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Journal of African Earth Sciences. The alleged kimberl- p. Nephelinitic and basa- trary mineralogical evidence. Miner- chemically distinct calciocarbonatites C1 and alogy, Geochemistry and Petrology. South African Journal of Geology. IUGS reclassification of sions to the terminology of kimberlites and the high-Mg and picritic volcanic rocks. Kimberlites and re- IUGS systematics of igneous rocks.
Kimberlites, Orange- 1 and Group-2 kimberlite petrology: Plenum Press, New a genetic model for kimberlites. Pe- ference, Perth, Australia. Geological Society trology of Lamproites. Plenum Press, New of Australia. Die quantitive mineralog- constraints. Transactions of the Geological ische Klassifikation der Eruptivgesteine. Society of South Africa. Contributions to Mineralogy and sification and nomenclature recommended Petrology. Blackie, atics of Igneous Rocks. How should char- R. Classification of volcanic rocks nockitic rocks be named?
British Geological Survey Report. To each plutonic rock Vol. Potassium-rich alkaline ternational Magazine for Geo-Scientists. Editor The Alka- Amsterdam. Descriptive nomenclature on the Systematics of Igneous Rocks. Classi- and classification of pyroclastic deposits and fication and nomenclature of volcanic rocks, fragments: Kimberlites nomenclature of volcanic rocks, lampro- near Orroroo, South Australia.
Kornprobst, phyres, carbonatites, and melilitic rocks: The compositions and element distribution. The diamond fields of The Canadian Mineralogist. Transvaal Leader, Johan- The evidence of kim- basaltic magmas: Journal part of the Earth. South African Journal of of Petrology. How- to make the list of rock names as complete as ever, varietal names have been included where possible. The initial list included all the names they have assumed a special meaning e. Additional terms in brackets are alternative This list was later extensively edited and modi- spellings, usually due to different trans- fied by suggestions from contributors and par- literations into English, often from German or ticularly when the references were checked.
Terms separated only by commas are The list published in the 1st edition contained discrete names but with the same derivations, terms which has now been extended to e. The glossary of terms also contains all the root names recommended by the 3. All these types of information: No attempt has been made to include ments on the term all igneous textural terms as some petrological 3 the author s , year and page number of the as well as mineralogical knowledge is source reference expected of the reader.
Note, how- and enclosed in brackets. Each of these five ever, that the Subcommission has not defined types of information is described in further any of these terms. Wherever poss- included in the glossary have been somewhat ible the names have been described in terms of subjective. These names earlier in the book. In this in- sion, the term has not been used in publications stance it seems rather pointless to try to guess for a long time.
In many cases the terms were what optically identified barkevikite might be. It is suggested that such names should not be used outside their local areas. This differs somewhat from many of the refer- 3. This explains some of the tions on the nomenclature of amphiboles IMA, apparent discrepancies that will be found be- ; Leake et al. The page number given with the reference is titanaugit has been changed to titanian augite.
Wherever possible the source reference is This is particularly true of the amphibole followed by information concerning the origin barkevikite, which petrologists have identified of the term, unless the derivation is obvious, optically as commonly occurring in certain e. Most rocks and terms are named alkaline rocks.
The IMA , p. Of the terms i. Russian Federation 76 The contribution of these texts has been con- a Based on the glossary entries for which siderable, although many discrepancies and information is available. For example, as can be seen in prolific individual years for the production of Table 3. The next three most prolific years, Table 3. Frequency of new rock terms and , and are also mainly due to the their references by century efforts of Johannsen.
LES NOMS DE FAMILLE LES PLUS PORTES EN FRANCE DANS LE DEPARTEMENT du BAS-RHIN entre et
Years with 20 or more new rock —99 They the contribution of new rock names from 90 60 50 30 0 0 60 80 0 20 40 60 80 0 20 40 60 80 60 80 0 20 40 60 80 0 20 40 60 80 a new rock terms b new rock terms published in English 35 30 80 25 60 20 40 15 10 20 5 0 0 60 80 0 20 40 60 80 0 20 40 60 80 60 80 0 20 40 60 80 0 20 40 60 80 c new rock terms published in German d new rock terms published in French 5 4 80 3 60 2 40 20 1 0 0 60 80 0 20 40 60 80 0 20 40 60 80 60 80 0 20 40 60 80 0 20 40 60 80 e references containing new rock terms f new rock terms per reference Fig.
