BGS Rock Classification Scheme
Cannel-boghead-coal - A type of sapropelic-coal. It is a transitional stage between cannel-coal and boghead-coal in which alginite dominates over miospores. British Geological Survey Research Report RR/99/03, section 6.2 and fig. 10.
| Code | CBCOAL |
|---|---|
| Description | Cannel-boghead-coal - A type of sapropelic-coal. It is a transitional stage between cannel-coal and boghead-coal in which alginite dominates over miospores. British Geological Survey Research Report RR/99/03, section 6.2 and fig. 10. |
| Qualifiers | No qualifiers currently exist. |
| Definition | A sapropelic coal. Mud-grade, >75% <0.032mm rock. Alginite > miospores, dull black, waxy lustre, homogeneous, conchoidal fracture. Microstratification & siderite common. Microscopically macerals finer, more uniform & intimately mixed than in humic coal. |
| Linked data | http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/CBCOAL |
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.