 | | Journal (article/letter/editorial) | | JOURNAL, VOL. 22, 43-52 (1987) The age of the Lugar sill and a discussion of the Late-Carboniferous/Early-...arly- Permian siII complex of S.W. Scotland C.M.B. Henderson Department of Geology, The University, Manchester...separate from the main theralite-picrite unit of the Lugar sill. Ar-release spectra show discordance mainly due...emplacement age of 288 5 6 Ma (20) to be assigned to the sill. The results are used to discuss the age relations...the alkaline Permo-Carboniferous sill complex of southwest Scotland. It is concluded that these sills |  | | Journal (article/letter/editorial) | | a'H~. [vol. h x i i , ,7. The PICRITE-TEscIIENITE SILL ode LIIt~AR (AYRSIIIRE), By (~EOROE WALTER TYRRELL...Chemical Variations. (3) Average Magma of the Lugar Sill. (4) Composition, Identity, and Banding o f the...Comparison of the Lugar Sill w i t h the other Picrite-TesChenite Sills of Scotland. . . . . . . . . ...established for several occun-ences in the lowlands of Scotland. The Barnton occurrence, near Edinburgh , has...:D. Falconer has described a pierite-tesehenite sill at Ardrossan, intrusive into t h e Carboniferous |  | | Journal (article/letter/editorial) | | 120 G. W. Tyrrell—Alkaline Igneous Rocks, Went Scotland. Campignien or Early Neolithic Beach. This proved...PALEOZOIC ALKALINE IGNEOUS ROCKS OF THE WEST OF SCOTLAND. By G. W. TYEEFXL, A.B.C.SC, F.G.S., Assistant...agglomerate of the Carskeoch vent, near Patna, Ayrshire. Macroscopically it is light grey, compact, and...particles of which suggest the former presence of nepheline. A few broad plates of pale augite and crystals... G. W. Tyrrell—Alkaline Igneous Rocks, West Scotland. 121 and resembles neither the essexites of |  | | Journal (article/letter/editorial) | | POST-CARBONIFEROUS INTRUSIVE IGNEOUS ROCKS OF THE WEST OF SCOTLAND. By G. W. TYRRELL, A . R . C . S C , Assistant...INTRODUCTION. NO one studying the geological maps of Scotland, on whatever scale, can fail to be impressed by...Ordovician, Devonian, Carboniferous, and Permian in Scotland each exhibit a great series of extrusive and intrusive...Western Isles. This richness in material makes Scotland a petrographer's paradise. The amount of work...Skye." The district about Glasgow and the West of Scotland generally is exceptionally favourable to the study |  | | Journal (article/letter/editorial) | | crystallization of the teschenite from the Lugar Sill, Ayrshire W. J. PHILLIPS SUMMARY. Twelve stages in...biotite flakes, developed in liquid pockets after the sill had begun to consolidate, due to the coalescence...expansion and fracturing of the partially consolidated sill. It is argued that the separation of the gas phase...forms part of the composite sill in the coal measures at Lugar in Ayrshire has become well known as the...11 m (35 feet) and the lower 8 m (28 feet) of the sill. The petrography of the teschenite is described |  | | Journal (article/letter/editorial) | | SHORT COMMUNICATIONS Kaersutite from the Lugar sill, Ayrshire, and from aln6ite breccia, Aln5 Island,...occurring as veins in the picrite of the Lugar sill, Ayrshire, Scotland, which has been termed lugarite by...titanaugitc and labradorite in a groundmass of nepheline and analeime. This amphibole was analysed by Scott...a kaersutitic composition. It differs from the Lugar mineral in having a much higher Mg: (Fe2+§247 ratio...has a somewhat lower Fe2+:Fe a+ ratio than the Lugar kaersutite but for both minerals the 1%2+:Fe s+ |  | | Journal (article/letter/editorial) | | similarity of this analysis to those of picrite, nepheline-basalt, and Hillhouse basalt, from