Frequency with which new rocks terms and their references have appeared in the literature over year intervals from to for: The year values along the horizontal axis are the lower value for each class. The most prolific period for new rock terms Finally, the histograms of the number of new Fig. On average each publication produced Brongniart, Cordier and Pinkerton, and in the about two new rock names. The distinct peaks are present, one reflecting the French school has two distinct peaks of activ- pioneering work of Brongniart, Cordier and ity, the earlier due to Brongniart and Cordier, Pinkerton in the s, the other the work of while the later peak is due mainly to Lacroix.
A slightly different picture is presented by the Whether we should be congratulated or not, distribution of the number of references con- only time will tell! A general term for granitic SiO2. See also intermediate, basic and rocks typically occurring in rift zones and in ultrabasic. A term for a series of andesites, biotite, and sometimes alkali amphibole. The dacites and sodic rhyolites of unusual chemi- prefix A stands for anorogenic.
Cotelo Neiva, a, anomalies; the more mafic rocks of the series p. A collective term, related to phenocrysts of plagioclase, amphibole, mica, banakite and shoshonite, for a trachyandesitic very rare orthopyroxene, but no rock, containing phenocrysts of olivine and clinopyroxene; titanomagnetite, apatite, zir- augite in a groundmass of augite, calcic con and titanite are common. A term defined as a variety Johannsen, b, p.
A term originally used for ring on the ocean floor; synonymous with orthoclase-bearing tonalite of the Adamello mid-ocean ridge basalt. An obsolete name used as a plagioclase, which do not occur in the magma type for a biotite-bearing eucrite or Adamello. The term should be avoided be- variety of gabbro. A term for pyroclastic fragments , p. A mnemonic name suggested for a Croasdale, , p. A commonly used chemical term now Vlodavets, , p.
A general term for rock consisting essentially of aegirine and nepheline syenites characterized by the mo- nepheline. Agpaite is now nepheline and albite. An than simple minerals such as zircon and obsolete name for a variety of alkali ilmenite. Agpaitic has commonly, but incor- clinopyroxenite containing aegirine-augite, rectly, been used as a synonym for peralkaline.
The original spelling Cf. A mnemonic name suggested for Tomkeieff p. A term from an obsolete chemi- lamprophyre consisting of various cal classification, based on feldspar composi- phenocrysts including olivine, diopsidic tion rather than SiO2 alone, for basaltic rocks pyroxene, amphiboles and phlogopite in a in which CaO: A vari- rador, Canada; Tomkeieff p. A local name for a variety of olivine, mica, perovskite, titanomagnetite microgranite or quartz microsyenite consist- and melilite.
May be used as an optional term ing of orthoclase, quartz and riebeckite. A local name for a variety of eration; Tomkeieff p. Now defined in the biotite in a cryptocrystalline groundmass of pyroclastic classification section 2. Duparc, , and Fig. A variety of agglomerate in quartz, chloritized biotite and garnet. Kato, which the ejecta were plastic when emplaced , p. A collective term for varieties of p.
An obsolete term for a porphyritic ing of alkali feldspar, with more or less rock containing albite phenocrysts in a feld- oligoclase, biotite, pyroxene and often quartz. A variety of keratophyre. They are characterized by rectangular Coquand, , p. An obsolete local name for a Johannsen v. Erroneously spelt rocks which contain alkali feldspar but no alentecite by Tomkeieff.
Marcet Riba, , labradorite. Senft, , Table II; Tomkeieff p. A leucocratic variety of alkali porphyritic basaltic andesite with a fine- feldspar granite consisting almost entirely of grained groundmass whose feldspars are in- quartz and alkali feldspar. May be used as a termediate in composition between those synonym for leucocratic alkali feldspar gran- found in basalt and andesite.
Spurr, a, ite of QAPF field 2 p. An obsolete local name for a variety composed essentially of leucite and of dunite composed of olivine, pyrrhotite and clinopyroxene in about equal proportions with smaller amounts of magnetite and pentlandite. Minor amounts of Walker, , p. The name was previously used for a Johannsen v. A name proposed for a variety of ington, , p. An obsolete name proposed for a Tomkeieff p.
