BGS Rock Classification Scheme
Pyroclastic-rock - In the Rock Classification Scheme, pyroclastic-rock contains more than 75% by volume pyroclastic fragments. It is the consolidated equivalent of pyroclastic-sediment. British Geological Survey Research Report RR/99/06, section 4.2 and fig. 4.
| Code | PYRR |
|---|---|
| Description | Pyroclastic-rock - In the Rock Classification Scheme, pyroclastic-rock contains more than 75% by volume pyroclastic fragments. It is the consolidated equivalent of pyroclastic-sediment. British Geological Survey Research Report RR/99/06, section 4.2 and fig. 4. |
| Qualifiers | No qualifiers currently exist. |
| Definition | Lithified clastic material >10% debris formed by volcanic processes >75vol% pyroclastic fragments; size, composition not defined |
| Linked data | http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/PYRR |
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.