Sintashta on the upper Ural River, noted for its chariot burials and kurgans containing horse burials, is considered the type site of the Sintashta culture, forming one of the earliest parts of the "Andronovo horizon". It is conjectured that the language spoken was still in the Proto-Indo-Iranian stage.: "The settlement and cemetery of Sintashta, for example, though located far to the north on the Trans-Ural steppe, provides the type of Indo-Iranian archaeological evidence that would more than delight an archaeologist seeking their remains in Iran or India."