A prefix given to a rock which Belyankin, , p. A variety of alkali feldspar syenite foids or acmite. Original reference uncertain; 6 Fig. A term originally used field 10', with alkaline character due to the for basalts containing accessory foids.
Such presence of analcime or nepheline and such rocks generally contain a titanian augite and dark constituents as barkevikite see p. Niggli, , Now defined chemically as a variety of basalt p. A term used, but not tive nepheline. Hibsch, recommended, as a synonym for peralkaline , p. Bohemia, Czech Re- amphibole or pyroxene.
A variety of diorite with alka- Tomkeieff p. A term used, but not dark constituents as barkevikite see p. A amphibole or pyroxene. It should not be used member of the charnockitic rock series equiva- as a synonym for alkali feldspar rhyolite. A term used, but not , p. A term suggested as syenite, i. It should not be used Streckeisen, , p. A spe- Rosenbusch, , p. A term used, but not feldspar. A spe- amphibole or pyroxene. It should not be used cial term for a variety of rhyolite in which as a synonym for alkali feldspar trachyte.
An obsolete term for igneous feldspar. Now defined modally in QAPF field rocks poor in alkalis. Many original textures less mica. An obsolete name temporarily classification for the medium- to fine-grained proposed for a group of basaltic rocks which variety of calcite carbonatite consisting prin- could not be classified as melaphyres or trapps cipally of calcite section 2. Winkler, , Eckermann, , p. A variety of troctolite composed of andesites and dacites containing cordierite of olivine and highly calcic plagioclase.
The rock consists essentially of andesine- of augite, biotite, hornblende, nepheline and microcline antiperthite with minor quartz and orthoclase. An obsolete term for a tuff consisting not contain the name although it does de- of fragments of feldspathic glass and some scribe the type rock; Amherst County, Vir- crystals. An ultramafic rock with phenocrysts classification, based on feldspar composition of phlogopite-biotite, olivine and augite in a rather than SiO2 alone, for a class of rocks in groundmass of melilite often altered to cal- which CaO: A local name for a porphyritic granites falling into QAPF field 3a.
An erroneous spelling of p. A term used for an alkaline coarse-grained igneous rock consisting al- mafic volcanic rock consisting of olivine, most entirely of amphibole. Johannsen, , titanian augite and analcime with minor p. A revised spelling recommended term basalt is now restricted to a rock con- to replace the field term amphiboleid. Now taining essential plagioclase.
As the rock is a obsolete. A term originally used for any Lindgren, , p. Now defined in of hornblende and plagioclase. A general term used in France Hibsch, , p. Now defined in eff p. An obsolete term originally used foid diorite in which analcime is the most for leucite-tephrites but later used for intru- abundant foid. Now defined in dal leucite. An old term for a coarse-grained may be used as an alternative. Now de- containing amygdales. An obsolete term for a analcime is the most abundant foid.
Now de- Jenzsch, , p. A local name for a variety of analcime is the most abundant foid. Now defined in minor olivine and hornblende. Bohemia, Czech Republic; with an aphanitic groundmass. Also called Johannsen v. An obsolete term suggested for defined as a variety of foidite in QAPF field an extrusive rock intermediate between 15c Fig. A local name suggested for Tomkeieff is erroneous; Cyclope Island, diorites that are younger than the usual ones.
An obsolete term proposed for granitic rocks that are younger than the usual a monomineralic volcanic rock consisting of ones. A local name suggested for Johannsen, , p. As analcime is the mineral spell- Wolff, , p. An obsolete name suggested for used in preference to analcitite. Pirsson, a group of amphibole tonalites. Marcet Riba, , p. A term used in the USSR as a gested for a rock consisting of analcime, synonym for basaltic andesite.
Original ref- amphibole, aegirine and sodalite. Belyankin, erence uncertain , p. An obsolete field term for dark for rocks transitional between andesite and coloured, non-porphyritic aphanitic igneous labradorite an old French group name which rock. A term for a dark-coloured sory magnetite, apatite, aenigmatite, olivine-bearing andesite.
Iddings, , hastingsite and cancrinite. A term proposed for a coarse- basanite with abundant phenocrysts of grained rock consisting essentially of pyroxene and olivine. An intermediate volcanic rock, eff p. An obsolete term originally nephelinite containing biotite. Lacroix, used as a synonym for basanite and later for b, p.
