Tocharian languages
It is the Afanasevo culture to which trace the earliest Bronze Age settlers of the Tarim and Turpan basins. The Afanasevo culture ("c." 3500–2500 BCE) displays cultural and genetic connections with the Indo-European-associated cultures of the Eurasian Steppe yet predates the specifically Indo-Iranian-associated Andronovo culture ("c." 2000–900 BCE) enough to isolate the Tocharian languages from Indo-Iranian linguistic innovations like satemization.