BGS Rock Classification Scheme
Weathered rock - A type of regolith. It consists of weathered material which, depending on degree of disintegration, may be described in terms of rock material weathering grades II (slightly weathered), III (moderately weathered), IV (highly weathered), V (completely weathered), or VI (residual soil). In engineering geology terms, slightly to moderately weathered material falling into weathering grades II and III are considered as weathered rock for engineering purposes, and grades IV to VI as soil. Saprolite refers to soil-like grade IV and V material which has been altered and decomposed by chemical weathering processes. British Geological Survey Research Report RR/99/04, appendix 2.
| Code | WRC |
|---|---|
| Description | Weathered rock - A type of regolith. It consists of weathered material which, depending on degree of disintegration, may be described in terms of rock material weathering grades II (slightly weathered), III (moderately weathered), IV (highly weathered), V (completely weathered), or VI (residual soil). In engineering geology terms, slightly to moderately weathered material falling into weathering grades II and III are considered as weathered rock for engineering purposes, and grades IV to VI as soil. Saprolite refers to soil-like grade IV and V material which has been altered and decomposed by chemical weathering processes. British Geological Survey Research Report RR/99/04, appendix 2. |
| Qualifiers | No qualifiers currently exist. |
| Definition | Not Available |
| Linked data | http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/WRC |
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.