Un terrazzo dell’Età del Ferro nel bacino del Tevere presso Attigliano (Umbria)

An Iron Age terrace in the Tiber basin near Attigliano (Umbria)

Abstract

The continental terrace of the Impruneta is formed by a Holocene alluvial deposit bearing Iron Age pottery and several continental molluscs. During the Iron Age, about 2 800 yrs 3.P., a climatic deterioration took place in the whole boreal hemisphere, testified by a general advancing of glacial fronts. The terrace of the Impruneta could represent the evidence of the 2 800 yrs B.P. event in an area not affected by glaciers: molluscs point to a cool-humid climate and the alluvium is made by the elements of an older terrace of Tibet destroyed during a more rainy period.