Olivine and nepheline may also be p. Originally used as a variety of In the original description the composition of andesite containing considerable amounts of the plagioclase was probably incorrectly de- sanidine in the groundmass. According to Tomkeieff et al. Sigmund, this rock is a diabase containing calcic , p. A local name for Siberian basalts pear in the reference cited. The same incor- and dolerites. A variety of alkali feldspar Mt, Kolyma region, Siberia, Russian Federa- syenite composed almost entirely of tion; Tomkeieff p.
A local name for a lamprophyric p. An erroneous term stated to be interstitial quartz. A variety of peralkaline phonolite Tomkeieff et al. An obsolete name for a pyroxene and aenigmatite. Osann, , porphyritic anorthoclase syenite. A mnemonic name from apatite and consisting essentially of plagioclase often nepheline, used for alkaline intrusive rocks with small amounts of pyroxene. A rock of magmatic origin com- ety of syenite with phenocrysts of posed essentially of apatite. Loewinson-Lessing, a, Lessing, , p.
An obsolete name for a variety of p. An obsolete field term for non- to have crystallized at a high level. A revised spelling recommended to mations. A sodic syenite lete. Barth, , Tomkeieff p. A term originally used for a ophite and variolite, of dioritic composition. A term used both for fine-grained vogesite and spessartite. A local name for a variety of basalt rock. A prefix used for light-coloured rocks ; Johannsen v. A comprehensive term for rocks ferromagnesian minerals, e. It is suggested Streckeisen, , p. Bugge, abandoned the term aplogranite in favour of , p.
A local name for a variety of Tomkeieff p. An obsolete term for a nepheline- and olivine. A prefix used to denote that one rock has a, p. This can include Johannsen v. An obsolete name for hornblende ite located in the apices of intrusions and biotite granodiorites and granites in the Dent frequently mineralized in Sn, W, Be, Nb—Ta, Blanche nappe of the Swiss and Italian Alps. A term used for a coarse- Tomkeieff p. A local name for a leucocratic variety feldspar and olivine, with minor pyroxene, of nepheline fergusite consisting of leucite or biotite and chlorite. A local, general term for medium- to amphibole and minor alkali feldspar.
Wash- coarse-grained, meso- to melanocratic rocks ington, , p. A local name for a variety of trachyte large crystals of titanite. A green ultrabasic rock composed rock had previously been called ciminite by mainly of chromo-jadeite and picotite. A local name for a variety of for a glassy orthophyre containing sillimanite kersantite a lamprophyre with abundant and cordierite, but later shown to be contact biotite in a matrix of plagioclase and quartz.
An obsolete term for a melanocratic Tomkeieff p. Now defined in the named after islands of the Atlantic Ocean; pyroclastic classification section 2. Now defined in the pyroclastic andesites composed essentially of augite and classification section 2. A volcanic rock composed essen- coarse ash tuff, fine ash tuff and dust tuff. A term used for a lithified volcanic may be analcime.
Aso lava is the same as ash-stone in p. An obsolete name for an augite Japan; Tomkeieff p. An obsolete field term for a variety Johannsen v. A local name for a variety of , p. An alternative name for sperone. A local name for a variety of Avezac-Prat, S. Wash- areas of Hungary and Yugoslavia. Cotta, ington, a, p. A variety of analcimite composed composed of serpentine, magnesite and opal. A melanocratic variety of trachyte with marked spheroidal structure analcime nepheline monzosyenite consisting composed essentially of perthite with minor of kaersutite, titanian augite, alkali feldspar, amounts of biotite and aegirine-augite.
A term suggested for an extrusive Karakorum, Kashmir, India rock intermediate between basalt and latite. A collective term, related to Johannsen, c, p. A volcanic rock consisting essen- trachyandesitic rock containing phenocrysts tially of calcic plagioclase and pyroxene. It is similar to absarokite but con- p. An obsolete term originally used eff p. An obsolete name for a several other senses ranging from specific trachyte containing augite and hornblende.
An obsolete term for an al- and leucite. A term for a vol- as the name for a black Egyptian basalt, but canic rock which has plagioclase of variable later as a collective term for black basic composition with the ferromagnesian miner- volcanic rocks. Now proposed for prelimi- als more commonly found in basalts, e.
