BGS Rock Classification Scheme

Lime-sediment - In the Rock Classification Scheme, these are carbonate sediments in which the dominant carbonate mineral is calcium carbonate in the form of calcite, aragonite and/or vaterite (vaterite is a metastable hexagonal form of calcium carbonate. It is exceptionally rare and it is unlikely that it would ever occur as the main mineral). British Geological Survey Research Report RR/99/03, section 3 and fig. 6.

Code LMSD
Description Lime-sediment - In the Rock Classification Scheme, these are carbonate sediments in which the dominant carbonate mineral is calcium carbonate in the form of calcite, aragonite and/or vaterite (vaterite is a metastable hexagonal form of calcium carbonate. It is exceptionally rare and it is unlikely that it would ever occur as the main mineral). British Geological Survey Research Report RR/99/03, section 3 and fig. 6.
Qualifiers No qualifiers currently exist.
Definition Sediment with crystals >50% calcite/aragonite. Crystal size not defined.
Linked data http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/LMSD

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.