BGS Rock Classification Scheme

Quartzose-chert - A type of chert in which the silica consists predominantly of quartz. British Geological Survey Research Report RR/99/03, section 8.2 and fig. 12.

Code QCHERT
Description Quartzose-chert - A type of chert in which the silica consists predominantly of quartz. British Geological Survey Research Report RR/99/03, section 8.2 and fig. 12.
Qualifiers No qualifiers currently exist.
Definition Non-clastic siliceous sedimentary rock with >50% silica of biogenic or chemical origin, porosity <10% hard, dense with vitreous lustre. Silica, quartz 88 to 98%. Dominantly <0.004mm
Linked data http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/QCHERT

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.