Erosion and Deposition of Italian Stream Valleys During Historic Time.
The recent geologic history of small streams in east-central Sicily and southern Etruria has been dated archeologically. In Sicily a period of deposition began post 8th century B.C. and had ended by 325 B.C. After a period of erosion, another, less extensive, alluviation took place, probably in medieval time. North of Rome in southern Etruria an alluviation that began no earlier than the late Roman empire probably continued into medieval time.
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