 | | Journal (article/letter/editorial) | | St. Austell, columbite, r3I Penryn Granite Co. quarry, Halv,zsso, stokesite, 411 Wheal Cock Zawn, stokesite...I Somerset Mendips, chloroxiphite, 357 Merehead quarry, Cranmore, brucite, blixite, hydromagnesite, hydrocerussite...Saltburn, iron-boracite, 404 Hepworth Iron Co. quarry, Penistone, francolite, siderite (magnesian), 287...Hill, Radnorshire, actinolite, tourmaline, altered gabbro, 124 Coch, Glamoroan, pyrobelonite, roman6chite...SCOTLAND Arisaig, Inverness-shire, tholeiite, 273 Bad na h'Achlaise, Assynt, Sutherland, fenite, microeline |  | | Journal (article/letter/editorial) | | Authors are printed in SMALLCAPITALS,Subjects in lower-case roman, and Localities in italics. T h e m i...Aerugite, synthesis, 72; Cornwall, anal., X-ray, 72; Saxony, anal., X-ray, 72. Aeschynite-priorite series,...topotactic formation from y-CaSiOa, 347. Ankerite, Germany, topotactic decomposition of, 634. Anthoinite,...Arsenobismite, Brazil, 785. Artern, Sachseu-Anhalt, Germany, mellite, 542. ASWATHA~ARAYA~A(U.), Isotopic ages...(S.), see SARBADHIKARI (T. n.), 770. Bhilwara district, ]~ajasthan, India, scorodite, 776. BmaAR (G. |  | | Book (edition) | | 134 143 THE TRACHYTE AND ANDESITE FAMILY THE GABBRO FAMILY . 152 156 170 . THE GREENSTONE FAMILY...The plutonic rocks-granite, syenite, diorite and gabbro - occur frequently in bosses . Laccolite.- A dome-shaped...many igneous areas (e.g. , in the English Lake District and in North Wales) . Dykes and Veins. - A dyke...sometimes form marked features in the scenery of a district ; for, being more capable of resisting the disintegrating...beautiful scenery of North Wales and of the Lake District owes its origin to the great development of volcanic |  | | Journal (article/letter/editorial) | | authors are printed in SMALLCAPITALS,subjects in lower-case roman, and localities in italics. Actinolitc...ALABASTER (C. J.), An occurrence of brucite at Merehead quarry, Cranmore, Somerset, 4o0 ALEXANDER (P. O.) and...the Bondoc Peninsula meteorite, I21 (Syn.), MI Bad na h'Achlaise, Assynt, Sutherland, fenitc, microcline...W.), PItlLLIPS (E. R.), and STONE (I. J.), The lower quartzofeldspathic gneiss at Broken Hill, New South... 433 ELSDON (R.), see OPPENHEIM (M. J.), 402 Enstatite, Mayo Belwa meteorite, anal., 487; New Caledonia |  | | Journal (article/letter/editorial) | | wollastonite, 649; lithian tourmaline, 747 Newhurst quarry, Shepshed, Leicestershire, vesigni6ite, 533 Cornwall...* Confluence of Carneal Water and Clenoe Water Germany (Deutschland) Bramburg, G6ttingen, tacharanite...Breitenbrunn ( ~ Breitenhof), Saxony, helvine, 627 Schwarzenberg, Saxony, belvine, 627 ~gi~ (~l~jquO...glauconite, 753 SCOTLAND France Auchinstarry quarry, Kil~yth, Stirlingshire, julgoldite, 761 Blackcraig... 59 Portsoy, Banffshire, migmatites, 66r Ratho quarry, Edinburgh, julgoldite, 761 Champagnac, Cantal |  | | Journal (article/letter/editorial) | | Oompositio,z of some of the Rocks of the Lizard District, by W. H. ltadlo~ton, Esq., M.A., F.G.S. (Read...Cornwall : ' ~ "Sketch of the Geology of the Lizard District," by A. ~[ajendie, i. p. 32. "Hints on the Geology..." by Sir H. Davy, i. p. 3S. "On the Serpentine District of Cornwall," by the Rev. J. Rogers, ii. p. 416...works : ~ "On the Physical Structure of the Lizard District," by Professor Sedgwick (Trans. Cambridge Phil...latter is of the same opinion, but suggests that the gabbro, greenstone (including some of what we now should |  | | Report (issue) | | pattern of the silky chrysotile from the ''Globe" district of Arizona, ,The minerals of the serpentine group...languages of the Teutonic countries, Austria, Denmark, Germany, Norway, Sweden, and Switzerland, it is "serpentin";...designates a green rock usually coming from Italy or Germany, commonly with a mottled appearance and suitable...serpentine of Zoblitz (Zeblich) and Waldheim in Saxony (Agricola, 1546). Some of these rocks are actually...thus "The bold pine-crowned cliffs enclosing the valley are clothed with luxuriant vegetation broken here |  | | Book | | look for. Michael O’Donoghue Proustite (East Germany) 7 Rocks We can define a rock as a large mineral...Darker and even poorer in silica than diorite is gabbro, containing a calcium-rich plagioclase and pyroxene...Granite Nepheline syenite Syenite Dio rite Gabbro Peridotite 13 Dunite Serpentinite Rhyolite...the fixed index (the ordinary ray) at a higher or lower reading than the moveable (extraordinary) ray. Where...incident beam are retarded by passing through to the lower side of the film, rejoining the main beam either |  | | Book (edition) | | dept. (departement), dept. (departamento), dist. (district). Less common terms are not abbreviated, e.g....Scbwarzwald Mts., in the Sailauf quarry, Spessart Mts., Bavaria. both Germany, and from the Rabejac deposit... = = = = = Acanthite, x 16 mm, Freiberg, Germany, H Abernathyite, 12 mm, Ririera/, France, H Abhurite...at the Himmelsftirst mine, Freiberg, both Saxony, Germany. In the subtropical areas acanthite may occur...byssolite. Mono- coast of North America: Kobuk River Valley, Alaska, clinic, C2/m, a,b,c = 9.89, 18.20, 5.31 |  | | Book | | names like granogabbro (granite-gabbro), monzogabbro (monzonite-gabbro), rhyodacite (rhyolite-dacite)...