Schist is a soil type described by Tom Stevenson as ‘heat-retaining, coarse-grain, laminated, crystalline rock that is rich in potassium and magnesium but poor in nitrogen and organic substances.’ John Szabo MS (2016, p.249) defines schist as ‘type of metamorphic rock formed at very high temperatures and pressures that cause foliation, the alignment of minerals into thin layers (schist derives from the Greek meaning ‘split’). See also mica schist. | Slaty schist.

Bibliography

John Szabo, MS, Volcanic Wines, (Jacqui Small, 2016).

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