BGS Rock Classification Scheme
Metavolcaniclastic-breccia - A type of metavolcaniclastic rock. In the Rock Classification Scheme, it has a primary grain size bigger than 2 mm. British Geological Survey Research Report RR/99/02, section 4 and table 2. See also: volcaniclastic-breccia, breccia.
| Code | MVCBR |
|---|---|
| Description | Metavolcaniclastic-breccia - A type of metavolcaniclastic rock. In the Rock Classification Scheme, it has a primary grain size bigger than 2 mm. British Geological Survey Research Report RR/99/02, section 4 and table 2. See also: volcaniclastic-breccia, breccia. |
| Qualifiers | No qualifiers currently exist. |
| Definition | Meta-igneous rock with a coarse-grained (av. >2mm), field identifiable volcaniclastic rock protolith in which >10% debris formed by volcanic processes, fragments dominantly angular |
| Linked data | http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/MVCBR |
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.