Siliceous soil is a  generic term for a soil type defined by Tom Stevenson (2011, p.19) as an ‘acid rock of a crystalline nature. It may be organic (such as flint) or inorganic (quartz) and have good heat retention, but no water retention unless found in a finely ground form in silt, clay, and other sedimentary soils. Half of the Bordeaux region is covered with siliceous soils.’

Bibliography

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