BGS Rock Classification Scheme

Metasedimentary rock based on grain size or crystal size

Code MSDR
Description Metasedimentary rock based on grain size or crystal size
Qualifiers No qualifiers currently exist.
Definition A metamorphic rock (grain size undefined) derived from a clastic or chemical sedimentary rock protolith (composition undefined) laid down under subaerial or aqueous conditions
Linked data http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/MSDR

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.