BGS Rock Classification Scheme

Breccia, quartzite

Code	BRCQ
Description	Breccia, quartzite
Qualifiers	quartzite
Definition	Siliciclastic arenaceous protolith >50vol% pre-existing siliceous rock clasts. Clasts >50% or dominantly sand-grade, 0.032-2mm. qtz clasts & qtz cement. Deformed (brittle), no foliation or cohesion, >30% frags coarser than matrix, rotation/granulation
Linked data	http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/BRCQ

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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.