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 |
|---|---|
| Calcsilicate-rock and metavolcaniclastic igneous rocks | CSMV |
| Silicate-sandstone, coarse | CSSST |
| Claystone - A type of mudstone. British Geological Survey Research Report RR/99/03, fig. 13. See: silicate-claystone. | CST |
| Dolomite-gravel - A type of dolomite-sediment. In the Rock Classification Scheme, it is one 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 3.2, table 6 and fig. 7. See also: silicate-gravel. | DLGV |
| Dolomite-mud - A type of dolomite-sediment. In the Rock Classification Scheme, it is one 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 3.2, table 6 and fig. 7. See also: silicate-mud. | DLMUD |
| Silicate-mudstone, dolomitic | DSMDST |
| Dolomite-sand - A type of dolomite-sediment. In the Rock Classification Scheme, it is one 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 3.2, table 6 and fig. 7. See also: silicate-sand. | DSSA |
| Silicate-sandstone, dolomitic | DSSDST |
| Silicate-siltstone, dolomitic | DSSLTS |
| Iron-gravel - A type of iron-sediment. In the Rock Classification Scheme, it is one 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 5.1, table 13 and fig. 9. See also: silicate-gravel. | FEGV |
| Iron-mud - A type of iron-sediment. In the Rock Classification Scheme, it is one 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 5.1, table 13 and fig. 9. See also: silicate-mud. | FEMUD |
| Fenite - A type of metasomatic-rock. Fenites are desilicated crustal rocks formed by reaction with Na- and K-rich fluids expelled during the emplacement of carbonatite or undersaturated alkaline magmas. British Geological Survey Research Report RR/99/02, section 8. | FENITE |
| Iron-sand - A type of iron-sediment. In the Rock Classification Scheme, it is one 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 5.1, table 13 and fig. 9. See also: silicate-sand. | FESND |
| Silicate-mudstone, fissile | FSIMST |
| Silicate-mudstone, ferruginous | FSLMST |
| Granofels, calcsilicate-rock and granofelsic semipelite | GCSP |
| Granofels, calcsilicate-rock and quartzite | GCSQ |
| Granofels with calcsilicate-rock and psammite | GRCS |
| Hydroxides and oxides of alumina and iron - Their classification is based upon the state of hydration of the silicate minerals. British Geological Survey Research Report RR/99/03, section 9.2. | HYIA |
| Illite-clay - A type of monomineralic aluminium-silicate sediment in which the aluminium-silicate mineral is illite. It is the unlithified equivalent of illite-claystone. British Geological Survey Research Report RR/99/03, section 9.1 and table 19. | ILLCLY |