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DIC_ROCK_NAMEV3 (3025 rows)
Dictionary table which is part of version 3 of the BGS Rock Classification Scheme. The main part of the RCS - it contains only single lithologies.

Displaying rows 321 to 340 of 3025

Row	CODE	DESCRIPTION	RCS_STATUS	TRANSLATION	Q1	Q2	USER_ENTERED	DATE_ENTERED	USER_UPDATED	DATE_UPDATED	TRANSFER	DEFINITION_BKING	STATUS
321	CHARNR	Rock, charnockitic - A type of coarse-grained normal crystalline rock. The charnockitic suite of rocks is usually characterised by the presence of orthopyroxene (or fayalite plus quartz, though in such assemblages fayalite is invariably altered) and, in many such rocks, perthite, mesoperthite or antiperthite. Primary hydrous minerals are generally absent. They are commonly associated with norites and anorthosites and are linked closely with high-grade metamorphic terrains. Despite being composed largely of feldspar and quartz, charnockitic rocks are generally melanocratic due to very dark feldspar crystals, which also have a characteristically greasy appearance. British Geological Survey Research Report RR/99/06, section 5.1. Examples (root name and qualifier): charnockitic granite, charnockitic monzonite, charnockitic tonalite.	U	Charnockitic rock	charnockitic		GRBA	24-FEB-00	TMCM	22-FEB-19		Coarse-grained, av. between 2-16mm normal crystalline intrusive rock with perthitic feldspars (usually dark coloured), magnetite & pyroxene (usually orthopyroxene, commonly hypersthene or altered fayalite & quartz)	C
322	CHDMTN	Diamicton, chalk-rich	U	Chalk-rich diamicton	chalk-rich		AWEL	10-JUN-02	TMCM	31-AUG-18		Poorly-sorted sediment with wide clast size range, >50% clasts from pre-existing siliceous rocks, <50% >2mm. >20% of clasts chalk (friable porous sedimentary rock, >50% calcite/aragonite particles largely of biogenic origin, usually white & fine-grained).	C
323	CHEMDP	Chemical deposit (natural superficial) - A type of natural superficial deposit. It consists of sediments formed primarily by precipitation from solution or colloidal suspension or by the deposition of insoluble precipitates. British Geological Survey Research Report RR/99/04, appendix 2 and tables 5, 17.	A	Chemical deposit (natural superficial)			GRBA	24-FEB-00	TMCM	13-MAR-19		Not Available	C
324	CHEMWU	Chemical waste - A type of artifical deposit. It consists of waste material and by-products derived from the chemical industry and chemical processes. British Geological Survey Research Report RR/99/04, appendix 1.	R	Chemical waste			GRBA	24-FEB-00	TMCM	13-MAR-19		Not Available	C
325	CHINAW	China clay waste - A type of artifical deposit. It consists of kaolin and waste materials derived from the extraction of kaolin from granitic rocks. British Geological Survey Research Report RR/99/04, appendix 1.	R	China clay waste			GRBA	24-FEB-00	TMCM	13-MAR-19		Not Available	C
326	CHLK	Chalk - A friable and porous limestone. British Geological Survey Research Report RR/99/03, section 3.1 and fig. 6.	R	Chalk			GRBA	24-FEB-00	TMCM	08-MAR-19		Friable & porous sedimentary rock with particles >50% calcite/aragonite largely of biogenic origin such as coccoliths. Usually white, particle size not defined but commonly fine-grained, 0.032 to 0.25mm. Limestone.	C
327	CHRMT	Chromitite - A type of rock of restricted mineralogy. In the Rock Classification Scheme, it is a coarse-grained crystalline igneous rock in which chromite exceeds 90% of the mineral mode. British Geological Survey Research Report RR/99/06, section 8.2.	R	Chromitite			GRBA	24-FEB-00	TMCM	22-FEB-19		Coarse-grained, av. between 2-16mm crystalline intrusive rock; chromite >90% +/- feldspar	C
