BGS Rock Classification Scheme

Medium-grained normal crystalline rock - In the Rock Classification Scheme, a crystalline rock is medium-grained if its average crystal size is in the range 0.25 - 2 mm. British Geological Survey Research Report RR/99/06, section 5.1 and fig. 3.

Code MGNCR
Description Medium-grained normal crystalline rock - In the Rock Classification Scheme, a crystalline rock is medium-grained if its average crystal size is in the range 0.25 - 2 mm. British Geological Survey Research Report RR/99/06, section 5.1 and fig. 3.
Qualifiers No qualifiers currently exist.
Definition Not Available
Linked data http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/MGNCR

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.