the Lower Carboniferous...Carboniferous of the Midland Valley of Scotland, and also to the type bekinkinites of Madagascar. The...and some Ayrshire theralites; the latter includes peridotites, kylites, and certain nepheline- and analcite-basalts...illustrated in Table I by analyses of the Barshaw and Lugar rocks, both of which are here published for the...discussion will appear in a detailed paper on the Lugar sill. It will be seen that the analyses are unique |  | | Journal (article/letter/editorial) | | G. W. Tyrrell—Alkaline Igneous Rocks, West Scotland. 69 J, J. The line of junction between tachylite...PALEOZOIC ALKALINE IGNEOUS ROCKS OF THE W E S I OF SCOTLAND. By G. W. TYRRELL, A.E.C.SC, F.G.S., Assistant...in Central Scotland have a distinct alkaline facies. Such rocks as monchiquite, nepheline-basalt, mugearite...the Lothians; whilst in the western counties nepheline-phonolite, theralite, mugearite, and teschenite... 70 G. W. Tyrrell—Alkaline Igneous Rocks, West Scotland. affinities of the intrusion of Necropolis Hill |  | | Journal (article/letter/editorial) | | of the -"- teschenites of the Midland Valley of Scotland, and are an attempt to produce a working classification...presence of nepheline and the origin of the analcite in teschenites had arisen, nepheline-bearing teschenites...analcite in teschenites was secondary, replacing nepheline— a view which he maintained throughout his later...and the Caucasus, but was unable to find any nepheline, even by microchemical tests. He considered that...teschenitic intrusions in the Midland Valley of Scotland, and since his description of the Carcraig rock |  | | Journal (article/letter/editorial) | | Manchester MI3 9PL, UK 2 Department of Geology, The University, Sheffield $1 3JD, UK Abstract. Mineral...increases. The most SiO2-rich nephelines plot in the nepheline plus feldspar stability field and must have crystallized...to rocks which crystallized primary SiO2-rich nepheline and formed from this phase by subsolidus recrystallization...textures in the Dippin sill crinanites showing alteration of a SiO2-rich nepheline to clear analcime and...and concluded that the nepheline was a primary phase which altered to analcime during subsolidus interaction |  | | Journal (article/letter/editorial) | | Glacial deposits were removed we should see the south-east solid angle standing higher than the three others...to the North Tyne and to the Eden from the north-east. As a result of this watershed and the westerly...recognition 2of teschenites in the Midland Valley of Scotland, J_ first by Teall and later by several other...Tyrrell—Bekinkinite of Barshaw, Renfrewshire. 305 Scotland. A preliminary description of this rock as a weathered...in a plantation a little to the east of Barshaw House, H miles east of Paisley, along the Glasgow road |  | | Journal (article/letter/editorial) | | THE DISTRICT. rock s occur near Galston, North Ayrshire, where they are associated with intrusions of...rocks covering most of Renfrewshire and North Ayrshire has not yet recei ved a distinctive name. For...the occurrence of mugearites and analcite basalts (East Lothian), and by their assoc iation with trachytes...Bin vent ( Glasg. Mem., pp. 1°9, !43-S). A fine nepheline-phonolite has been obtained near Fintry (ibid...