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 561 to 580 of 3025

Row	CODE	DESCRIPTION	RCS_STATUS	TRANSLATION	Q1	Q2	Q3	USER_ENTERED	DATE_ENTERED	USER_UPDATED	DATE_UPDATED	DEFINITION_BKING	STATUS
561	DURI	Duricrust - A type of residual deposit. It is a general term for a hard crust on the surface of, or layer in, the upper horizons of a soil in a semiarid climate. It is an indurated product of surface and near-surface processes formed by cementation or replacement of bedrock, weathering deposits, unconsolidated sediments, soil or other materials produced by low-temperature physiochemical processes. British Geological Survey Research Report RR/99/03, section 13.6; RR/99/04, appendix 2.	R	Duricrust				GRBA	24-FEB-00	TMCM	13-MAR-19	Rudaceous pedogenic sedimentary rock. Clasts >50% from pre-existing siliceous rocks, cemented by calcium carbonate & >50% or predominantly gravel-grade, >2mm. Formed on/in upper soil layers in semi-arid areas. See calcrete/caliche/ferricrete/silcrete.	C
562	ECLOG	Eclogite - A type of metamorphic rock with unknown protolith based on modal composition. In the Rock Classification Scheme, it is defined as a rock composed of more than 70% garnet and jadeitic clinopyroxene (omphacite). Eclogites do not contain plagioclase. They may contain other anhydrous minerals such as quartz, kyanite, orthopyroxene and rutile, together forming no more than 30% of the rock. Eclogites result from metamorphism of basaltic or gabbroic igneous rocks under very low P.H₂0 producing anhydrous mineral assemblages. They define a unique eclogite facies metamorphism, typically reflecting very high pressures although their local occurrence within amphibolite facies rocks suggests they may be formed over a significant range of pressure. British Geological Survey Research Report RR/99/02, section 6.2.	R	Eclogite				GRBA	24-FEB-00	TMCM	22-FEB-19	Red & green crystalloblastic metamorphic rock (protolith undefined); >70% Mg-rich garnet & jadeitic clinopyroxene (omphacite), <30% anhydrous minerals, quartz/kyanite/orthopyroxene/rutile, no plagioclase	C
563	ECR	Exotic crystalline igneous rock - These are the chemically and/or mineralogically exotic crystalline igneous rocks. In the Rock Classification Scheme, this class includes carbonatite, melilitic rock, kalsilitic rock, kimberlite, lamproite, leucitic rock, and lamprophyre. Rocks in these groups have sufficiently unusual mineral and chemical compositions that they are not classified using the modal (QAPF and ultramafic diagrams) or chemical (e.g. TAS) methods by which normal crystalline igneous rocks are classified. Although they comprise only a tiny proportion of all crystalline igneous rocks, the unusual characteristics and distinctive field settings of the exotic igneous rocks means they have attracted a large amount of attention from geologists. British Geological Survey Research Report RR/99/06, section 1.3 and fig. 1.	A	Exotic crystalline igneous rock				AWEL	08-JUN-01	TMCM	22-FEB-19	Crystalline intrusive/extrusive rock, chemically & mineralogically exotic, crystal size not defined, includes very small volume of igneous rocks; carbonatites, melilitic, kalsilitic, leucitic rocks, kimberlites, lamproites, lamprophyres	C
564	EFLUE	Effluent - A type of artifical deposit. It consists of waste liquid flowing from a sewage tank or industrial process etc. British Geological Survey Research Report RR/99/04, appendix 1.	R	Effluent				GRBA	24-FEB-00	TMCM	13-MAR-19	Not Available	C
565	FAREN	Feldspathic-arenite - A type of arenite. In the Rock Classification Scheme, it is defined as shown in British Geological Survey Research Report RR/99/03, section 2.2 and figs. 3, 4.	R	Feldspathic-arenite				GRBA	24-FEB-00	TMCM	08-MAR-19	Siliciclastic arenaceous sedimentary rock <15% matrix (particles<0.032mm). Grains quartz <75%, feldspar >25% & rock fragments <50% of quartz+feldspar+rock fragments.	C
566	FBAFSY	Foid-bearing-alkali-feldspar-syenite - A type of syenitic-rock. In the Rock Classification Scheme, it is a coarse-grained crystalline igneous rock whose mineral mode plots in field 6' of the quartz - alkali feldspar - plagioclase - feldspathoid (QAPF) diagram. British Geological Survey Research Report RR/99/06, section 5.1 and figs. 9, 11, 12.	R	Foid-bearing-alkali-feldspar-syenite				GRBA	24-FEB-00	TMCM	22-FEB-19	Coarse-grained, av. between 2-16mm normal crystalline intrusive rock; feldspathoids <10% of QAPF, feldspar >90% alkali feldspar, +/- mica/amphibole	C
