BGS Rock Classification Scheme
Boghead-coal - A type of sapropelic-coal. It is similar to cannel-coal but browner and rich in alginite with very few miospores. It appears unstratified on macroscopic examination. Microscopic examination shows that boghead-coal consists of alginite and very finely dispersed inertinite and vitrinite. The proportion of alginite can vary widely. Boghead-coal is sometimes referred to as torbanite. This term is not recommended for usage. British Geological Survey Research Report RR/99/03, section 6.2 and fig. 10.
| Code | BGCOL |
|---|---|
| Description | Boghead-coal - A type of sapropelic-coal. It is similar to cannel-coal but browner and rich in alginite with very few miospores. It appears unstratified on macroscopic examination. Microscopic examination shows that boghead-coal consists of alginite and very finely dispersed inertinite and vitrinite. The proportion of alginite can vary widely. Boghead-coal is sometimes referred to as torbanite. This term is not recommended for usage. British Geological Survey Research Report RR/99/03, section 6.2 and fig. 10. |
| Qualifiers | No qualifiers currently exist. |
| Definition | Sapropelic coal. Brown, mud-grade rock particles, >75% <0.032mm. Alginite dominant but variable, minor miospores. Macroscopically unstratified. Microscopically alginite with very finely dispersed inertinite & vitrinite. Torbanite |
| Linked data | http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/BGCOL |
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.