Now defined chemically in TAS field Fig. A grained basalt, e. Pinkerton, member of the komatiite series with MgO in a, p. A term originally used for a spinifex texture and evidence of rapid quench- porphyritic basalt containing pyroxene ing of high-temperature magma. Chemically phenocrysts, but later used as a group name they are intermediate between tholeiitic ba- for rocks composed of clinopyroxene, salt and boninite and are thought to have been plagioclase, essential foids and olivine. A group Theophrastus, BC — see Johannsen for term introduced for rocks intermediate be- further discussion; from the Greek basanos tween trachyandesite and trachybasalt, i.
Le Bas et for alkaline volcanic rocks consisting of foids al. It is distin- variety of basalt. A melanocratic variety of theralite rocks with the composition of basanite but consisting of abundant brown amphibole and without modal nepheline. A commonly used chemical term now Rosenbusch, , p. A local name for a variety of acid. An obsolete group name for all basic with nepheline, alkali feldspar, oligoclase igneous rocks.
An obsolete term for a b, p. An obsolete term for a plutonic rock essentially composed of clinopyroxene with whose feldspars are intermediate in composi- small amounts of olivine and leucite. It is suggested Streckeisen, , mugearite and trachyte, with a differentiation p. It consists essen- Oyawoye, , p. An obsolete term for a variety of fined chemically as the sodic variety of rhyolite. A clayey material, composed aegirine-augite and biotite with perovskite largely of smectite and montmorillonite, and opaques. A medium- to fine-grained va- p.
See bjerezite, which is an earlier dolomite. An obsolete local name for a variety p. A variety of alkali feldspar syenite well as melilite. The term is essentially microcline and albite with traces of foids and synonymous with polzenite. An old Ger- serpentinite. Boetius de Boot, , after T. Bergman, ; Tomkeieff p. Starzynski, , and biotite. A mnemonic name suggested for a p. A local name for a lamprophyric Belyankin, , p. A mnemonic name suggested for augite in a groundmass of analcime prob- a rock consisting of biotite, nepheline and ably after nepheline.
Possibly equivalent in melilite. A rock consisting almost entirely of p. A melanocratic variety of theralite Johannsen v. An unwieldy name con- rimmed with alkali feldspar and small amounts structed by Johannsen to illustrate some of of nepheline. A local name for a variety of and topatourbiolilepiquorthite. Johannsen, porphyritic rhyolite that contains phenocrysts , p. A member of the Mt Beschtau, Pyatigorsk, N. It is suggested variolite. An obsolete local name for a variety angular to subangular shape indicates that it of clinopyroxenite composed essentially of was solid during its formation Cf.
A local name applied to an ultramafic alkali feldspar than nosean, biotite and augite. According to Tomkeieff a local French district, near Koblenz, Germany name for diabase or diorite. An obsolete local name for a , p. A term for a porphyritic posed of enstatite and hornblende. Cotelo micromonzonite or monzogabbro rich in Neiva, b, p.
A term synonymous with teschenite Later transliterated as bereshite. Erdmanns- or analcime gabbro. An alternative spelling of consisting of labradorite, brown hornblende, birkremite. Original reference uncertain minor augite and a little biotite, i. A local name for a variety of of gabbro. The term was later adopted by , p. An obsolete term for a variety of Weinschenk, , p. Black, ; Tomkeieff p. A leucocratic variety of v. A term from an obsolete chemical groundmass of analcime and aegirine-augite classification, based on feldspar composition with minor nepheline, sanidine and melanite rather than SiO2 alone, for a class of rocks in garnet.
Now defined in the pyroclastic clas- tirely of alkali feldspar and characterized by sification section 2. A local Irish name for a tachylyte. A variety of peralkaline syenite andesitic rock consisting of phenocrysts of pegmatite composed of idiomorphic feldspars protoenstatite which inverts to clinoenstatite , with interstitial arfvedsonite and aegirine- orthopyroxene, clinopyroxene and olivine in augite.
A name given to a hypothetical set of hyaloandesite. Now defined chemically in data used to illustrate the problems of the the TAS classification Fig. A dyke rock consisting essentially small amounts of plagioclase. Minor olivine of K-feldspar with minor fluorite. Lacroix, Eckermann, , p. An obsolete term for an altered Johannsen v. A local name for a variety of Pinkerton, b, p. A local name for a coarse-grained a, p. A local name for a peralkaline products , melanite and biotite, and some- granite containing biotite and small amounts times characterized by the presence of of arfvedsonite.
