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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 621 to 640 of 3025

Row	CODE	DESCRIPTION	RCS_STATUS	TRANSLATION	Q1	USER_ENTERED	DATE_ENTERED	USER_UPDATED	DATE_UPDATED	TRANSFER	DEFINITION_BKING	STATUS
621	FESD	Iron-sediment - In the Rock Classification Scheme, all iron-sediments are given this group name. This is the unlithified equivalent of ironstone. British Geological Survey Research Report RR/99/03, section 5.1 and fig. 9.	A	Iron-sediment		GRBA	24-FEB-00	TMCM	08-MAR-19		Sediment (>15wt % iron) with components >50% iron-bearing minerals (15wt%). Component size not defined	C
622	FESND	Iron-sand - A type of iron-sediment. In the Rock Classification Scheme, it is one in which clasts are predominantly 32 µm to 2 mm, with less than 75% of the clasts smaller than 32 µm and less than 25% 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 5.1, table 13 and fig. 9. See also: silicate-sand.	R	Iron-sand		GRBA	24-FEB-00	TMCM	08-MAR-19		Sediment (>15wt % iron) with grains >50% iron-bearing minerals (15wt% iron). Grains >50% or predominantly sand-grade, 0.032 to 2mm.	C
623	FEST	Ironstone - In the Rock Classification Scheme, all lithified iron-rich sedimentary rocks are given this group name. This is the lithified equivalent of iron-sediment. The textural classification of ironstones follows that for limestone. The classification of ironstones composed dominantly of one constituent similarly follows that for limestone. British Geological Survey Research Report RR/99/03, section 5.2 and fig. 9.	A	Ironstone		GRBA	24-FEB-00	TMCM	08-MAR-19		Sedimentary rock (>15wt% iron), no recognisable depositional texture with particles >50% iron-bearing minerals (15wt% iron). Particle size not defined.	C
624	FESTC	Clay-ironstone	N	Clay-ironstone		AWEL	16-MAR-04	TMCM	31-AUG-18		Sedimentary rock (>15wt% iron), no recognisable depositional texture with particles >50% iron-bearing minerals (15wt% iron). Particles >50% or predominantly clay-grade, <0.004mm.	C
625	FESTN	Ironstone nodular	U	Nodular ironstone	nodular	AWEL	17-OCT-03	TMCM	31-AUG-18		Sedimentary rock (>15wt% iron), no recognisable depositional texture with particles >50% iron-bearing minerals (15wt% iron). 5-20% of particles clumped together in, usually >2mm, nodules. Particle size not defined.	C
626	FEWST	Iron-wackestone - A type of ironstone, classified on the basis of its depositional texture. In the Rock Classification Scheme, it is a matrix-supported ironstone composed of less than 75% matrix (mud-grade material smaller than 32 µm). British Geological Survey Research Report RR/99/03, section 5.2, table 14 and fig. 9.	R	Iron-wackestone		GRBA	24-FEB-00	TMCM	08-MAR-19		Matrix-supported sedimentary rock (>15wt % iron) with particles >50% iron-bearing minerals (15wt% iron). >75% matrix (particles <0.032mm)	C
627	FGECR	Fine-grained-crystalline-rocks [exotic]	N	Fine-grained-crystalline-rocks [exotic]		AWEL	17-DEC-04	TMCM	31-AUG-18		Chemically/mineralogically exotic rock with >75% crystals av. between 0.032-0.25mm; includes only a very small proportion of igneous rocks; carbonatites, melilitic, kalsilitic, leucitic rocks, kimberlites, lamproites, lamprophyres	C
628	FGNR	Fine-grained normal crystalline rock - In the Rock Classification Scheme, a crystalline rock is fine-grained if its average crystal size is less than 0.25 mm. This classification is used for fine-grained, very fine-grained, and glassy crystalline igneous rocks. The class includes felsite, mafite, glassy-igneous-rock, and porphyry. This group corresponds to the volcanic division of the IUGS scheme. British Geological Survey Research Report RR/99/06, section 1.3 and figs. 1, 3.	A	Fine-grained normal crystalline rock		AWEL	08-JUN-01	TMCM	22-FEB-19		Chemically/mineralogically normal rock with >75% crystals av. between 0.032-0.25mm; includes most of the volume of fine-grained igneous rocks	C
