BGS Rock Classification Scheme

Polyhalite-stone - A type of non-carbonate salt that is composed of particles of the sulphate mineral polyhalite. British Geological Survey Research Report RR/99/03, section 7.1 and fig. 11.

Code POYHST
Description Polyhalite-stone - A type of non-carbonate salt that is composed of particles of the sulphate mineral polyhalite. British Geological Survey Research Report RR/99/03, section 7.1 and fig. 11.
Qualifiers No qualifiers currently exist.
Definition Sedimentary rock crystals >50% non-carbonate salt sulphate dominanlty polyhalite (K2MgCa2(SO4)4.2H2O). Pink/red triclinic crystals, compact lamellar masses. Crystal size not defined.
Linked data http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/POYHST

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.