A term originally used for piperno- p.
An obsolete term for a hornblende- Val Nera, Chiampo Valley, near Arzignano, bearing rock with carbonate amygdales asso- Italy; Tomkeieff p. A variety of orthopyroxenite com- Borzoli, Genoa, Italy; Tomkeieff p. A variety of fine-grained leucocratic Williams, , p. An obsolete name for lherzolite. The prefix C stands for charnockitic.
A mnenonic name from calcite, eff p. A basalt not defined by ized by the absence of orthoclase and a com- its mineralogy but by its association with plete transition in mineral composition from rocks of the basalt—andesite—dacite suite of the basic to acid end members. It is suggested the orogenic belts and island arcs. Original Streckeisen, , p. An obsolete term for a tonalite p. A local name for a potassic vol- , p. A term for varieties of anorthosite composed of almost equal amounts of alkali containing calcic plagioclase. Johannsen, feldspar and various zeolites with minor , p.
A chemically de- a metasomatized andesitic rock. An erroneous spelling of busorite. A variety of anorthosite com- carbonatite in which the main carbonate is posed mainly of highly calcic plagioclase. A general term for granitic member of the ijolite—melteigite series. A term proposed for a calcareous essentially albite or sodic plagioclase, with carbonatite or calcite carbonatite.
An obsolete term for a Monmouth Township, Ontario, Canada; gabbroic rock impregnated with calcite. An obsolete local name for a containing normative olivine but no norma- variety of analcime basanite consisting of tive leucite. Mineralogically is an enstatite- olivine, titanian augite, labradorite and sanidine-phlogopite lamproite Table 2. A variety of leucite tephrite with peralkaline quartz syenite consisting essen- large leucite crystals associated with essen- tially of sanidine and lesser amounts of tial plagioclase and clinopyroxene with mi- aegirine-augite and quartz.
Now defined in Tomkeieff p. A variety of lamprophyre foid diorite in which cancrinite is the most composed of phenocrysts of combinations of abundant foid. Rosenbusch, variety of foid monzodiorite in which , p. Bautzen, cancrinite is the most abundant foid.
Loewinson-Lessing, a, cancrinite is the most abundant foid. A local name for a onymous with cancrinite monzosyenite. An obsolete local name proposed abundant foid. An obsolete term used in several orthoclase and lesser oligoclase with horn- ways. It was originally defined as an ex- blende. A collective term for an plagioclase, melilite and nepheline.
Cordier, igneous rocks in which the modal amount of , p. A melanocratic diopside-leucite Tomkeieff p. An obsolete term proposed for posed of leucite and diopside with minor igneous rocks intruding Carboniferous form- olivine pseudomorphs, amphibole, phlogopite ations. A spelling of keramikite attrib- sen v. An obsolete term for devitrified reference cited.
A member of the p. A local Brazilian name for a Table 2. The term is synonymous quartz-tourmaline rock. Eschwege, , with opdalite. A term now applied to Johannsen v. A local name for a sodic Table 2. The term was originally melanocratic lamprophyre having defined as a specific type of orthopyroxene phenocrysts of biotite, olivine and augite in a granite found associated with other members matrix essentially of alkali feldspar with of what was called the charnockitic rock patches of what could have been leucite.
A basic plu- Johannsen v. An obsolete term originally clinopyroxene. Now defined modally in the applied to green porphyries from Egypt. A term from an obsolete chemi- tonic rock consisting almost entirely of cal classification, based on feldspar composi- clinopyroxene. Now defined modally in the tion rather than SiO2 alone, for granitic rocks ultramafic rock classification Fig.
Now defined in ing was changed to kristianite and the term the pyroclastic classification Table 2. Now defined in the eff p. An ultramafic rock consisting variety of tuff in which the mean diameter is essentially of chromite. An obsolete name applied to granu- by phenocrysts of sanidine, augite, labradorite lar pyroxene rocks from Sweden.
