Tufa  is a soil type described by Tom Stevenson (2011, p.19) as ‘a limestone concretion that forms via water dripping through gaps in limestone, tufa is typical of the soil of Orvieto, Umbria, and is also found in Montalcino, Tuscany, as well as the Langhe region of Piemonte.’ Tufa is defined by Dr Ian d’Agata (2019, p.338) as ‘a limestone resulting from deposited groundwater,’ adding that unlike tuff it is not of volcanic origin.


Dr Ian d’Agata, Native Wine Grape Terroirs (University of California Press, 2019).

Tom Stevenson (2011) The Sotheby’s Wine Encyclopedia 5th Edition by Tom Stevenson (Dorling Kindersley, 2011), p.19.