Vocabularies — view dictionary terms

DIC_ROCK_ALL (3677 rows)
Dictionary table based on the entire version 3 of the BGS Rock Classification Scheme and is populated directly from the 3 supplying tables (BGS.ROCK_NAME_V3, BGS.ROCK_COMPOSITE and BGS.DIC_ROCK_DUMMY). It contains both the base rock names and addditional codes required for specific application, eg. composite names for use on digital geological maps. It is formally approved as the official source of ALL database codes to be used in BGS corporate databases and MUST be followed.

Displaying rows 2238 to 2257 of 3677

Row	CODE	SOURCE_CODE	DESCRIPTION	TRANSLATION	STATUS	USER_ENTERED	DATE_ENTERED	USER_UPDATED	DATE_UPDATED	TRANSFER	RCS_STATUS
2238	MQZP	RN	Metaquartz-porphyry	Metaquartz-porphyry	C	AWEL	21-JAN-02	TMCM	31-AUG-18		N
2239	MR	RN	Mafic-rock	Mafic-rock	C	AWEL	24-JAN-02	TMCM	31-AUG-18		N
2240	MRADLR	RN	Metaradiolarite	Metaradiolarite	C	AWEL	31-JUL-02	TMCM	31-AUG-18		N
2241	MRADOZ	RN	This dictionary entry was unnecessary and has been deleted. The code is retained to prevent its re-use in future.	Dictionary entry deleted	O	AWEL	20-AUG-02	TMCM	27-MAY-20		-
2242	MRC	RN	Contact metamorphic rock - Contact metamorphism results from the temperature perturbation associated with the emplacement of magma into the crust. The extent of the thermal perturbation will be determined by both the crustal level at which the magma was emplaced and the volume of the magma body; contact metamorphism will merge into regional metamorphism when a large body of magma is emplaced at greater depths. In many cases, contact metamorphism is not accompanied by recognisable tectonic effects, with the result that new mineral assemblages develop granoblastic textures. The amount of recrystallisation and the associated metamorphic mineral assemblages are largely a product of a combination of the heat energy available, nature and volume of fluid flow, lithology of the country rock and the distance from the heat source. A gabbroic magma is hotter than a granite magma and so would be expected to produce greater recrystallisation with higher temperature minerals. With increasing recrystallisation granoblastic textures progressively develop so that pre-existing features in the rock are destroyed, ultimately resulting in hard, fine- to medium-grained rocks lacking parting surfaces. Preexisting features such as schistose or gneissose textures may be recognised by lithological heterogeneities. British Geological Survey Research Report RR/99/02, section 9.6.	Contact metamorphic rock	C	AWEL	23-MAY-02	TMCM	22-FEB-19		A
2243	MRCCBM	RN	Metasedimentary rock composed largely of calcsilicate and/or carbonate minerals - A class within metasedimentary rock based on modal composition. In the Rock Classification Scheme, these are metamorphic rocks containing more than 50% calcsilicate and/or carbonate minerals. This class includes calcsilicate-rock, and metacarbonate-rock. British Geological Survey Research Report RR/99/02, section 3.2 and figs. 6, 7.	Metasedimentary rock composed largely of calcsilicate and/or carbonate minerals	C	AWEL	23-MAY-02	TMCM	22-FEB-19		A
2244	MRDROC	RN	Siliciclastic rudaceous metarock	Siliciclastic rudaceous metarock	C	GRBA	24-FEB-00	TMCM	30-AUG-18		N
2245	MRDSD	RN	This dictionary entry was unnecessary and has been deleted. The code is retained to prevent its re-use in future.	Dictionary entry deleted	O	AWEL	22-JUL-02	TMCM	27-MAY-20		-
2246	MRG	RN	Mafic-rock, gneissose	Gneissose mafic-rock	C	AWEL	30-JUL-02	TMCM	31-AUG-18		U
2247	MRH	RN	Mafic-rock, hornfelsed	Hornfelsed mafic-rock	C	AWEL	29-APR-04	TMCM	31-AUG-18		U
2248	MRI	RN	Impact metamorphic rock - A type of metamorphic rock.	Impact metamorphic rock	C	AWEL	23-MAY-02	TMCM	22-FEB-19		A
2249	MROC	RN	Rock, mineralized - This term is used for any rock showing a significant degree of mineralization.	Mineralized rock	C	DJLO	25-JUL-06	TMCM	13-MAR-19	I	N
2250	MRPC	RN	Mechanically broken rock without primary cohesion - In the Rock Classification Scheme, this class is subdivided into fault-breccia, and fault-gouge, according to the proportion of visible fragments within a finer-grained matrix. The abundance and size of the fragments depends on the original character of the rock and also the rate and duration of movement. The resulting rocks range from coarse breccias with limited disruption of the original rock to fine gouge where the rock is largely reduced to paste. Any cohesion is the result of secondary cementation. Such rocks invariably form at low confining pressures. British Geological Survey Research Report RR/99/02, section 7.1.	Mechanically broken rock without primary cohesion	C	AWEL	08-JUN-01	TMCM	22-FEB-19		A
2251	MRQFM	RN	Metasedimentary rock composed largely of quartz, feldspar and mica - A class within metasedimentary rock based on modal composition. In the Rock Classification Scheme, this class includes quartzite, psammite, semipelite, and pelite. British Geological Survey Research Report RR/99/02, section 3.2 and figs. 5, 6.	Metasedimentary rock composed largely of quartz, feldspar and mica	C	AWEL	23-MAY-02	TMCM	22-FEB-19		A
2252	MRRM	RN	Metamorphosed rock of restricted mineralogy	Metamorphosed rock of restricted mineralogy	C	AWEL	28-JAN-02	TMCM	30-AUG-18		N
2253	MRUD	RN	Metarudite (psephite)	Metarudite (Psephite)	C	AWEL	03-JUL-01	TMCM	31-AUG-18		N
2254	MRY	RN	Metarhyolite	Metarhyolite	C	GRBA	24-FEB-00	TMCM	30-AUG-18		N
2255	MRYAG	RN	Meta-agglomerate, rhyolitic	Rhyolitic meta-agglomerate	C	AWEL	05-SEP-02	TMCM	31-AUG-18		U
2256	MRYCM	RN	Metarhyolite, comenditic	Comenditic metarhyolite	C	AWEL	21-JAN-02	TMCM	30-AUG-18		N
2257	MRYP	RN	Metarhyolite, porphyritic	Porphyritic metarhyolite	C	AWEL	21-JAN-02	TMCM	31-AUG-18		U

Displaying rows 2238 to 2257 of 3677