629	FGOUGE	Fault-gouge - A type of mechanically broken rock without primary cohesion. In the Rock Classification Scheme, a fault-gouge may be strongly foliated, and comprises less than 30% fragments lying in fine-grained, commonly clayey matrix. British Geological Survey Research Report RR/99/02, section 7.1 and table 3.	R	Fault-gouge		GRBA	24-FEB-00	TMCM	22-FEB-19		Deformed (brittle), foliated rock; no primary cohesion, (protolith undefined) in which angular/rounded fragments (<30%) are significantly coarser than the clay size (>0.004mm) matrix	C
630	FGSST	Sandstone, ferruginous	U	Ferruginous sandstone	ferruginous	AWEL	10-JUN-02	TMCM	31-AUG-18		Siliciclastic sedimentary rock, grains >50% or predominantly sand-grade, 0.032 to 2mm. Composition not defined. 5-20% iron oxide/hydroxide minerals.	C
631	FHRMR	Fayalite-hedenbergite-rock, magnetite-rich	U	Magnetite-rich fayalite-hedenbergite-rock	magnetite-rich	AWEL	19-MAR-04	TMCM	31-AUG-18		Coarse-grained, av. between 2-16mm normal crystalline intrusive rock; CI M>90%; olivine (dominantly fayalite) 40-90%, 20% magnetite. A pyroxene-peridotite.	C
632	FILLU	Fill - A type of artifical deposit. It is a general term for material used to infill a void or cavity in the earth's surface or sub-surface. Constructional fill (made ground) is material placed above the natural earth surface. British Geological Survey Research Report RR/99/04, appendix 1.	R	Fill		AWEL	25-FEB-00	TMCM	13-MAR-19		Not Available	C
633	FINES	Fines (silts and clays) - A type of artificial deposit. In the Rock Classification Scheme, this refers to sediment grains less than 1/16 mm in size. British Geological Survey Research Report RR/99/04, table 8a.	R	Fines (silts and clays)		GRBA	24-FEB-00	TMCM	13-MAR-19		Not Available	C
634	FIS	Fine-sand [Unlithified Deposits Coding Scheme - Extended]	U	Fine-sand [UDCS-X]		TMCM	28-MAY-20			I	Not Available	C
635	FLAVA	Lava, felsic	U	Felsic lava	felsic	AWEL	21-MAY-02	TMCM	31-AUG-18		Generally light coloured material extruded in molten state & solidified; chemically normal quartz <60% or <10% feldspathoids of QAPF, remainder dominantly feldspar	C
636	FLGRAV	Gravel, flinty [Obsolete code: use VFLY]	U	Flinty gravel	flinty	AWEL	11-JUN-02	TMCM	02-OCT-20		Sediment, clasts >50% or predominantly gravel-grade, >2.0mm. 5-20% clasts of flint >50% silica of biogenic or chemical origin, porosity <10%. Hard, dense with vitreous lustre, dominantly <0.004mm, grey/black & derived from Cretaceous chalk beds.	O
637	FLMST	Limestone, ferruginous	U	Ferruginous limestone	ferruginous	AWEL	11-JUN-02	TMCM	31-AUG-18		Sedimentary rock with components >50% calcite/aragonite. 5-20% iron oxide/hydroxide minerals. Component size & iron minerals not defined.	C
638	FLNT	Flint - A nodular form of grey/black chert. The term is restricted to the nodules of chert present in Cretaceous chalk. British Geological Survey Research Report RR/99/03, section 8.2 and fig. 12.	R	Flint		GRBA	24-FEB-00	TMCM	08-MAR-19		Non-clastic siliceous sedimentary rock with >50% silica of biogenic or chemical origin, porosity <10%. Hard, dense with vitreous lustre. Dominantly <0.004mm, cryptocrystalline. Nodular grey/black & restricted to Cretaceous chalk. A chert, noviculite.	C
639	FLPTUF	Lapilli-tuff, felsitic	U	Felsitic lapilli-tuff	felsitic	KAH	21-MAR-05	TMCM	31-AUG-18		Not Available	C
640	FMDST	Mudstone, ferruginous	U	Ferruginous mudstone	ferruginous	AWEL	11-JUN-02	TMCM	31-AUG-18		Siliciclastic sedimentary rock, particles >50% or predominantly mud-grade, <0.032mm. Compostion not defined. 5 to 20% iron oxide/hydroxide minerals.	C

Displaying rows 621 to 640 of 3025