirs. Fusulinids of the Kalaktash and Halvan assemblages are figured in four plates, and five new species belonging to the genera Rugosochusenella, Benshiella, Parazellia, and Nonpseudofusulina are described. [ABSTRACT FROM AUTHOR]