BGS Rock Classification Scheme

Microleucitic-rock

Code MCLUCR
Description Microleucitic-rock
Qualifiers No qualifiers currently exist.
Definition Very fine-grained, av. between 0.032-0.004mm normal crystalline intrusive rock containing leucite, dominant/only felspathoid as phenocrysts; feldspathoids >60%, feldspar <40% of QAPF, +/- mica/pyroxene
Linked data http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/MCLUCR

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.