Scale 03 : A deposit formed in place by chemical action, or temperature and pressure changes on surfaces in contact with water: i.e., calcium carbonate, magnesium carbonate, calcium sulfate. (SSWID, WLOP)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}