BGS Rock Classification Scheme
Oncoid-phosphorite - A type of phosphorite composed dominantly of oncoids. British Geological Survey Research Report RR/99/03, section 4.2, table 12 and fig. 8.
Code | PHONC |
---|---|
Description | Oncoid-phosphorite - A type of phosphorite composed dominantly of oncoids. British Geological Survey Research Report RR/99/03, section 4.2, table 12 and fig. 8. |
Qualifiers | No qualifiers currently exist. |
Definition | Sedimentary rock with components >50% phosphates such as those of calcium, aluminium & iron. Allochem dominantly as oncoids, >2mm coated grainswith irregular partially overlapping laminae, biogenic structures may be present. |
Linked data | http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/PHONC |
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.