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The Yaz culture was an early Iron Age culture of Margiana, Bactria and Sogdia. It emerges at the top of late Bronze Age sites , sometimes as stone towers and sizeable houses associated with irrigation systems. Ceramics were mostly hand-made, but there was increasing use of wheel-thrown ware. There have been found bronze or iron arrowheads, also iron sickles or carpet knives among other artifacts.
With the farming citadels, steppe-derived metallurgy and ceramics, and absence of burials it has been regarded as a likely archaeological reflection of early East Iranian culture as described in the Avesta. So far, no burials related to the culture have been found, and this is taken as possible evidence of the Zoroastrian practice of exposure or sky burial.