328	CHRT	Chert - A type of siliceous rock. It usually has a porosity of less than 10%. Chert is dense, very hard, and has a vitreous lustre. It can be further classified as opaline-chert and quartzose-chert according to the type of silica. It may not be possible to accurately use this classification without X-ray analysis. In addition, the root names jasper, flint, and agate are available to describe distinctive types. British Geological Survey Research Report RR/99/03, section 8.2 and fig. 12.	R	Chert			GRBA	24-FEB-00	TMCM	08-MAR-19		Sedimentary rock with >50% silica of biogenic or chemical origin, porosity <10% hard, dense with vitreous lustre. Crystals generally <0. 004mm, cryptocrystalline.	C
329	CHS	Clay, shelly, sandy [Unlithified Deposits Coding Scheme - Extended]	U	Sandy shelly clay [UDCS-X]	shelly	sandy	TMCM	27-MAY-20			I	Not Available	C
330	CIR	Crystalline igneous rock - Rock comprised essentially of interlocking crystals and/or glass. In the Rock Classification Scheme, this class includes normal crystalline igneous rock, and exotic crystalline igneous rock. British Geological Survey Research Report RR/99/06, section 1.3 and fig. 1.	A	Crystalline igneous rock			AWEL	08-JUN-01	TMCM	15-FEB-19		Crystalline intrusive/extrusive rock, includes both chemically & mineralogically normal & exotic, crystal size not defined, includes most of the volume of igneous rocks	C
331	CL	Clay, cobbly [Unlithified Deposits Coding Scheme]	U	Cobbly clay [UDCS]	cobbly		AWEL	09-JAN-02	TMCM	30-AUG-18		Not Available	C
332	CLAM	Clay, laminated	U	Laminated clay	laminated		DJLO	02-MAY-06	TMCM	31-AUG-18	I	Not Available	C
333	CLARIN	Clarain - A type of bituminous-coal, classified according to lithotype. It consists of bright to semi-bright bands of finely laminated coal. Clarain generally exhibits an overall silky lustre, and commonly contains fine vitrain bands alternating with a duller attrital groundmass. British Geological Survey Research Report RR/99/03, section 6.1 and fig. 10.	R	Clarain			GRBA	24-FEB-00	TMCM	08-MAR-19		Bituminous coal lithotype. Silky lustre, bright to semi-bright, finely laminate, 0.0 to 1mm layers with fine vitrain bands & duller attrital groundmass.	C
334	CLAY	Clay [Obsolete code: use C]	N	Clay			GRBA	24-FEB-00	TMCM	02-OCT-20		Not Available	O
335	CLB	Clay, cobbly, bouldery [Unlithified Deposits Coding Scheme]	U	Bouldery cobbly clay [UDCS]	cobbly	bouldery	DJLO	20-FEB-09	TMCM	30-AUG-18	I	Not Available	C
336	CLBST	Calcite-boundstone - A lime-boundstone in which the carbonate is composed dominantly of calcite. British Geological Survey Research Report RR/99/03, section 3.1 and fig. 6.	R	Calcite-boundstone			GRBA	24-FEB-00	TMCM	08-MAR-19		Sedimentary rock with components >50% calcite/aragonite. Calcite >50% of calcium carbonate. Original components bound & encrusted by action of plants/animals in growth position (reef limestone). Component size not defined.	C
337	CLCRET	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.	R	Calcrete			GRBA	24-FEB-00	TMCM	13-MAR-19		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.	C
338	CLFST	Calcite-framestone - A lime-framestone in which the carbonate is composed dominantly of calcite. British Geological Survey Research Report RR/99/03, section 3.1 and fig. 6.	R	Calcite-framestone			GRBA	24-FEB-00	TMCM	08-MAR-19		Sedimentary rock with components >50% calcite/aragonite. >50% of calcium carbonate is calcite. Fine, 0.032 to 0.25mm sediment fills cavities in framework of colonies of shells or skeletons.	C
339	CLGST	Calcite-grainstone - A lime-grainstone in which the carbonate is composed dominantly of calcite. British Geological Survey Research Report RR/99/03, section 3.1 and fig. 6.	R	Calcite-grainstone			GRBA	24-FEB-00	TMCM	08-MAR-19		Grain-supported sedimentary rock with components >50% calcite/aragonite. >50% of calcium carbonate is calcite, <15% matrix, (particles <0.032mm). Grain size not defined.	C
340	CLGV	Gravel, clayey [Obsolete code: use VC]	U	Clayey gravel	clayey		GRBA	24-FEB-00	TMCM	02-OCT-20		Not Available	O

Displaying rows 321 to 340 of 3025