567	FBAFTR	Foid-bearing-alkali-feldspar-trachyte - A type of trachytic-rock. In the Rock Classification Scheme, this name is used for a fine-grained crystalline igneous rock when the modal mineralogy is available, and the mineral mode plots in field 6' of the quartz - alkali feldspar - plagioclase - feldspathoid (QAPF) diagram. British Geological Survey Research Report RR/99/06, section 5.2 and figs. 17a, 19.	R	Foid-bearing-alkali-feldspar-trachyte				GRBA	24-FEB-00	TMCM	22-FEB-19	Fine-grained, av. <0.25mm normal crystalline extrusive/intrusive rock; feldspathoids <10% of QAPF, feldspar >90% alkali feldspar	C
568	FBANO	Foid-bearing-anorthosite - A type of anorthositic-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. Foid-bearing-diorite, foid-bearing-gabbro and foid-bearing-anorthosite are separated according to the average composition of their plagioclase and the proportion of mafic minerals (M): if M is less than 10% the rock is foid-bearing-anorthosite. British Geological Survey Research Report RR/99/06, section 5.1 and figs. 9, 11, 12.	R	Foid-bearing-anorthosite				GRBA	24-FEB-00	TMCM	22-FEB-19	Coarse-grained, av. between 2-16mm normal crystalline intrusive rock; CI M<10%; feldspathoids <10% of QAPF, feldspar dominant >90% plagioclase +/- mica/pyroxene/amphibole/olivine	C
569	FBDI	Foid-bearing-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. Foid-bearing-diorite, foid-bearing-gabbro and foid-bearing-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 foid-bearing-diorite. British Geological Survey Research Report RR/99/06, section 5.1 and figs. 9, 11, 12.	R	Foid-bearing-diorite				GRBA	24-FEB-00	TMCM	22-FEB-19	Coarse-grained, av. between 2-16mm normal crystalline intrusive rock; feldspathoids <10% of QAPF, feldspar >90% plagioclase (<50% An) +/- mica/pyroxene/amphibole/olivine	C
570	FBGB	Foid-bearing-gabbro - A type of gabbroic-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. Foid-bearing-diorite, foid-bearing-gabbro and foid-bearing-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 greater than 50% the rock is foid-bearing-gabbro. British Geological Survey Research Report RR/99/06, section 5.1 and figs. 9, 11, 12.	R	Foid-bearing-gabbro				GRBA	24-FEB-00	TMCM	22-FEB-19	Coarse-grained, av. between 2-16mm normal crystalline intrusive rock; feldspathoids <10% of QAPF, feldspar >90% plagioclase (>50% An), plagioclase 10-90% , pyroxene 5-90% (>5% orthopyroxene), olivine >5% of Plag+Px+Ol, +/- amphibole	C
571	FBLA	Foid-bearing-latite - A type of trachytic-rock. In the Rock Classification Scheme, this name is used for a fine-grained crystalline igneous rock when the modal mineralogy is available, and the mineral mode plots in field 8' of the quartz - alkali feldspar - plagioclase - feldspathoid (QAPF) diagram. British Geological Survey Research Report RR/99/06, section 5.2 and figs. 17a, 19.	R	Foid-bearing-latite				GRBA	24-FEB-00	TMCM	22-FEB-19	Fine-grained, av. <0.25mm normal crystalline extrusive/intrusive rock; feldspathoids <10% of QAPF, feldspar 35-65% alkali feldspar	C
572	FBMGN	Metamelagranite, foliated-biotite	U	Foliated-biotite metamelagranite	meta	foliated	biotite	AWEL	10-JUN-02	TMCM	31-AUG-18	Mela-granite protolith, coarse-grained, 2-16mm, darker than ave., M>20% normal crystalline intrusive, rock; qtz 20-60% of QAPF, feld 35-90% alkali feld, +/-amph. 5-20% biotite. <5mm planar structure from preferred orientation of platy/prismatic minerals.	C
573	FBMZ	Foid-bearing-monzonite - A type of syenitic-rock. In the Rock Classification Scheme, it is a coarse-grained crystalline igneous rock whose mineral mode plots in field 8' of the quartz - alkali feldspar - plagioclase - feldspathoid (QAPF) diagram. British Geological Survey Research Report RR/99/06, section 5.1 and figs. 9, 11, 12.	R	Foid-bearing-monzonite				GRBA	24-FEB-00	TMCM	22-FEB-19	Coarse-grained, av. between 2-16mm normal crystalline intrusive rock; feldspathoids <10% of QAPF, feldspar 35-65% plagioclase +/- mica/pyroxene/amphibole/olivine	C
