BGS Rock Classification Scheme

Vitrain - A type of bituminous-coal, classified according to lithotype. It is a black, glassy, vitreous coal. It occurs as thin bands, commonly less than 6 or 8 mm in thickness. It is usually very closely jointed and breaks into cubic pieces generally with a conchoidal fracture. British Geological Survey Research Report RR/99/03, section 6.1 and fig. 10.

Code VITRIN
Description Vitrain - A type of bituminous-coal, classified according to lithotype. It is a black, glassy, vitreous coal. It occurs as thin bands, commonly less than 6 or 8 mm in thickness. It is usually very closely jointed and breaks into cubic pieces generally with a conchoidal fracture. British Geological Survey Research Report RR/99/03, section 6.1 and fig. 10.
Qualifiers No qualifiers currently exist.
Definition Bituminous coal lithotype. Black, glassy, vitreous, jointed with conchoidal fracture. Breaks into cubic fragments, Usually as bands/layers 6 to 8mm thick.
Linked data http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/VITRIN

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.