(ibid., pp. IIO, 144)' A little farth er east Mr. J. V. Harrison has obtained a series of tra chyt es ·in |  | | Journal (article/letter/editorial) | | Derwentwater: pyro- N o r w a y (Norge) Laagendal: nepheline, 114 Sorfinnset, Glomfjord: chondrodite, humite... Ilmen mountains: chevkinite, 42 Wolf Rock: nepheline, 114 868 Goldscope, Vale of Newlands: pyromorphite...apatite, ilmenite, pyrrhotine, stilpnomelane, 1032 SCOTLAND Reyerite, 821 Traprain Law, Haddingtonshire:...mullite, sillimanite, xci Ayrshire Byne Hill, Girvan: hydrogrossular, 814 Lugar sill: kaersutite, 718 Fife...404 East Africa Mrima Hill, Kenya: goreeixite, 281 SOMALIA Darkainle, Borama district: nepheline syenite |  | | Journal (article/letter/editorial) | | around borders of spheroidal masses composed of nepheline, analtime and leucite (Holmes 1928). From the...Natro!ite~_Biotite [ L.,: "~'~4~WF_J~:~.'.~JK--Nepheline ~ " ~ Analcim • ~ii,~'m " / ~ 1ram ~, x...centre. c. Ocelii structure in teachenite, Lugar sill, Scotland. Well developed crystal face~ of the analcime...margin of an ocelli structure in teschenite, Lulcar sill. The deformation was probably c~msed by retrograde...illustrated by Philpotts (|972h from the Ste. Dorothie sill near Montreal. This structure consolidated as the |  | | Report (chapter) | | 2015 Carboniferous and Permian magmatism in Scotland B. G. J. U P T O N 1, D. S T E P H E N S O N 2...of Edinburgh, West Mains Road, Edinburgh EH9 3JW, UK (e-mail." bupton@glg.ed.ac.uk) 2British Geological...EH9 3LA UK 3British Geological Survey, Maclean Building, Wallingford, Oxfordshire OXIO 8BB, UK Abstract:...Isles, with accompanying basaltic magmatism. In Scotland Dinantian magmatism was dominantly mildly alkalinetransitional...Silesian. As sedimentary basin fills increased, sill intrusion tended to dominate over lava extrusion |  | | Journal (article/letter/editorial) | | Central Newfoundland, M. Kay & N. hldredge, 372. of East-Central Alaska [ R ] , 406. Campbell, 1. H.. Origin...Crystallization of the teschenite from the Lugar Sill, Ayrshire, W. J. Phillips, 23. Cutbill. J. L., et...Kentucky and Ohio [ R ] , 306. Cambrian Trilobites of East-Central Alaska [ R ] , 4 0 6 . Geology of epigenetic...A. J. Whiteman, 298; D. Parkinson, 299. Lugar Sill, Ayrshire, Teschenite from the, W. J. Phillips, 23...Dictionary of Geography [ R ] , 306. Morgan, W. R., Nepheline-basalt, olivinenephelinite, olivine-nemafite, |  | | Journal (article/letter/editorial) | | resembling mafic members of alkaline basalt suites from Scotland and Australia. Presence of distinctively diopsidic...807 County on the west to Travis County on the east, with the greatest variety and concentration in...Uvalde County (Fig. 1). Most of them are plugs of nepheline basalt and related ultra- 808 GREENWOOD AND...limestone. Locally intercalated in the Grayson formation east of Mustang Hill are submarine volcanic mudflows...Rock Analysis Laboratory) 2. Kylite of Benbeoch, Scotland (Johannsen, 1939, vol. IV, Table 83, No. 4) 3 |  | | Journal (article/letter/editorial) | | LABORATORY, NO. X X V . Barkevikite from I~tgar, Ayrshire. By ALSXA~)Ea Sco~% M.A., B.Sc. [Read :November...found amongst the Permo-Carboniferous rocks of Ayrshire, with comparatively large cl~stals of barkevikite...veins and dykes intrusive into the picrite of the Lugar sill and a s ' Schlieren' and irregular patches in...labradorite in a groundinass of analcite and nepheline, the two last-named minerals comprising about...dec. 5, vol. ix, pp. 77-80. BARKEVIKITE FRO~f LUGAR, AYRSHIR~E. ] 39 eight measurements was 55 ~ 36' |  | | Journal (article/letter/editorial) | | n Volcanieity in Scotland Review of Carboniferous-Permian Volcanicity in Scotland 1) By E. H. FRANCIS...Bedeutung. Abstract The main Carboniferous outcrop in Scotland is in the Midland Valley rift, though ro&s of...m.) and Burntisland Anticline (e. 400 m.) in the east, and the Kelso Traps of the Tweed Basin (e, 120...relatively short-lived ash-cones. They formed in Ayrshire (Ei age) but were most abundant in Fife, occurring...possibly into Westphalian "B'" in Fife, but in Ayrshire volcanicity was more intermittent and is represented |  | | Report (edition) | | BRITISH REGIONAL GEOLOGY THE MIDLAND VALLEY OF SCOTLAND EDINBURGH HER MAJESTY’S STATIONERY OFFICE price...BRITISH REGIONAL GEOLOGY The Midland Valley of Scotland SECOND EDITION, REVISED By M. MACGREGOR, M.A...Fig. 6. Map of Darvel-Galston-Sorn district, Ayrshire and Lanarkshire .. 