BGS Rock Classification Scheme
Cumulate-rock - A type of rock of restricted mineralogy. Cumulate is a term used for igneous rocks formed by crystal settling in a magma chamber, i.e. it is a genetic term. Some of the physical processes involved in producing cumulates result in sub-monomineralic layers. British Geological Survey Research Report RR/99/06, section 8.2.
| Code | CUR |
|---|---|
| Description | Cumulate-rock - A type of rock of restricted mineralogy. Cumulate is a term used for igneous rocks formed by crystal settling in a magma chamber, i.e. it is a genetic term. Some of the physical processes involved in producing cumulates result in sub-monomineralic layers. British Geological Survey Research Report RR/99/06, section 8.2. |
| Qualifiers | No qualifiers currently exist. |
| Definition | Normal crystalline intrusive rock undefined crystal size/chemistry/mineralogy, usually plagioclase feldspar/olivine/pyroxene/amphibole, commonly with >5mm sub-monomineralic layers, possibly formed by crystal settling in a magma chamber |
| Linked data | http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/CUR |
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.