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 2746 to 2765 of 3025

Row	CODE	DESCRIPTION	RCS_STATUS	TRANSLATION	Q1	Q2	USER_ENTERED	DATE_ENTERED	USER_UPDATED	DATE_UPDATED	TRANSFER	DEFINITION_BKING	STATUS
2746	TROCT	Troctolite - A type of gabbro. In the Rock Classification Scheme, it is a gabbro with plagioclase 10 - 90%, pyroxene >5% and olivine 5 - 85% of plagioclase + pyroxene + olivine. British Geological Survey Research Report RR/99/06, section 5.1 and figs. 13, 14.	R	Troctolite			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), modal plagioclase 10-90%, pyroxene >5%, olivine 5-85% of Plag+Px+Ol, +/-mica/amphibole	C
2747	TRONA	Trona - A type of Na carbonate sedimentary rock. Trona (Na₂CO₃.NaHCO₃.2H₂O) is characterised by monoclinic crystals that form in fibrous or columnar layers and masses. British Geological Survey Research Report RR/99/03, section 3.3.	A	Trona			GRBA	24-FEB-00	TMCM	08-MAR-19		Primary sodium carbonate precipitate. Na2CO3.NaHCO3.2H2O crystals monoclinic, fibrous or columnar layers & masses. No unlithified equivalent. Crystal size not defined. An evaporite.	C
2748	TRR	Trachytic-rock - A type of felsite. In the Rock Classification Scheme, this class includes trachyte, latite and similar rocks. The term may be used as a field classification when an accurate mineral mode from thin section examination, or a chemical analysis, is not available. British Geological Survey Research Report RR/99/06, section 5.2 and figs. 17, 18.	A	Trachytic-rock			GRBA	24-FEB-00	TMCM	22-FEB-19		Fine-grained, av. <0.25mm normal crystalline extrusive/intrusive rock; quartz <20% or felspathoid <10% of QAPF, feldspar >35% alkali feldspar, TAS SiO2 57.6-69wt%, Na2O+K2O >7wt%; normative quartz <20%	C
2749	TRRT	Trachytic-rock (TAS)	-	Trachytic-rock (TAS)			AWEL	17-DEC-04	TMCM	24-AUG-18		Fine-grained, av. <0.25mm normal crystalline extrusive/intrusive rock; TAS SiO2 57.6-69wt%, Na2O+K2O >7wt%; normative quartz <20%	O
2750	TRT	Trachyte (TAS) - A type of trachytic-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 trachyte (TAS) is as shown in British Geological Survey Research Report RR/99/06, section 5.2 and figs. 17b, 20.	R	Trachyte (TAS)			GRBA	24-FEB-00	TMCM	22-FEB-19		Fine-grained, av. <0.25mm normal crystalline extrusive/intrusive rock; TAS SiO2 57.6- 69wt%, Na2O+K2O >7wt%; normative quartz <20%	C
2751	TRTUF	Tuff, trachytic	U	Trachytic tuff	trachytic		AWEL	22-MAY-02	TMCM	31-AUG-18		Lithified clastic material >10% debris formed by volcanic processes, >75vol% pyroclastic fragments, >75% ash <2mm; quartz <5% of QAPF, feldspar 65-90% alkali feldspar	C
2752	TUF	Tuff - A type of pyroclastic-rock. In the Rock Classification Scheme, it is a pyroclastic-rock in which the average size of more than 75% of the pyroclastic fragments is less than 64 mm. Lapillistone, lapilli-tuff, and tuff are separated according to the relative proportion of lapilli-grade (2 - 64 mm) and ash-grade (<2 mm) fragments: if less than 25% of the fragments are lapilli the rock is tuff. It is the consolidated equivalent of ash. British Geological Survey Research Report RR/99/06, section 4.2 and fig. 4.	R	Tuff			GRBA	24-FEB-00	TMCM	15-FEB-19		Lithified clastic material >10% debris formed by volcanic processes, >75vol% pyroclastic fragments, >75% ash <2mm, composition not defined	C
2753	TUFA	Tufa - A type of chemical deposit (natural superficial). It is a sedimentary rock composed of calcium carbonate or silica, formed by evaporation as a thin, surficial, soft, spongy, semifriable encrustation around the mouth of springs, seeps or along streams carrying calcium carbonate in solution, and exceptionally as a thick deposit along lake shores. Travertine is a hard, dense variety of tufa; it also occurs in caves as stalactites and stalagmites. British Geological Survey Research Report RR/99/03; RR/99/04, appendix 2 and tables 5, 17. Synonyms: sinter, travertine.	R	Tufa			GRBA	24-FEB-00	TMCM	13-MAR-19		Thin, surficial, soft, spongy, semifriable, crystalline incrustation around the mouth of springs, seeps or streams carrying calcium carbonate in solution & exceptionally as thick deposits along lakeshores. Tufa-limestone.	C
