Vocabularies — view dictionary terms

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 861 to 880 of 3025

Row	CODE	DESCRIPTION	RCS_STATUS	TRANSLATION	Q1	Q2	Q3	USER_ENTERED	DATE_ENTERED	USER_UPDATED	DATE_UPDATED	DEFINITION_BKING	STATUS
861	LIGN	Lignite - A type of coal. It is a member of the pure humic coal series. The members of the pure humic coal series can be ranked in order as peat (the unlithified form), lignite, bituminous-coal, and anthracite (the lithified forms) based on increasing carbon content and decreasing volatile content. Lignite is a consolidated, dull, soft brown to black coal with many readily discernible plant fragments set in a finer-grained organic matrix. It tends to crack and fall apart on drying. Lignite may be further classified into brown-lignite and black-lignite. British Geological Survey Research Report RR/99/03, section 6.1, table 16 and fig. 10.	A	Lignite				GRBA	24-FEB-00	TMCM	08-MAR-19	Lithified soft brown/black coal, mixture of a wide range of plant debris many individually discernable. Fine-grained 0.032-2mm organic matrix. 60 to 75% carbon, dry, ash-free. Volatiles 46 to 63%. Partly carbonised, cracks & breaks on drying.	C
862	LITMGE	Lithomarge - One of the hydroxides and oxides of alumina. It consists essentially of hydrated silicates of alumina or kaolinite minerals. British Geological Survey Research Report RR/99/03, section 9.2.	R	Lithomarge				GRBA	24-FEB-00	TMCM	13-MAR-19	Sediment or sedimentary rock >50% hydrated silicates of alumina or kaolinite minerals, dominantly clay-grade particles <0.004mm.	C
863	LMBST	Lime-boundstone - A type of limestone, classified on the basis of its biogenic texture. It is a limestone in which the original components were bound and encrusted together by the action of plants and animals in the position of growth (e.g. reef limestones). British Geological Survey Research Report RR/99/03, section 3.1, table 3 and fig. 6.	R	Lime-boundstone				GRBA	24-FEB-00	TMCM	08-MAR-19	Sedimentary rock with components >50% calcite/aragonite. Original components bound/encrusted by action of plants/animals in growth position (reef limestones). Component size not defined.	C
864	LMFST	Lime-framestone - A type of limestone, classified on the basis of its biogenic texture. It is a type of reef rock consisting of a rigid framework of colonies, shells or skeletons. Internal cavities are filled with fine sediment. British Geological Survey Research Report RR/99/03, section 3.1, table 3 and fig. 6.	R	Lime-framestone				GRBA	24-FEB-00	TMCM	08-MAR-19	Sedimentary rock with components >50% calcite/aragonite. Fine 0.032-0.25mm sediment fills cavities in framework of colonies of shells or skeletons. Component size not defined.	C
865	LMGST	Lime-grainstone - A type of limestone, classified on the basis of its depositional texture. It is a grain-supported limestone with little matrix (mud-grade material smaller than 32 µm). British Geological Survey Research Report RR/99/03, section 3.1, table 3 and fig. 6.	R	Lime-grainstone				GRBA	24-FEB-00	TMCM	08-MAR-19	Grain-supported Sedimentary rock with components >50% calcite/aragonite. <15% matrix, (particles <0.032mm). Component size not defined.	C
866	LMGV	Lime-gravel - A type of lime-sediment. In the Rock Classification Scheme, it is a lime-sediment in which over 25% of clasts are larger than 2 mm. The grain size classes are defined in the same way as the siliciclastic sediments. British Geological Survey Research Report RR/99/03, section 3.1, table 2 and fig. 6. See also: silicate-gravel.	R	Lime-gravel				GRBA	24-FEB-00	TMCM	08-MAR-19	Grain supported sediment with components >50% calcite/aragonite. Clasts >50% or predominantly gravel-grade, >2mm.	C
867	LMMC	Limestone, micritic	U	Micritic limestone	micritic			AWEL	05-SEP-02	TMCM	31-AUG-18	Sedimentary rock with components >50% calcite/aragonite. Crystals <0.004mm sub-microscopic.	C
868	LMMCST	Lime-microstone - A type of limestone, classified on the basis of its diagenetic texture. It is similar to lime-sparstone but with crystals smaller than 4 µm. Crystals are not resolvable under an optical microscope. British Geological Survey Research Report RR/99/03, section 3.1, table 3 and fig. 6.	R	Lime-microstone				GRBA	24-FEB-00	TMCM	08-MAR-19	Sedimentary rock with crystals >50% calcite/aragonite, petrological study shows obliterative sparry calcite <0.004mm in inequant blocky mosaics. Crystals sub-microscopic.	C
869	LMMD	Limestone, mudmound	N	Mudmound limestone				AWEL	15-APR-04	TMCM	24-AUG-18	Sediment/ary rock with components >50% calcite/aragonite. Particles mud-grade, <0.032mm. Genetic term for large carbonate bioherms low in skeletal component.	C