[Vulcan, Roman god of fire], plutonite (Pluto and the lower world), and Pele’s hair (Hawaiian fire goddess)...tribal peoples: bojite (Boii, Celtic tribe in Germany), gondite (Gonds, central India), onkilonite (Onkilones...sthene) are the essential constituents; differs from gabbro by the presence of the Definition proposed prthopyroxene...lUGS, plutonic rock satisfying the definition of gabbro, in which pl/(pl + px + ol) is 10-90 and the opx/(opx |  | | Journal (article/letter/editorial) | | Intrusive Rocks of Strumble Head and the Adjoining District ................................. . ........ 581...Intrusive Rocks of St. David's Head and the Adjoining District ....................................... 584 V...Porphyrite-Intrusions of the Abercastle-Mathrv District .............................. 594 VI. Review...the igneous rocks of the greater part of this district, but the Strumbte-J:[ead rocks have been described...paper on the geology of the F i s h g u a r d District. ~ Adjoining parts of the county have also received |  | | Journal (article/letter/editorial) | | ....... 276 (1) Mainland of Anglesey--south of Valley Station. (2) . . . . near the Lakes. (3) , ,, south.......................... 290 (1) Pyroxenites, Enstatite-rock, et~. (2) Gahbro. (3) Porphyrite (?). (4)...Angleseymsouth of Valley Station, ON t h e e a s t e r n side of t h e ' s t r a i t ,2 is t h e gabbro a t G r...separating Holyhead Island from Anglesey. In the district it is called the ' river.' 3 T. O. Bonney, Quart...Journ. Geol. Soc. vol. xxxvii (1881) p. 40. The gabbro is there described as ' near Ty-newydd' (as shown |  | | Book | | diopside (sometimes subcalcic), phlogopite, enstatite and Ti-poor chromite. Olivine macrocrysts are...magnesian ilmenite, Ti-pyrope, diopside, olivine and enstatite that have relatively Cr-poor compositions (< 2%...jeppeite, armalcolite, shcherbakovite, ilmenite and enstatite. The presence of the following minerals precludes...te madupitica lamproite Hyalo-enstatite-phlogopite lamproite Enstatite-sanidine-phlogopite lamproite...syenite foid-bearing syenite quartz diorite quartz gabbro quartz anorthosite (monzogranite) 65 90 20 |  | | Book (edition) | | Family The Diorite Family --- The Alkali-Gabbro Family The Gabbro Family II. THE HYPABYSSAL ROCKS The...it ; the granite-massifs of the Christiania district are laccoliths rather than bathyliths in Suess'...originated Thus Lawson l has described in the district of Canada vast areas of rocks habit which, according...sometimes form marked features in the scenery of a district for, being more capable of resisting the disintegrating...laccoliths), or composite (as, for example, the gabbro-laccolith of the Cuillin Hills described by Harker |  | | Book | | results in a pseudo-symmetry, i.e. crystals of lower symmetry are twinned in such a way that they form...between that of the sample and that of the next lower grade. In this case we consider the hardness to...Different scratch hardness on kyanite 20 somewhere lower grade adding a half-grade to it. Although the determination...fibrous and porous aggregates often seem to have a lower hardness because of the blank spaces between individual...identification. Nobody should be discouraged by initial bad luck, it is sometimes difficult even for an expert |  | | Book (edition) | | 183 The Diorite Family The Alkali-Gabbro Family - 188 The Gabbro Family 201 186 II. THE HYPABYSSAL...maintains that the granite-massifs of the Christiania district are laccoliths rather than bathyliths in Suess'...Thus Lawson 1I has described in the Rainy Lake district of Canada vast areas of rocks of plutonic babit...sometimes form marked features in the scenery of a district ; for, being more capable of resisting the disintegrating...laccoliths), or coni posite (as, for example, the gabbro -laccolith of the Cuillin Hills described by Harker |  | | Journal (article/letter/editorial) | | Geowissenschaften und Rohstoffe, Hannover, Federal Republic of Germany Textural Features and Chemical Characteristics...June 24, 1981; accepted July 20,1981 Summary The lower ultramafic part of the Chalkidiki Ophiolite Complex...1). Lithologically, this complex consists of a lower layered sequence of dunite and harzburgite, which...between 20 and 60 m, occurs between the upper and lower banded dunite of each cyclic unit. The order of...of olivine, enstatite, and