Cordier, and olivine in a trachytic groundmass of , vol. A melanocratic leucite-rich arsoite by Reinisch. Washington, b, lamprophyre largely composed of p. A basic volcanic ash consisting of tjosite but with leucite instead of nepheline. Later extended Lacroix, , p.
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A variety of quartz latite that p. A melanocratic variety of quartz Niggli. A kamafugitic analcime, clinopyroxene and amphibole. Originally described as a vari- Johannsen v. An obsolete local name for the containing phenocrysts of quartz, alkali feld- hypabyssal equivalent of andengranite gra- spar, aegirine, arfvedsonite or riebeckite and nitic rocks that are younger than the usual minor biotite. A term for any igneous rock con- Johannsen v. Now defined Tomkeieff p. An old term for corsite.
An orbicular variety of gabbro com- with comendite. An erroneous spelling of miagite and napoleonite. An obsolete name for a variety of Johannsen v. Cotelo hornblendite composed of large crystals of Neiva, b, p. An obsolete term for a variety melanite, biotite, iron ore and apatite. Shand, of brownish borzolite hornblende-bearing , p. A local name for a melanocratic silica phase is present in a glassy groundmass. A name given to a hypothetical set of predominate. A variety of dunite composed statistical interpretation of rock compositions. A coarse-grained leucocratic Wadsworth, , p.
An obsolete local name for a dyke Barlow, , p. A general term proposed for igne- mediate to acid. They are characterized by ous rocks in which most of the crystals are acicular and skeletal crystals of plagioclase, thought to have accumulated by gravitational augite and hornblende in a felsic groundmass. A variety of olivine analcime porphyritic rock in which the clusters of dolerite or gabbro composed of olivine, phenocrysts resemble cumulus clouds.
A local name for an more olivine than teschenite the two names altered lamprophyric rock containing have been used interchangeably. Flett, , phenocrysts of plagioclase and uralitized p. An obsolete name for a porphyritic Rosenbusch, , p. An obsolete term for an andesitic rock containing olivine and quartz. An obsolete term for a granular Dannenberg, , p. Originally used as a collective blende with cores of pyroxene. Now proposed for preliminary p.
A leucocratic Tomkeieff p. An obsolete local term for a fine- and aegirine. A name proposed for a rock inter- quartz. Minor riebeckite is present. Pelikan, mediate between dacite and rhyolite. A rock which is chemically a phenocrysts of biotite and titanian augite in a dellenite but contains no visible orthoclase. A temporary name suggested by A. A term for medium-grained rocks have been damtjernite but damkjernite is in of basaltic composition that has been used in common usage. A plutonic rock consisting of inter- can usage implied an ophitic texture.
The mediate plagioclase, commonly with horn- original definition included a transitional tex- blende and often with biotite or augite. Now regarded as being syn- p. A term proposed, but never used, Tomkeieff p. Originally used as a group name Johannsen v. Although originally suggested for plagioclase, amphibole and biotite. An obsolete term for a intrusion which has a different composition porphyritic diorite aplite. Polenov, , from the main intrusion. An obsolete mnemonic name for a Tomkeieff p.
A term used for a rock , p. A term applied to igneous rocks complete melting of pre-existing rocks. A mnemonic name suggested for a Lacroix, , p. A comprehensive term for almost entirely of diopside or chrome- various plutonic rocks of essexitic and diopside. The term includes Johannsen v.
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An obsolete field term for a coarse- with large amounts of barkevikite see p. A biotite-bearing variety of nepheline replace the field term dioreid. A local name for a mined megascopically. An obsolete name for a gabbroic rock Tomkeieff p. A rock intermediate in grain size drusy structure. A local German name for a non- opaque minerals; often with ophitic texture. Although attributed to If olivine is present the rock may be called Wolff, , p. A local name for a variety of diabase and an approved synonym for trachyandesite characterized by intersertal microgabbro of QAPF field 10 Fig.
Caucasus, Russian ; Johannsen v. An oceanic volcanic rock of the Tomkeieff p. A variety of plagioclase is andesine, Cf. A local name for a variety of trachyte nepheline-bearing diorite containing corun- that contains a few phenocrysts of oligoclase dum and scapolite. An ultramafic plutonic rock con- Johannsen v. A local name for a variety of modally in the ultramafic rock classification trachyandesite characterized by micro- Fig. An alternative term for elvan. Cotta, megacrysts of orthoclase in a groundmass of , p. Now defined in the is equivalent to orthopyroxene tonalite of pyroclastic classification section 2.