870	LMMOC	Microoncoid-limestone - A type of limestone composed dominantly of microoncoids. British Geological Survey Research Report RR/99/03, section 3.1, table 4 and fig. 6.	R	Microoncoid-limestone				GRBA	24-FEB-00	TMCM	08-MAR-19	Sedimentary rock with components >50% calcite/aragonite. Allochem dominantly as microoncoids, <2mm coated grains with irregular partially overlapping laminae, biogenic structures may be present.	C
871	LMMSPT	Lime-microsparstone - A type of limestone, classified on the basis of its diagenetic texture. It is similar to lime-sparstone but with 4 - 32 µm crystal size. Crystals are resolvable under an optical microscope. British Geological Survey Research Report RR/99/03, section 3.1, table 3 and fig. 6.	R	Lime-microsparstone				GRBA	24-FEB-00	TMCM	08-MAR-19	Sedimentary rock with crystals >50% calcite/aragonite, petrological study shows obliterative sparry calcite, 0.004 to 0.032mm (microscopic) in inequant blocky mosaics.	C
872	LMMST	Lime-mudstone - A type of limestone, classified on the basis of its depositional texture. In the Rock Classification Scheme, it is a matrix-supported limestone composed of greater than 75% matrix (mud-grade material smaller than 32 µm). British Geological Survey Research Report RR/99/03, section 3.1, table 3 and fig. 6.	R	Lime-mudstone				GRBA	24-FEB-00	TMCM	08-MAR-19	Sedimentary rock with components >50% calcite/aragonite. Particles >50% or predominantly mud-grade, <0.032mm.	C
873	LMMUD	Lime-mud - A type of lime-sediment. In the Rock Classification Scheme, it is a lime-sediment in which over 75% of the clasts are smaller than 32 µm. The grain size classes are defined in the same way as the siliciclastic sediments. British Geological Survey Research Report RR/99/03, section 3.1, table 2 and fig. 6. See also: silicate-mud.	R	Lime-mud				GRBA	24-FEB-00	TMCM	08-MAR-19	Sediment with components >50% calcite/aragonite. Particles >50% or predominantly mud-grade, <0.032mm.	C
874	LMONC	Oncoid-limestone - A type of limestone composed dominantly of oncoids. British Geological Survey Research Report RR/99/03, section 3.1, table 4 and fig. 6. Synonym: lime-oncolite.	R	Oncoid-limestone				GRBA	24-FEB-00	TMCM	08-MAR-19	Sediment with components >50% calcite/aragonite. Allochem dominantly as oncoids, >2mm coated grains with irregular partially overlapping laminae, biogenic structures may be present. Component size not defined.	C
875	LMOOL	Ooid-limestone - A type of limestone composed dominantly of ooids. British Geological Survey Research Report RR/99/03, section 3.1, table 4 and fig. 6. Synonyms: ooidal limestone; limestone, ooidal.	R	Ooid-limestone				GRBA	24-FEB-00	TMCM	08-MAR-19	Sedimentary rock with components >50% calcite/aragonite. Ooids dominant allochem, <2mm coated grains with smooth regular laminae, usually spherical/ellipsoidal no obvious biogenic structures.	C
876	LMPBF	Lamprophyre, foliated-biotite	U	Foliated-biotite lamprophyre	foliated	biotite		AWEL	21-MAY-02	TMCM	31-AUG-18	Meta-lamprophyre exotic crystalline intrusive melano-mesocratic panidiomorphic rock; mafic phenocrysts +/-orthoclase/plagio/felspathoids/glass in matrix. 5-20% biotite, <5mm planar texture/structure from preferred orientation of platy/prismatic minerals.	C
877	LMPBI	Lamprophyre, biotite	U	Biotite lamprophyre	biotite			AWEL	26-FEB-01	TMCM	31-AUG-18	Exotic crystalline intrusive melano-mesocratic panidiomorphic rock; mafic phenocrysts of +/-Fe-phlogopite/amphibole/pyroxene/diopsidic & Ti-rich augite/olivine/melilite, +/-orthoclase/plagioclase/felspathoid/glass mainly in matrix. 5-20% biotite.	C
878	LMPDL	Lamproite, diopside-leucite - A type of lamproite. British Geological Survey Research Report RR/99/06, section 6.5. Synonym: cedricite.	U	Diopside-leucite lamproite	diopside	leucite		AWEL	17-DEC-04	TMCM	22-FEB-19	Exotic crystalline intrusive rock; diop	C
879	LMPDLP	Lamproite, diopside-leucite-phlogopite - A type of lamproite. British Geological Survey Research Report RR/99/06, section 6.5. Synonym: wyomingite.	U	Diopside-leucite-phlogopite lamproite	diopside	leucite	phlogopite	AWEL	17-DEC-04	TMCM	22-FEB-19	Exotic crystalline rock; diop	C
880	LMPDM	Lamproite, diopside-madupitic - A type of lamproite. The term madupitic indicates that the rock contains poikilitic groundmass phlogopite, as opposed to a phlogopite lamproite in which the phlogopite occurs as phenocrysts. British Geological Survey Research Report RR/99/06, section 6.5. Synonym: madupite.	U	Diopside-madupitic lamproite	diopside	madupitic		AWEL	17-DEC-04	TMCM	22-FEB-19	Exotic crystalline rock; 5-20% diop, poikilitic g'ndmss Ti-phlog/Ti-tetraferriphlog, 5-90vol%, phenocrystic Fe-leuc/richter/forsteritic olivine/sanid, no primary plag/mel/monticell/kals/neph/Na-feld/sodal/nosean/hauyne/melan/schorlom/kimzeyite. Madupite	C

Displaying rows 861 to 880 of 3025