27 Fig. 7. Section across...Knockgardner and Linfern Loch, near Straiton, Ayrshire . 32 Fig. 8. Diagram showing general succession...of Scotland 35 Sections across the Midlothian and Dalmellington Coalfields shire and Ayrshire. Fig |  | | Journal (article/letter/editorial) | | the investigation of a differentiated teschenite sill near Gunnedah, New South Wales, a study of the literature...recognition of teschenites in the Midland Valley of Scotland is due to Teall (1888, p. 191) in his description...veining picrites and crinanites in the Garbh Eilean sill, Shiant Isles (Walker, 1930, p. 368). Chemical differences...Palaeozoic teschenites of the Midland Valley of Scotland. (Tyrrell, 1923, p. 254.) Analysis VI: Average...both in intrusives, as in the Gunnedah teschenite sill, and in volcanic rocks (Larsen and Buie, 1938, p |  | | Journal (article/letter/editorial) | | several well-known examples, notably the Lugar sill in Ayrshire (Tyrell, 1917), but such small-scale layering...camptonites, hornblende gabbros, tinguaites, and nepheline syenites all showing mineralogical and chemical...TYRELL, G. W., 1917. The picrite-teschenite sill of Lugar, Ayrshire. Quart. J. geol. Soc. Land., 12, 84-131...VINCENT, E. A., 1953. Dykes from the Skaergaard area, East Greenland. Quart. J. geol. Soc. Lond., 109, 21-49 |  | | Report (chapter) | | Carboniferous-Permian volcanism in the Midland Valley, Scotland A. A. MONAGHAN1 & M. S. PRINGLE2 1 British Geological...Murchison House, West Mains Road, Edinburgh EH9 SLA, UK (e-mail: als@bgs.ac.uk) 2 Scottish Universities Environmental...Enterprise Technology Park, Rankine Avenue, East Kilbride G75 OQF, UK (e-mail: m.pringle@surrc.gla.ac.uk) Abstract:...Permian igneous rocks in the Midland Valley of Scotland yielded 17 concordant experiments with a relative...Permian igneous rocks of the Midland Valley of Scotland (MVS; Fig. 1) form a well-studied example of longlived |  | | Journal (article/letter/editorial) | | including tholeiite, alkali olivine basalt, and nepheline basalt were subtracted from the average composition...at intermediate depths, and that of group C (nepheline basalt) at greater depths. Even if the upper mantle...high-alumina basalt, alkali olivine basalt, and nepheline basalt magmas are generated by partial melting...1-69 0-27 003 0-54 4. Peridotite inclusion in nepheline basalt. Salt Lake. Honolulu, Hawaii. Analyst:...Hawaii (Kuno cl al., 1957). 8n. Average mclilite-nepheline basalt of Hawaii (Macdonald, 1949). 9a. Average |  | | Journal (article/letter/editorial) | | farsundite, 4, 387. MORGAN, W. R. On the usage of nepheline-basalt, olivine-nephelinite, olivine-nemafite...crystallization of the teschenite from the Lugar Sill, Ayrshire, 1, 23. REID, R. E. H. Hexactinellid faunas...CRIMES, T. P., & N. B. DHONAU. Pre-Cambrian of South-East Eire, 1, 77. DOWNIE, C , & W. E. TREMLETT. Micropalaeontological... evidence on the age of the Clara Group (South-East Ireland), 4, 401. FENNING, P. J., & E. C. FRESHNEY... MARSHALL, B. Joint and fault patterns in North-East Tasmania, 2, 186. MILLER, J. A., & P. E. BROWN. |
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