BGS Rock Classification Scheme

Clay, gravelly, silty, sandy [Unlithified Deposits Coding Scheme]

Code	CVZS
Description	Clay, gravelly, silty, sandy [Unlithified Deposits Coding Scheme]
Qualifiers	gravelly   silty  sandy
Definition	Siliciclastic sediment, clay-grade, particles >75% <0.004mm. Sand-grade 0.032 to 2mm grains >silt-grade 0.004 to 0.032mm particles >gravel-grade >2mm clasts, all 5-20%. Compostion & depositional environment not defined
Linked data	http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/CVZS

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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.