BGS Rock Classification Scheme
Calcrete - A type of duricrust. It is a conglomerate consisting of surficial sand and gravel cemented into a hard mass by calcium carbonate. British Geological Survey Research Report RR/99/03, section 13.6; RR/99/04, appendix 2. Synonym: caliche.
| Code | CLCRET |
|---|---|
| Description | Calcrete - A type of duricrust. It is a conglomerate consisting of surficial sand and gravel cemented into a hard mass by calcium carbonate. British Geological Survey Research Report RR/99/03, section 13.6; RR/99/04, appendix 2. Synonym: caliche. |
| Qualifiers | No qualifiers currently exist. |
| Definition | Pedogenic sedimentary conglomerate rock, with clasts from pre-existing rocks cemented by calcium carbonate. Clasts >50% >2mm, & significant 0.032-2mm grains. Formed on/in upper soil layers in semi-arid areas. See duricrust/caliche/ferricrete/silcrete. |
| Linked data | http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/CLCRET |
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.