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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 486 to 505 of 3025

Row	CODE	DESCRIPTION	RCS_STATUS	TRANSLATION	Q1	Q2	USER_ENTERED	DATE_ENTERED	USER_UPDATED	DATE_UPDATED	TRANSFER	DEFINITION_BKING	STATUS
486	DART	Dacitic-rock (TAS)	N	Dacitic-rock (TAS)			AWEL	17-DEC-04	TMCM	31-AUG-18		Fine-grained, av. <0.25mm normal crystalline extrusive/intrusive rock; quartz 20-60% of QAPF, feldspar >65% plagioclase, TAS SiO2 63-77wt%, Na2O+K2O <8wt%	C
487	DAT	Dacite (TAS) - A type of dacitic-rock, classified using the total alkali silica (TAS) classification. The TAS classification may be used if the mineral mode of a normal fine-grained crystalline rock cannot be determined due either to the presence of glass or to the fine-grained nature of the rock. The definition of dacite (TAS) is as shown in British Geological Survey Research Report RR/99/06, section 5.2 and figs. 17b, 20.	R	Dacite (TAS)			GRBA	24-FEB-00	TMCM	22-FEB-19		Fine-grained, av.<0.25mm normal crystalline extrusive/intrusive rock; quartz 20-60% of QAPF, feldspar >65% plagioclase, TAS SiO2 63-77wt%, Na2O+K2O <8wt%	C
488	DATP	Dacite, porphyritic (TAS)	U	Porphyritic dacite (TAS)	porphyritic		AWEL	20-NOV-03	TMCM	31-AUG-18		Fine-grained, av.<0.25mm normal crystalline extrusive/intrusive rock; quartz 20-60% of QAPF, feldspar >65% plagioclase, TAS SiO2 63-77wt%, Na2O+K2O <8wt%. Contains undefined phenocrysts, larger crystals in finer matrix.	C
489	DATUF	Tuff, dacitic	U	Dacitic tuff	dacitic		AWEL	22-MAY-02	TMCM	31-AUG-18		Lithified clastic material >10% debris formed by volcanic processes; >75vol% pyroclastic fragments, >75% ash <2mm; chemically normal; quartz 20-60% QAPF, feldspar >65% plagioclase	C
490	DAVST	Volcaniclastic-sandstone, dacitic	U	Dacitic volcaniclastic-sandstone	dacitic		AWEL	22-MAY-02	TMCM	31-AUG-18		Lithified clastic material >10% debris formed by volcanic processes; <25vol% pyroclastic fragments, sand grade (0.032-2mm); chemically normal; quartz 20-60% QAPF, feldspar >65% plagioclase	C
491	DCLAVA	Lava, dacitic	U	Dacitic lava	dacitic		DJLO	30-NOV-06	TMCM	31-AUG-18	I	Not Available	C
492	DCOAL	Dull-coal - A type of bituminous-coal, classified according to brightness. British Geological Survey Research Report RR/99/03, section 6.1 and fig. 10.	R	Dull-coal			GRBA	24-FEB-00	TMCM	08-MAR-19		Bituminous coal brightness type. Prefix defines type	C
493	DHBBR	Diorite, hornblende-bearing-biotite-rich	U	Hornblende-bearing-biotite-rich diorite	hornblende-bearing	biotite-rich	AWEL	17-DEC-04	TMCM	31-AUG-18		Coarse-grained, av. between 2-16mm normal crystalline intrusive rock; quartz <5% of QAPF, feldspar >90% plagioclase (<50% An), hornblende <5%, biotite >20%, +/- pyroxene/olivine	C
494	DI	Diorite - A type of dioritic-rock. In the Rock Classification Scheme, it is a coarse-grained crystalline igneous rock whose mineral mode plots in field 10 of the quartz - alkali feldspar - plagioclase - feldspathoid (QAPF) diagram. Diorite, gabbro and anorthosite are separated according to the average composition of their plagioclase and the proportion of mafic minerals (M): if M is greater than 10% and An (the anorthite content of plagioclase) is less than 50% the rock is diorite. British Geological Survey Research Report RR/99/06, section 5.1 and figs. 9, 11, 12.	R	Diorite			GRBA	24-FEB-00	TMCM	22-FEB-19		Coarse-grained, av. between 2-16mm normal crystalline intrusive rock; quartz <5% of QAPF, feldspar >90% plagioclase (<50% An), +/- mica/pyroxene/amphibole/olivine	C
