BGS Rock Classification Scheme
Orthogranofels - A type of meta-igneous rock based on textural attributes. It lacks any obvious foliation and layering and is commonly characterised by a granoblastic texture. A granofels can occur at any metamorphic grade with a range of lithologies. Note the ortho- prefix indicates a rock that is thought to have an igneous protolith, in contrast with paragranofels which has a sedimentary protolith, and granofels where the nature of the protolith is not defined. British Geological Survey Research Report RR/99/02, sections 3.3, 5.3 and fig. 1.
| Code | OGNOF |
|---|---|
| Description | Orthogranofels - A type of meta-igneous rock based on textural attributes. It lacks any obvious foliation and layering and is commonly characterised by a granoblastic texture. A granofels can occur at any metamorphic grade with a range of lithologies. Note the ortho- prefix indicates a rock that is thought to have an igneous protolith, in contrast with paragranofels which has a sedimentary protolith, and granofels where the nature of the protolith is not defined. British Geological Survey Research Report RR/99/02, sections 3.3, 5.3 and fig. 1. |
| Qualifiers | No qualifiers currently exist. |
| Definition | Granoblastic textured meta-igneous rock (grain size & mineralogy undefined), lacking any obvious foliation, qualifier essential; replaces granulite |
| Linked data | http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/OGNOF |
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.