Metamorphic rocks | A soil type described by Tom Stevenson (2011, p19) as ‘one of the three basic categories of rock (see rock), caused by great heat or pressure, often both.’ Another definition is a rock type ‘formed where another type of rock has been transformed through heat or pressure,’ (Source: Winchester Science Centre). John Szabo (2016, p.248) describes metamorphic rock as a ‘rock type formed from the transformation of another type of rock, caused by heat/or high pressure. The physical and/or chemical characteristics of the original rock are significantly altered (eg. slate and schist).
John Szabo (MS), Volcanic Wines, (Jacqui Small, 2016).
Tom Stevenson (2011) The Sotheby’s Wine Encyclopedia 5th Edition by Tom Stevenson (Dorling Kindersley, 2011).