chromite in varying proportions. Concentrations of enstatite and chromite |  | | Journal (article/letter/editorial) | | three large massifs of ophiolites and associated gabbro (SyumKeu, RaiIz, and Voikar), granitoids, and...comagmatic to them occur east of the ultrabasites and gabbro (Fig. 1). The 618 MANTLE ULTRABASITES OF OPHIOLITE...stripe of rocks composing a dun ite–clinopyroxenite–gabbro complex (Figs. 1, 2a). Gabbroids also compose an...tical section, and gabbroids are hosted in its lower part. This “reverse” stratification pattern is generally...of ultrabasite massifs in the Polar Urals. (1) Lower–Middle Paleozoic rift–bathyal com plexes (paleocontinental | | | Book | | results in a pseudo-symmetry, i.e. crystals of lower symmetry are twinned jn such a way that they form...that of the next lower grade. In this case we consider the hardness to be of the lower grade adding a half-grade...fibrous and porous aggregates often seem to have a lower hardness because of the blank spaces between individual...identification. Nobody should be discouraged by initial bad luck, it is sometimes difficult even for an expert...should preferably be more detailed, e.g. walls of a quarry, or refuse heap specimen, so that one could find |  | | Journal (article/letter/editorial) | | I N distinct from that of the rest of Lizard district is very Cornwall. The great plutonic masses of...the county. In the Mevagissey area serpentine and gabbro occur, not unlike those of the Lizard j at Start...petrographical characters the rocks of the Lizard district might be regarded as presumably of Archsean age...End. The plutonic complex consists of serpentine, gabbro and gneiss, and may be described as forming "bosses"..."stocks." The rocks that surround the serpentine and gabbro are older than the plutonic bosses; they represent |  | | Book | | 1. Hornblende-dolerite, Deniston Hill. 2. Enstatite-dolerite, Middleton. 1. Dolerite (Tholeite,...Plagioclase-olivine-augite-mica rock, Ballachulish. 2. Olivine-gabbro, Mull. 1. Dolerite altered 1. !) XIX., *...granite, Tolcarn. 2- Olivine-gabbro, Loch Coruisk. Hornblendic gabbro, Crousa Down. Plagioclase-pyroxene...1. Olivine-gabbro, Skye. XXIII., XXIV., )) XXV., u 2. Haunch. V Foliated Gabbro, rtarakclews...Biotite-granite, Shap. 2. Enstatite-diorite, 1. Enstatite-augite-andesite, Cheviot District. Penmaenmawr. 2 |  | | Journal (issue) | | Elmer N . Anderson ..........22 Minerals of t he District of Columbia and Vicinity, with Pertinent Bibliography.................................... 31 W yarning Valley Historical and Geological Society .......... 31...Quartzglass apparatus. Addreu GEORGE 0. WILD, ldar, Germany For the Advanced Collector I have for sale rare...of a cruise sailing to this remote coal mining district, the idea came to me that if coal was there, why...Spbalerite ,vas found in some quantity in the Bellsund district, bnt the mining neYer paid. However, good specimens |  | | | | referred to in geological literature as the Lizard District although it forms a part of Meneage, an old Cornish...the very extensive literature relating to the district. Dr. W. Pollard and Mr. E. G. Radley have n1ade...beaches, and from Professor Bonney who visited the district \vhen the re-survey was nearly completed and discussed...obscure problems of the geology of the Lizard District with him on the ground. J. J. H. TEALL, Director...CHAPTER I. Introduction ... General features of the district, 1 ; principal towns and villages, 1 ; the Pliocene |  | | Report (edition) | | referred to in geological literature as the Lizard District although it forms a part of Meneage, an old Cornish...the very extensive literature relating to the district. Dr. W. Pollard and Mr. E. G. Radley have n1ade...beaches, and from Professor Bonney who visited the district \vhen the re-survey was nearly completed and discussed...obscure problems of the geology of the Lizard District with him on the ground. J. J. H. TEALL, Director...CHAPTER I. Introduction ... General features of the district, 1 ; principal towns and villages, 1 ; the Pliocene |  | | Journal (article/letter/editorial) | | Schneebergite and nickelschneebergite from Schneeberg, Saxony, Germany: the first Bi-bearing members of the tsumcorite...Metamict aeschynite-(Y) from the Evje-Iveland district (Norway): heat-induced recrystallization and dehydrogenation...mantle component in the origins of the Hercynian gabbro-granite series of the “Serie dei Laghi” (Southern...SHAW, V. TAZZOLI .– Mixing properties of the enstatite-ferrosilite solid solution: I. A macroscopic perspective...DOMENEGHETTI, V. TAZZOLI .– Mixing properties of the enstatite-ferrosilite solid solution: II. A microscopic |
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Gabbro Quarry, Radau valley, Bad Harzburg, Goslar District, Lower Saxony, Germany