BGS Rock Classification Scheme - Text search results
45 records found. Please click on a code for a "thumbnail" definition.
« previous page « Page 2 of 3, records 21 to 40 of 45 » next page »
| Description | Code |
|---|---|
| Microsyenitic-rock - A type of medium-grained normal crystalline rock. In the Rock Classification Scheme, it is the medium-grained equivalent of syenitic-rock. The class includes microsyenite, micromonzonite, and similar rocks. The term may be used as a field classification when an accurate mineral mode from thin section examination is not available. British Geological Survey Research Report RR/99/06, section 5.1. | MCSYR |
| Meladiorite, melamonzonite and melasyenite | MDMS |
| Metafoid-bearing-alkali-feldspar-syenite | MFBASY |
| Metafoid-bearing-syenite | MFBSY |
| Metafoid-syenite | MFDSY |
| Metafoid-monzosyenite | MFMZSY |
| Metanepheline-syenite | MNSY |
| Metaquartz-alkali-feldspar-syenite | MQAFSY |
| Metaquartz-syenite | MQSY |
| Metasyenite, mafic | MSYGM |
| Metasyenite | MSYGNT |
| Metaleucosyenite | MSYL |
| Metamelasyenite | MSYM |
| Sodalite-monzosyenite - A foid-monzosyenite in which the dominant feldspathoid mineral is sodalite. British Geological Survey Research Report RR/99/06, section 5.1 and fig. 9. | MZSYS |
| Nepheline-monzosyenite - A foid-monzosyenite in which the dominant feldspathoid mineral is nepheline. British Geological Survey Research Report RR/99/06, section 5.1 and fig. 9. | NMZSY |
| Nepheline-syenite - A foid-syenite in which the dominant feldspathoid mineral is nepheline. British Geological Survey Research Report RR/99/06, section 5.1 and fig. 9. | NSY |
| Pseudoleucite-syenite - A foid-syenite in which the dominant feldspathoid mineral is pseudoleucite. British Geological Survey Research Report RR/99/06, section 5.1 and fig. 9. | PSSY |
| Quartz-alkali-feldspar-syenite - A type of syenitic-rock. In the Rock Classification Scheme, it is a coarse-grained crystalline igneous rock whose mineral mode plots in field 6* of the quartz - alkali feldspar - plagioclase - feldspathoid (QAPF) diagram. British Geological Survey Research Report RR/99/06, section 5.1 and figs. 9, 11, 12. | QAFSY |
| Quartz-syenite - A type of syenitic-rock. In the Rock Classification Scheme, it is a coarse-grained crystalline igneous rock whose mineral mode plots in field 7* of the quartz - alkali feldspar - plagioclase - feldspathoid (QAPF) diagram. British Geological Survey Research Report RR/99/06, section 5.1 and figs. 9, 11, 12. | QSY |
| Syenite - A type of syenitic-rock. In the Rock Classification Scheme, it is a coarse-grained crystalline igneous rock whose mineral mode plots in field 7 of the quartz - alkali feldspar - plagioclase - feldspathoid (QAPF) diagram. British Geological Survey Research Report RR/99/06, section 5.1 and figs. 9, 11, 12. | SY |