2754	TUFBRC	Tuff-breccia - A type of pyroclastic-rock. In the Rock Classification Scheme, it is a pyroclastic-rock which contains more than 25% of each of the main pyroclastic fragment size divisions: blocks and bombs (>64 mm), lapilli (2 - 64 mm), and ash (<2 mm). It is the consolidated equivalent of ash-breccia. British Geological Survey Research Report RR/99/06, section 4.2 and fig. 4.	R	Tuff-breccia			GRBA	24-FEB-00	TMCM	15-FEB-19		Lithified poorly sorted clastic material >10% debris formed by volcanic processes, <75vol% pyroclastic fragments, ash, <75% <2mm, <75% lapilli, 64-2mm & <75% blocks/bombs, >64mm, coposition not defined	C
2755	TUFCA	Tuff, calcareous	U	Calcareous tuff	calcareous		AWEL	07-OCT-03	TMCM	31-AUG-18		Not Available	C
2756	TUFCB	Tuff, calcareous-basaltic	U	Calcareous-basaltic tuff	calcareous	basaltic	AWEL	28-JAN-02	TMCM	31-AUG-18		Not Available	C
2757	TUFCY	Tuff, crystal	U	Crystal tuff	crystal		AWEL	17-DEC-04	TMCM	31-AUG-18		Lithified clastic material >10% debris formed by volcanic processes; >75vol% pyroclastic fragments, >75% ash <2mm; crystals or crystal fragments >33%, pumice/glass <50% & rock fragments <50%	C
2758	TUFIST	Tuffisite - A type of intrusion-breccia. It comprises brecciated and lithified country-rock fragments found in intrusive pipes which are formed by the explosive release of gas. British Geological Survey Research Report RR/99/06, section 8.2.	R	Tuffisite			GRBA	24-FEB-00	TMCM	15-FEB-19		Normal/exotic intrusive fragmental igneous with country-rock in"pipes" formed by explosive gas release	C
2759	TUFLI	Tuff, lithic	U	Lithic tuff	lithic		AWEL	17-DEC-04	TMCM	31-AUG-18		Lithified clastic material >10% debris formed by volcanic processes; >75vol% pyroclastic fragments, >75% ash <2mm, rock fragments >33%, pumice/glass <50%, crystals/crystal fragments <50%; a pyroclastic rock	C
2760	TUFT	Tuffite - A type of volcaniclastic igneous rock and sediment. In the Rock Classification Scheme, tuffite is a general term for volcaniclastic rocks and sediments which consist of 25 - 75% by volume pyroclastic fragments. The class includes tuffaceous-sedimentary-rock, and tuffaceous-sediment. British Geological Survey Research Report RR/99/06, section 4.2 and figs. 1, 4.	A	Tuffite			GRBA	24-FEB-00	TMCM	15-FEB-19		Clastic material >10vol% volcanic debris, pyroclastic fragments 25-75vol%; size/lithification/composition not defined	C
2761	TUFTM	Tuffite, mafic	U	Mafic tuffite	mafic		DJLO	05-JUN-06	TMCM	31-AUG-18	I	Not Available	C
2762	TUFVI	Tuff, vitric	U	Vitric tuff	vitric		AWEL	17-DEC-04	TMCM	31-AUG-18		Lithified clastic material >10vol% debris formed by volcanic processes, >75vol% pyroclastic fragments, >75% ash, <2mm: >33% pumice/glass, <50%crystals/crystal fragments, <50% rock fragments of P,G+C,Cf+Rf	C
2763	UFPC	Unfoliated mechanically broken rock with primary cohesion - British Geological Survey Research Report RR/99/02, section 7.2.	A	Unfoliated mechanically broken rock with primary cohesion			AWEL	08-JUN-01	TMCM	22-FEB-19		Not Available	C
2764	ULCAT	Ultracataclasite - A type of cataclastic-rock. In the Rock Classification Scheme, it is one in which fragments significantly coarser than the matrix comprise less than 10% by volume of the rock. British Geological Survey Research Report RR/99/02, section 7.2 and table 4.	R	Ultracataclasite			GRBA	24-FEB-00	TMCM	22-FEB-19		Deformed (brittle), unfoliated rock with primary cohesion (protolith unidentifiable) comprising <10% fragments, (porphyroclasts if monomineral), in a finer grained matrix, grain size reduction by mechanical fragmentation +/- recrystallisation of matrix.	C
2765	ULEXST	Ulexite-stone - A type of non-carbonate salt that is composed of particles of the borate mineral ulexite. British Geological Survey Research Report RR/99/03, section 7.1 and fig. 11.	R	Ulexite-stone			GRBA	24-FEB-00	TMCM	08-MAR-19		Sedimentary rock crystals >50% non-carbonate salt, borate, dominanlty ulexite (NaCaB5O9.8H2O). White globular mineral, internal fibrous structure. Crystal size not defined.	C

Displaying rows 2746 to 2765 of 3025