BGS Rock Classification Scheme
Hornblende-pyroxenite - A type of pyroxenite. In the Rock Classification Scheme, it is a pyroxenite with olivine <5%, pyroxene 47 - 90%, hornblende 5 - 50% of olivine + pyroxene + hornblende. British Geological Survey Research Report RR/99/06, section 5.1 and figs. 15, 16.
| Code | HBPXT |
|---|---|
| Description | Hornblende-pyroxenite - A type of pyroxenite. In the Rock Classification Scheme, it is a pyroxenite with olivine <5%, pyroxene 47 - 90%, hornblende 5 - 50% of olivine + pyroxene + hornblende. British Geological Survey Research Report RR/99/06, section 5.1 and figs. 15, 16. |
| Qualifiers | No qualifiers currently exist. |
| Definition | Coarse-grained, av.between 2-16mm normal crystalline intrusive rock; CI M>90%; olivine <5%, pyroxene 47-90%, hornblende 5-50% of Ol+Px+Hb |
| Linked data | http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/HBPXT |
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.