BGS Rock Classification Scheme

Non-ultramafic-melilitic-rock - A type of melilitic rock. In the Rock Classification Scheme, ultramafic-melilitic-rock and non-ultramafic-melilitic-rock are distinguished using colour index M: non-ultramafic-melilitic-rock has M less than 90%. British Geological Survey Research Report RR/99/06, section 6.2 and fig. 27.

Code NUMELR
Description Non-ultramafic-melilitic-rock - A type of melilitic rock. In the Rock Classification Scheme, ultramafic-melilitic-rock and non-ultramafic-melilitic-rock are distinguished using colour index M: non-ultramafic-melilitic-rock has M less than 90%. British Geological Survey Research Report RR/99/06, section 6.2 and fig. 27.
Qualifiers No qualifiers currently exist.
Definition Normal/exotic crystalline extrusive/intrusive rock; CI M >90%; melilite >10%; grain size not defined; melilite prefix to root-name
Linked data http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/NUMELR

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.