BGS Rock Classification Scheme
Silicate-mudstone - A type of siliciclastic argillaceous rock. In the Rock Classification Scheme, all siliciclastic argillaceous rocks are given this group name. They may be further classified as silicate-siltstone or silicate-claystone based on the proportion of silt to clay. British Geological Survey Research Report RR/99/03, section 2.3 and fig. 5.
| Code | SIMST |
|---|---|
| Description | Silicate-mudstone - A type of siliciclastic argillaceous rock. In the Rock Classification Scheme, all siliciclastic argillaceous rocks are given this group name. They may be further classified as silicate-siltstone or silicate-claystone based on the proportion of silt to clay. British Geological Survey Research Report RR/99/03, section 2.3 and fig. 5. |
| Qualifiers | No qualifiers currently exist. |
| Definition | Siliciclastic argillaceous clastic sedimentary rock, particles >50% from pre-existing siliceous rocks. Particles >50% or predominantly mud-grade <0.032mm. |
| Linked data | http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/SIMST |
CAVEAT
"Thumbnail" definitions attached to some of the table entries are an interim attempt to provide simple short descriptions of the "unqualified" rock types presented within the BGS Rock Classification Scheme. Every effort has been made to ensure accuracy and consistency but minor contradictions or omissions might be present. The BGS welcomes any feedback pointing out such minor imperfections and/or providing constructive comment and suggestions for improvement of the definitions. In the first instance such feedback should be directed to Dr Tim McCormick.