495	DIAMIT	Diamictite - A type of siliciclastic sediment and sedimentary rock. Sedimentary rocks that are poorly sorted and contain a wide range of clast sizes can be given this root name. The strict descriptive definition relates to range of particle size and not to relative abundance of any or all size classes. These rock types therefore traverse the boundary of siliciclastic rudaceous, arenaceous and argillaceous sedimentary rocks. This is the consolidated equivalent of diamicton. British Geological Survey Research Report RR/99/03, section 2 and figs. 2, 3 and 5.	R	Diamictite			GRBA	24-FEB-00	TMCM	08-MAR-19		Poorly-sorted sedimentary rock with wide clast size range, clasts >50vol% from pre-existing siliceous rocks. May be rudaceous, arenaceous or argillaceous grade. Composition not defined.	C
496	DIAOOZ	Diatomaceous-ooze - A type of siliceous-ooze which is predominantly composed of diatoms. It is the unlithified equivalent of diatomite. British Geological Survey Research Report RR/99/03, section 8.1 and fig. 12.	R	Diatomaceous-ooze			GRBA	24-FEB-00	TMCM	08-MAR-19		Non-clastic siliceous sediment with >50% silica of biogenic or chemical origin, little strength & readily deformed. Silica dominantly amorphous opal, (opal-A). Particles predominantly diatoms (0.01mm)	C
497	DIATOM	Diatomite - A type of siliceous rock which is predominantly composed of diatoms. It is the lithified equivalent of diatomaceous-ooze. British Geological Survey Research Report RR/99/03, section 8.2 and fig. 12.	R	Diatomite			GRBA	24-FEB-00	TMCM	08-MAR-19		Non-clastic siliceous sedimentary rock with >50% silica of biogenic or chemical origin, porosity 50 to 90%. Silica dominantly opal-CT. Particles predominantly diatoms, (0.01mm). Infusiorial earth, kieselguhr, tripolite.	C
498	DIATSD	Diatom-rich sediment - A type of biological sediment.	A	Diatom-rich sediment			AWEL	31-MAY-02	TMCM	13-MAR-19		Unlithified material with >20% diatoms. Composition & size of non-diatom material not defined.	C
499	DIFO	Diorite, foliated	U	Foliated diorite	foliated		AWEL	14-MAY-02	TMCM	31-AUG-18		Coarse-grained, av. between 2-16mm normal crystalline intrusive rock; quartz <5% of QAPF, feldspar >90% plagioclase (<50% An), +/- mica/pyroxene/amphibole/olivine. <5mm planar texture/structure from preferred orientation of platy/prismatic minerals.	C
500	DIHB	Diorite, hornblende-biotite	U	Hornblende-biotite diorite	hornblende	biotite	AWEL	17-DEC-04	TMCM	31-AUG-18		Coarse-grained, av. between 2-16mm normal crystalline intrusive rock; quartz <5% of QAPF, feldspar >90% plagioclase (<50% An), hornblende	C
501	DIOL	Diorite, olivine	U	Olivine diorite	olivine		GRBA	24-FEB-00	TMCM	31-AUG-18		Coarse-grained, av. between 2-16mm normal crystalline intrusive rock; quartz <5% of QAPF, feldspar >90% plagioclase (<50% An), olivine 5-20%, +/- mica/amphibole/pyroxene	C
502	DIR	Dioritic-rock - A type of coarse-grained normal crystalline rock. In the Rock Classification Scheme, this class includes diorite, monzodiorite, and similar rocks. The term may be used as a field classification when an accurate mineral mode from thin section examination is not available. British Geological Survey Research Report RR/99/06, section 5.1 and figs. 9, 10.	A	Dioritic-rock			GRBA	24-FEB-00	TMCM	22-FEB-19		Coarse-grained, av. between 2-16mm normal crystalline intrusive rock; quartz <20% or felspathoids <10% of QAPF, feldspar >65% plagioclase (<50% An), +/- mica/pyroxene/amphibole/olivine	C
503	DIRAP	Diorite, appinitic	U	Appinitic diorite	appinitic		AWEL	07-OCT-03	TMCM	31-AUG-18		Coarse-grained, av. between 2-16mm normal crystalline intrusive rock; quartz <5% of QAPF, feldspar >90% plagioclase (<50% An), +/- mica/pyroxene/amphibole/olivine. Coarse-grained euhedral hornblende in anhedral to poikilitic feldspar matrix.	C
504	DIRG	Dioritic-rock, gneissose	U	Gneissose dioritic-rock	gneissose		AWEL	21-JAN-02	TMCM	31-AUG-18		Medium-coarse grained 0.25-16mm, >5mm irregular/discontinuous layers of contrasting texture/grainsize/mineralogy, preferred min orientation. Dioritic-rock protolith; quartz <20% or foid <10% of QAPF, feld >65% plag (<50% An), +/- mica/Px/amphibole/oliv.	C
505	DIRRAP	Dioritic-rock, appinitic	U	Appenitic dioritic-rock	appenitic		DJLO	25-SEP-06	TMCM	31-AUG-18	I	Not Available	C

Displaying rows 486 to 505 of 3025