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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 2286 to 2305 of 3025

Row	CODE	DESCRIPTION	RCS_STATUS	TRANSLATION	Q1	Q2	USER_ENTERED	DATE_ENTERED	USER_UPDATED	DATE_UPDATED	TRANSFER	DEFINITION_BKING	STATUS
2286	PNTEP	Phonolitic-tephrite - A type of tephritic-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 13 of the quartz - alkali feldspar - plagioclase - feldspathoid (QAPF) diagram. Phonolitic-basanite and phonolitic-tephrite are distinguished by the amount of olivine in the CIPW norm: if normative olivine is less than 10% the rock is phonolitic-tephrite. British Geological Survey Research Report RR/99/06, section 5.2 and figs. 17a, 19.	R	Phonolitic-tephrite			GRBA	24-FEB-00	TMCM	22-FEB-19		Fine-grained, av. <0.25mm normal crystalline extrusive/intrusive rock; feldspathoids 10-60% of QAPF, feldspar 50-90% plagioclase, olivine <10%	C
2287	PNTEPT	Phono-tephrite - A type of tephritic-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 phono-tephrite is as shown in British Geological Survey Research Report RR/99/06, section 5.2 and figs. 17b, 20.	R	Phono-tephrite			GRBA	24-FEB-00	TMCM	22-FEB-19		Fine-grained, av. <0.25mm normal crystalline extrusive/intrusive rock; TAS SiO2 45-53wt%, Na2O+K2O 7.3-11.5wt%	C
2288	PORCEL	Porcellanite - A type of siliceous rock. It usually has a porosity of 15 to 30%. Porcellanites have the texture, lustre and conchoidal fracture of porcelain. They can be further classified as opaline-porcellanite and quartzose-porcellanite according to the type of silica. It may not be possible to accurately use this classification without X-ray analysis. British Geological Survey Research Report RR/99/03, section 8.2 and fig. 12.	R	Porcellanite			GRBA	24-FEB-00	TMCM	08-MAR-19		Non-clastic siliceous sedimentary rock with >50% silica of biogenic or chemical origin, porosity 15 to 30% with texture, lustre & conchoidal fracture of porcelain. Amorphous to cryptocrystalline, <0.004mm silica.	C
2289	POYHST	Polyhalite-stone - A type of non-carbonate salt that is composed of particles of the sulphate mineral polyhalite. British Geological Survey Research Report RR/99/03, section 7.1 and fig. 11.	R	Polyhalite-stone			GRBA	24-FEB-00	TMCM	08-MAR-19		Sedimentary rock crystals >50% non-carbonate salt sulphate dominanlty polyhalite (K2MgCa2(SO4)4.2H2O). Pink/red triclinic crystals, compact lamellar masses. Crystal size not defined.	C
2290	PPHY	Porphyry - A type of fine-grained normal crystalline rock. It is a rock containing phenocrysts and with an aphanitic groundmass of indeterminate origin. British Geological Survey Research Report RR/99/06, section 8.3.	A	Porphyry			GRBA	24-FEB-00	TMCM	22-FEB-19		Porphyritic textured crystalline intrusive rock with aphanitic groundmass ( <0.032mm); composition of groundmass & phenocrysts not defined	C
2291	PPHYF	Feldspar-porphyry	N	Feldspar-porphyry			GRBA	24-FEB-00	TMCM	31-AUG-18		Porphyritic normal crystalline intrusive/extrusive rock with aphanitic, (av.< 0.25mm) groundmass; feldspar as phenocrysts 5-20% composition not defined	C
2292	PROCAT	Protocataclasite - A type of cataclastic-rock. In the Rock Classification Scheme, it is one in which fragments significantly coarser than the matrix comprise more than 50% by volume of the rock. British Geological Survey Research Report RR/99/02, section 7.2 and table 4.	R	Protocataclasite			GRBA	24-FEB-00	TMCM	22-FEB-19		Deformed (brittle), unfoliated rock with primary cohesion (protolith undefined) comprising >50% fragments in a finer grained matrix, grain size reduction by mechanical fragmentation +/- recrystallisation of matrix. Porphyroclasts monomineral fragments.	C
2293	PROMYL	Protomylonite - A type of mylonitic-rock. In the Rock Classification Scheme, it is one in which porphyroclasts comprise more than 50% by volume of the rock. British Geological Survey Research Report RR/99/02, section 7.3 and table 5.	R	Protomylonite			GRBA	24-FEB-00	TMCM	22-FEB-19		Deformed (ductile), intensely foliated rock (protolith undefined) with primary cohesion, containing >50% porphyroclasts (commonly lensoid) in a finer grained dynamically recrystallised matrix	C
2294	PRPTST	Pitchstone, porphyritic-rhyolitic	U	Porphyritic-rhyolitic pitchstone	porphyritic	rhyolitic	AWEL	31-JAN-01	TMCM	31-AUG-18		Not Available	C
2295	PRY	Rhyolite, porphyritic	U	Porphyritic rhyolite	porphyritic		AWEL	21-MAY-02	TMCM	31-AUG-18		Not Available	C
2296	PRYDA	Rhyodacite, porphyritic	U	Porphyritic rhyodacite	Porphyritic		TMCM	29-MAY-20			I	Not Available	O
2297	PS	Peat, sandy [Unlithified Deposits Coding Scheme]	U	Sandy peat [UDCS]	sandy		AWEL	09-JAN-02	TMCM	30-AUG-18		Not Available	C
2298	PSAD	Psammite, dolomitic	U	Dolomitic psammite	dolomitic		AWEL	25-SEP-00	TMCM	31-AUG-18		Not Available	C
2299	PSAMB	Psammite, banded	U	Banded psammite	banded		AWEL	13-FEB-03	TMCM	31-AUG-18		Metasedimentary rock (grain size & protolith undefined) with impersistant <5mm layering; modal composition <10% calc-silicate/carbonate minerals, >80% Q+F,<20% other minerals (micas/chlorite/garnet/cordierite/staurolite/Al-silicate minerals)	C
2300	PSAMF	Psammite, flaggy	U	Flaggy psammite	flaggy		DJLO	20-JUN-06	TMCM	30-AUG-18	I	Not Available	C
2301	PSAMG	Psammite, gritty	U	Gritty psammite	gritty		DJLO	21-JUN-06	TMCM	30-AUG-18	I	Not Available	C
2302	PSAMGF	Psammite, foliated-gritty	U	Gritty, foliated psammite	gritty	foliated	DJLO	20-JUN-06	TMCM	30-AUG-18	I	Not Available	C
2303	PSAMI	Psammite, micaceous	U	Micaceous psammite	micaceous		GRBA	24-FEB-00	TMCM	31-AUG-18		Not Available	C
2304	PSAMIF	Psammite, micaceous-flaggy	U	Flaggy micaceous psammite	flaggy	micaceous	DJLO	20-JUN-06	TMCM	30-AUG-18	I	Not Available	C
2305	PSAML	Psammite, laminated	U	Laminated psammite	laminated		AWEL	13-FEB-03	TMCM	31-AUG-18		Not Available	C

Displaying rows 2286 to 2305 of 3025