BGS Rock Classification Scheme - Text search results
44 records found. Please click on a code for a "thumbnail" definition.
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| Description | Code |
|---|---|
| Dolomite-mudstone - A type of dolostone, classified on the basis of its depositional texture. In the Rock Classification Scheme, it is a matrix-supported dolostone composed of greater than 75% matrix (mud-grade material smaller than 32 µm). British Geological Survey Research Report RR/99/03, section 3.2, table 7 and fig. 7. | DLMDST |
| Dolomite-microsparstone - A type of dolostone, classified on the basis of its diagenetic texture. It is similar to dolomite-sparstone but with 4 - 32 µm crystal size. Crystals are resolvable under an optical microscope. British Geological Survey Research Report RR/99/03, section 3.2, table 8 and fig. 7. | DLMSPT |
| 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 |
| Dolomite-pseudosparstone - A type of dolostone, classified on the basis of its diagenetic texture. It is a dolostone composed almost totally of a divergent radial fibrous calcite cement in which grains or in-situ biogenic material do not constitute a framework. British Geological Survey Research Report RR/99/03, section 3.2, table 8 and fig. 7. | DLPSPT |
| Dolomite-packstone - A type of dolostone, classified on the basis of its depositional texture. It is a grain-supported dolostone with intergranular spaces filled by matrix (mud-grade material smaller than 32 µm). British Geological Survey Research Report RR/99/03, section 3.2, table 7 and fig. 7. | DLPST |
| Dolomite-sediment - In the Rock Classification Scheme, all dolomite sediments are given this group name. British Geological Survey Research Report RR/99/03, section 3.2 and fig. 7. | DLSD |
| Dolomite-sparstone - A type of dolostone, classified on the basis of its diagenetic texture. It is a dolostone composed of obliterative sparry crystals, with a crystal size larger than 32 µm. British Geological Survey Research Report RR/99/03, section 3.2, table 8 and fig. 7. | DLSPT |
| Dolomite-wackestone - A type of dolostone, classified on the basis of its depositional texture. In the Rock Classification Scheme, it is a matrix-supported dolostone composed of less than 75% matrix (mud-grade material smaller than 32 µm). British Geological Survey Research Report RR/99/03, section 3.2, table 7 and fig. 7. | DLWST |
| Dolostone - In the Rock Classification Scheme, sedimentary rocks which are composed dominantly of dolomite or ankerite are given this group name. The textural classification of dolostones follows that for limestone. The classification of dolostones composed dominantly of one constituent similarly follows that for limestone. British Geological Survey Research Report RR/99/03, section 3.2 and fig. 7. | DOLO |
| 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 |
| Ferroan-carbonatite - A type of carbonatite. In the Rock Classification Scheme, this term may be used when a modal classification is possible. In a ferroan-carbonatite, the main carbonate mineral is ferroan dolomite, ankerite or siderite. These can be distinguished from other carbonates by stain tests. British Geological Survey Research Report RR/99/06, section 6.1 and fig. 25. See also: ferrocarbonatite. | FEFBT |
| Metadolomite-boundstone | MDLBST |
| Metadolomite-carbonatite | MDLCBT |
| Metadolomite-framestone | MDLFST |
| Metadolomite-grainstone | MDLGST |
| Metadolomite-microstone | MDLMCS |
| Metadolomite-microsparstone | MDLMSP |
| Metadolomite-pseudosparstone | MDLPSP |
| Metadolomite-packstone | MDLPST |
| Metadolomite-sparstone | MDLSPT |