Tilley, as a variety of ash grain in which the mean , p. Synonymous with Antarctica; Johannsen v. A term for granites with low classification section 2. Synonymous with fine ash p. A variety of hybrid biotite , p. A lamprophyric rock of basanitic sisting of alkali feldspar and abundant titanite. A variety of orthopyroxenite com- Tomkeieff p.
An obsolete name suggested for , p. An obsolete term for a variety of p. A local name for a peralkaline granite enstatite. A variety of alkali feldspar syenite p. An obsolete term suggested for non- , p. A local term for dyke rocks of granitic Tomkeieff p. It is a isolated crystals and in radiating groups. A local name for a variety of this term should be abandoned. An obsolete name for epidiorite. A variety of nepheline p. Current usage as a field nepheline. May be used as a synonym for term implies rocks of basaltic composition nepheline monzogabbro or nepheline recrystallized by regional metamorphism.
A term coined by uranium explo- v. A term suggested for a dark of syenite composition, displaying rounded plagioclase-rich akerite. An obsolete name for a vol- common usage epidiorite , the prefix epi- is canic rock consisting of serpentinized olivine used here as a qualifier to the name of the rock phenocrysts in a groundmass of olivine, resulting from the alteration of granite. An obsolete local name for a variety named it westerwaldite. Lehmann, , of granophyre composed of clusters of quartz p. An obsolete name for a , p. An obsolete term for a vari- and biotite.
An obsolete term for a vari- variety of quartzolite consisting predomi- ety of nepheline monzosyenite, synonymous nantly of quartz with some muscovite. It is with husebyite. An obsolete term for a vari- action. A variety of essexite Erdmann, , p. A variety of leucite nephelinite es- granitic composition. A local term used for trachyandesites Tomkeieff p.
A term originally Tomkeieff p. A local name for a lamprophyric of anorthite and augite Rose, , it was dyke rock with rare phenocrysts of olivine, extended to include varieties of gabbro in corroded hornblende and occasional augite which the plagioclase was bytownite. The in a groundmass of augite, titanomagnetite, term should no longer be used as a rock name. According to Tomkeieff an igne- consisting essentially of eudialyte with mi- ous rock formed by the crystallization of nor variable amounts of microcline, residual liquids. However, the reference cited arfvedsonite and aegirine.
Eliseev, , Bowen, does not contain the name. An obsolete term for a variety of melanocratic volcanic rock largely composed quartz porphyry with a whitish earthy tuff- of melilite, leucite and olivine, when he was like appearance which cleaves into imperfect unaware that the rock had already been called tablets. A local name for a variety of eff p.
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An obsolete name proposed which was originally identified as enstatite. A local comprehensive term for , p. Loewinson-Lessing, , , p. A local name for a melanocratic rock. An obsolete collective name for augite, barkevikite see p. A member of the charnockitic Johannsen, , p. An obsolete term originally frequently used as a comprehensive name for used for a feldspathic variety of tawite a granitic rocks of the Farsund area.
It is sug- sodalite aegirine rock. An obsolete field term for an aphanitic, ity. An obsolete field term for a peralkaline granite, similar to rockallite, con- porphyritic light-coloured igneous rock with taining large amounts of aegirine and an aphanitic groundmass. Also called riebeckite and characterized by the presence leucophyreid. A variety of melteigite consisting of rectly being used for that purpose. A revised spelling recommended to Lacroix, b, p. The other group is named salic. As a rock term initially used v.
A metasomatic rock, normally associ- porphyries but now more commonly used for ated with carbonatites or ijolites and occa- microcrystalline rocks of granitic composi- sionally with nepheline syenites and tion. An obsolete name for a variety of Tomkeieff p. An obsolete name for a clinopyroxene with minor olivine, plagioclase porphyry in which the texture of the and magnetite.
Later used for effu- p. An obsolete local name for a dolerite. A term now used phyry in which the texture of the groundmass in two senses: Vogelsang, carbonatite in which the main carbonate is , p. An obsolete term proposed for a ety of carbonatite in which weight percent granite rich in feldspar. An obsolete term for a felsite. Le Bas, , p. Enjeux, problematiques et solutions.
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