BGS Rock Classification Scheme
Clarain - A type of bituminous-coal, classified according to lithotype. It consists of bright to semi-bright bands of finely laminated coal. Clarain generally exhibits an overall silky lustre, and commonly contains fine vitrain bands alternating with a duller attrital groundmass. British Geological Survey Research Report RR/99/03, section 6.1 and fig. 10.
| Code | CLARIN |
|---|---|
| Description | Clarain - A type of bituminous-coal, classified according to lithotype. It consists of bright to semi-bright bands of finely laminated coal. Clarain generally exhibits an overall silky lustre, and commonly contains fine vitrain bands alternating with a duller attrital groundmass. British Geological Survey Research Report RR/99/03, section 6.1 and fig. 10. |
| Qualifiers | No qualifiers currently exist. |
| Definition | Bituminous coal lithotype. Silky lustre, bright to semi-bright, finely laminate, 0.0 to 1mm layers with fine vitrain bands & duller attrital groundmass. |
| Linked data | http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/CLARIN |
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.