The soils of Conegliano Valdobbiadene have very ancient origins, deriving from the raising of sea- and lake beds. One part of the hills was re-modelled by the glaciers of the Dolomites, which brought various sediments downhill. The resulting soils are deep and are made up of conglomerates of rock and sand,
containing a lot of clay and sometimes rich in iron oxides. In the area unaffected by the glaciers, the soils remained of marine origin, composed of marls and sandstone, less deep and more porous. This has led to the co-existence of many types of different soils.