BGS Rock Classification Scheme

Semipelite, phyllitic

Code SPPH
Description Semipelite, phyllitic
Qualifiers phyllitic      
Definition Deformed (ductile) metasedimentary rock, (grain size & protolith undefined); modal composition <10% calc-silic/carb min, 60-80% Q+F, 20-40% other minerals (mica/chlor/garnet/cordier/staurol/Al-silic minerals) foliation surface lustre from phyllosilicates
Linked data http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/SPPH

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.