Complex sentence: Archaeologists have confirmed the presence of a widespread layer of riverine silt deposits, shortly after the Piora oscillation, interrupting the sequence of settlement, that left a few feet of yellow sediment in the cities of Shuruppak and Uruk and extended as far north as Kish.
Split into simpler sentences: Archaeologists have confirmed the presence of a widespread layer of riverine silt deposits shortly after the Piora oscillation that interrupted the sequence of settlement. It left a few feet of yellow sediment in the cities of Shuruppak and Uruk and extended as far north as Kish.