BGS Rock Classification Scheme - Text search results
115 records found. Please click on a code for a "thumbnail" definition.
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| Description | Code |
|---|---|
| Illite-claystone - A type of monomineralic aluminium-silicate sedimentary rock in which the aluminium-silicate mineral is illite. It is the lithified equivalent of illite-clay. British Geological Survey Research Report RR/99/03, section 9.1 and table 19. | ILLCST |
| Kaolinite-clay - A type of monomineralic aluminium-silicate sediment in which the aluminium-silicate mineral is kaolinite. It is the unlithified equivalent of kaolinite-claystone. British Geological Survey Research Report RR/99/03, section 9.1 and table 19. | KAOCLY |
| Kaolinite-claystone - A type of monomineralic aluminium-silicate sedimentary rock in which the aluminium-silicate mineral is kaolinite. It is the lithified equivalent of kaolinite-clay. British Geological Survey Research Report RR/99/03, section 9.1 and table 19. Synonym: china clay. | KAOCST |
| Tonstein - A type of monomineralic aluminium-silicate sedimentary rock. It is a band of mudstone composed dominantly of kaolinite and associated with coal seams. British Geological Survey Research Report RR/99/03, section 13.6. | KRMST |
| Lithomarge - One of the hydroxides and oxides of alumina. It consists essentially of hydrated silicates of alumina or kaolinite minerals. British Geological Survey Research Report RR/99/03, section 9.2. | LITMGE |
| Lime-gravel - A type of lime-sediment. In the Rock Classification Scheme, it is a lime-sediment in which over 25% of clasts are larger than 2 mm. The grain size classes are defined in the same way as the siliciclastic sediments. British Geological Survey Research Report RR/99/03, section 3.1, table 2 and fig. 6. See also: silicate-gravel. | LMGV |
| Lime-mud - A type of lime-sediment. In the Rock Classification Scheme, it is a lime-sediment in which over 75% of the clasts are smaller than 32 µm. The grain size classes are defined in the same way as the siliciclastic sediments. British Geological Survey Research Report RR/99/03, section 3.1, table 2 and fig. 6. See also: silicate-mud. | LMMUD |
| Lime-sand - A type of lime-sediment. In the Rock Classification Scheme, it is a lime-sediment in which clasts are predominantly 32 µm to 2 mm, with less than 75% of the clasts smaller than 32 µm and less than 25% larger than 2 mm. The grain size classes are defined in the same way as the siliciclastic sediments. British Geological Survey Research Report RR/99/03, section 3.1, table 2 and fig. 6. See also: silicate-sand. | LMSND |
| Marble and calcsilicate-rock | MACS |
| Monomineralic aluminium-silicate - These sediments and rocks take the form of clays and claystones. British Geological Survey Research Report RR/99/03, section 9.1 and table 19. | MALS |
| Marble - A type of metamorphic rock with unknown protolith based on modal composition. In the Rock Classification Scheme, it is one composed largely of calcsilicate and/or carbonate minerals, but where the relative proportions of either mineral group are unknown. British Geological Survey Research Report RR/99/02, section 6.2. | MARBLE |
| Metacarbonate-rock - A type of metasedimentary rock composed largely of calcsilicate and/or carbonate minerals. In the Rock Classification Scheme, it is one in which the modal carbonate mineral content exceeds the modal abundance of calcsilicate minerals. British Geological Survey Research Report RR/99/02, section 3.2 and fig. 7. | MCABR |
| Metacarbonate-rock and calcsilicate-rock | MCCS |
| Metasilicate-conglomerate, calcite-cemented (calcrete) | MCLCRT |
| Metalimestone, calcsilicate-rock, semipelite and pelite | MCSP |
| Metadolostone and calcsilicate-rock | MDCS |
| Metasilicate-siltstone, dolomitic | MDSSLT |
| Mudstone - An argillaceous sedimentary rock based on grain size or crystal size. British Geological Survey Research Report RR/99/03, fig. 13. See: silicate-mudstone. | MDST |
| Metalimestone with bands of calcsilicate-rock | MECA |
| Metasilicate-mudstone, ferruginous | MFSMST |