BGS Rock Classification Scheme

Paragranofels - A type of metasedimentary rock based on textural attributes. It lacks any obvious foliation and layering and is commonly characterised by a granoblastic texture. A granofels can occur at any metamorphic grade with a range of lithologies. Note the para- prefix indicates a rock that is thought to have a sedimentary protolith, in contrast with orthogranofels which has an igneous protolith, and granofels where the nature of the protolith is not defined. British Geological Survey Research Report RR/99/02, section 3.3.

Code PGRNF
Description Paragranofels - A type of metasedimentary rock based on textural attributes. It lacks any obvious foliation and layering and is commonly characterised by a granoblastic texture. A granofels can occur at any metamorphic grade with a range of lithologies. Note the para- prefix indicates a rock that is thought to have a sedimentary protolith, in contrast with orthogranofels which has an igneous protolith, and granofels where the nature of the protolith is not defined. British Geological Survey Research Report RR/99/02, section 3.3.
Qualifiers No qualifiers currently exist.
Definition Granoblastic textured meta-sedimentary rock (grain size, mineralogy, protolith undefined), lacking any obvious foliation, qualifier essential; replaces granulite
Linked data http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/PGRNF

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.