BGS Rock Classification Scheme

Metatuff, rhyolitic

Code	MTFRY
Description	Metatuff, rhyolitic
Qualifiers	rhyolite
Definition	Typically fine-grained (av. 0.032-0.25mm) meta-igneous rock with a field identifiable rhyolitic-tuff protolith; quartz 20-60% of QAPF feldspar, 35-90% alkali feldspar; CI<35%
Linked data	http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/MTFRY

• Return to search results

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.