BGS Rock Classification Scheme

Volcaniclastic-sediment - In the Rock Classification Scheme, a volcaniclastic-sediment has more than 10% volcanic debris but less than 25% pyroclastic fragments. It is the unconsolidated equivalent of a volcaniclastic-sedimentary-rock. British Geological Survey Research Report RR/99/06, section 4.2 and fig. 4.

Code VCSD
Description Volcaniclastic-sediment - In the Rock Classification Scheme, a volcaniclastic-sediment has more than 10% volcanic debris but less than 25% pyroclastic fragments. It is the unconsolidated equivalent of a volcaniclastic-sedimentary-rock. British Geological Survey Research Report RR/99/06, section 4.2 and fig. 4.
Qualifiers No qualifiers currently exist.
Definition Unlithified clastic material >10vol% debris formed by volcanic processes entirely or partly formed by any particle forming mechanism, mixed with other material, transported by any mechanism & deposited in any environment, fragment size not defined
Linked data http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/VCSD

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.