BGS Rock Classification Scheme - Text search results
220 records found. Please click on a code for a "thumbnail" definition.
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| Description | Code |
|---|---|
| Metabasalt, olivine-plagioclase-macrophyric | MBOPMA |
| Metabasalt, olivine-plagioclase-microphyric | MBOPMI |
| Metabasalt, psammite and pelite | MBPP |
| Metabasaltic-rock, macroporphyritic (unclassed) | MBRMA |
| Metabasaltic-rock, microporphyritic (unclassed) | MBRMI |
| Metabasaltic-rock, plagioclase-macrophyric | MBRPMA |
| Metabasaltic-rock, plagioclase-phyric | MBRPP |
| Meta-basaltic-trachyandesite | MBTRAN |
| Melilitic rock - A type of exotic crystalline igneous rock. In the Rock Classification Scheme, it is defined as a rock that contains more than 10% modal melilite. Although light-coloured, melilite is classified as a mafic mineral belonging to group M. Melilitic rocks are divided into ultramafic-melilitic-rock, and non-ultramafic-melilitic-rock. British Geological Survey Research Report RR/99/06, section 6.2 and figs. 27, 28. | MELR |
| Microgabbro and basalt | MGBA |
| Microgabbro and feldspar-phyric basalt | MGBF |
| Microgabbro, basalt and analcime-gabbro | MGBG |
| Tholeiitic microgabbro and tholeiitic basalt | MGTBAT |
| Metapotassic-trachybasalt | MKTRBA |
| Metalava, calcareous-basalt | MLAVCB |
| Calcareous-basaltic metatuff and calcareous-basaltic metalava | MLTC |
| Metalava, basaltic-trachyandesite | MLVBAT |
| Metalava, calcareous-basaltic | MLVCB |
| Non-carbonate salt-metarock | MNCSLR |
| Meta-non-carbonate salt | MNSLT |