BGS Rock Classification Scheme
Gypsum-stone - A type of non-carbonate salt that is composed of particles of the sulphate mineral gypsum. It is the lithified equivalent of gypsum-sediment. The textural classification of gypsum-stones follows that for limestone. British Geological Survey Research Report RR/99/03, section 7.2 and fig. 11.
| Code | GYPST |
|---|---|
| Description | Gypsum-stone - A type of non-carbonate salt that is composed of particles of the sulphate mineral gypsum. It is the lithified equivalent of gypsum-sediment. The textural classification of gypsum-stones follows that for limestone. British Geological Survey Research Report RR/99/03, section 7.2 and fig. 11. |
| Qualifiers | No qualifiers currently exist. |
| Definition | Sedimentary rock components >50% non-carbonate salt sulphate, >50% of non-carbonate salt crystals is gypsum (CaSO4.2H2O). Mohr's 2, several crystal habits, commonly white/pink. Component size not defined. |
| Linked data | http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/GYPST |
CAVEAT
"Thumbnail" definitions attached to some of the table entries are an interim attempt to provide simple short descriptions of the "unqualified" rock types presented within the BGS Rock Classification Scheme. Every effort has been made to ensure accuracy and consistency but minor contradictions or omissions might be present. The BGS welcomes any feedback pointing out such minor imperfections and/or providing constructive comment and suggestions for improvement of the definitions. In the first instance such feedback should be directed to Dr Tim McCormick.