574	FBMZDI	Foid-bearing-monzodiorite - A type of dioritic-rock. In the Rock Classification Scheme, it is a coarse-grained crystalline igneous rock whose mineral mode plots in field 9' of the quartz - alkali feldspar - plagioclase - feldspathoid (QAPF) diagram. Foid-bearing-monzodiorite and foid-bearing-monzogabbro are separated according to the average composition of their plagioclase: if An (the anorthite content of plagioclase) is less than 50% the rock is foid-bearing-monzodiorite. British Geological Survey Research Report RR/99/06, section 5.1 and figs. 9, 11, 12.	R	Foid-bearing-monzodiorite				GRBA	24-FEB-00	TMCM	22-FEB-19	Coarse-grained, av. between 2-16mm normal crystalline intrusive rock; feldspathoids <10% of QAPF, feldspar 65-90% plagioclase (<50% An) +/- mica/pyroxene/amphibole/olivine	C
575	FBMZGB	Foid-bearing-monzogabbro - A type of gabbroic-rock. In the Rock Classification Scheme, it is a coarse-grained crystalline igneous rock whose mineral mode plots in field 9' of the quartz - alkali feldspar - plagioclase - feldspathoid (QAPF) diagram. Foid-bearing-monzodiorite and foid-bearing-monzogabbro are separated according to the average composition of their plagioclase: if An (the anorthite content of plagioclase) is greater than 50% the rock is foid-bearing-monzogabbro. British Geological Survey Research Report RR/99/06, section 5.1 and figs. 9, 11, 12.	R	Foid-bearing-monzogabbro				GRBA	24-FEB-00	TMCM	22-FEB-19	Coarse-grained, av. between 2-16mm normal crystalline intrusive rock; feldspathoids <10% of QAPF, feldspar 65-90% plagioclase (>50% An) +/- mica/pyroxene/amphibole/olivine	C
576	FBRC	Fault-breccia - A type of mechanically broken rock without primary cohesion. In the Rock Classification Scheme, a fault-breccia is not foliated, and contains angular to rounded fragments that comprise more than 30% of the rock which are significantly coarser than the matrix, and are composed of mechanically broken rock fragments and/or mineral grains. British Geological Survey Research Report RR/99/02, section 7.1 and table 3.	R	Fault-breccia				GRBA	24-FEB-00	TMCM	22-FEB-19	Deformed (brittle), unfoliated rock; no primary cohesion, (protolith undefined) in which angular/rounded fragments (>30%) are significantly coarser (>0.25mm) than the matrix	C
577	FBSY	Foid-bearing-syenite - A type of syenitic-rock. In the Rock Classification Scheme, it is a coarse-grained crystalline igneous rock whose mineral mode plots in field 7' of the quartz - alkali feldspar - plagioclase - feldspathoid (QAPF) diagram. British Geological Survey Research Report RR/99/06, section 5.1 and figs. 9, 11, 12.	R	Foid-bearing-syenite				GRBA	24-FEB-00	TMCM	22-FEB-19	Coarse-grained, av. between 2-16mm normal crystalline intrusive rock; feldspathoids <10% of QAPF, feldspar 65-90% alkali feldspar +/- mica/amphibole	C
578	FBTR	Foid-bearing-trachyte - A type of trachytic-rock. In the Rock Classification Scheme, this name is used for a fine-grained crystalline igneous rock when the modal mineralogy is available, and the mineral mode plots in field 7' of the quartz - alkali feldspar - plagioclase - feldspathoid (QAPF) diagram. British Geological Survey Research Report RR/99/06, section 5.2 and figs. 17a, 19.	R	Foid-bearing-trachyte				GRBA	24-FEB-00	TMCM	22-FEB-19	Fine-grained, av. <0.25mm normal crystalline extrusive/intrusive rock; feldspathoids <10% of QAPF, feldspar 65-90% alkali feldspar	C
579	FCMST	Mudstone, friable, calcareous	U	Friable calcareous mudstone	friable	calcareous		AWEL	10-JUN-02	TMCM	31-AUG-18	Siliciclastic sedimentary rock that crumbles or abrades easily. Particles, >50% or predominantly mud-grade, <0.032mm. 5-20% unspecified primary carbonate.	C
580	FDGB	Foid-gabbro - A type of foid-gabbroic-rock. In the Rock Classification Scheme, it is a coarse-grained crystalline igneous rock whose mineral mode plots in field 14 of the quartz - alkali feldspar - plagioclase - feldspathoid (QAPF) diagram. Foid-diorite and foid-gabbro are distinguished according to the average composition of their plagioclase: if An (the anorthite content of plagioclase) is greater than 50% the rock is foid-gabbro. British Geological Survey Research Report RR/99/06, section 5.1 and figs. 9, 11, 12.	R	Foid-gabbro				GRBA	24-FEB-00	TMCM	22-FEB-19	Coarse-grained, av. Between 2-16mm normal crystalline intrusive rock; feldspathoids 10-60% of QAPF, feldspar >90% plagioclase (>50% An) +/- mica/amphibole/pyroxene/olivine	C

Displaying rows 561 to 580 of 3025