 | | Book | | look for. Michael OâDonoghue 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...crystals of vesuvianite, garnet, scapolite and spinel can be found in altered limestones from places...Granite Nepheline syenite Syenite Dio rite Gabbro Peridotite 13 Dunite Serpentinite Rhyolite...the cations are much smaller than the O2" anion. Spinel, cassiterite, and chromite are important oxides |  | | Journal (article/letter/editorial) | | Fen, magnesio-arfvcdsonite, 317. Hasvik, SOrOy, gabbro, 815. Sulitjehna, almandine, biotite, hornblende...Viisterbotten, montcbrasite, 414. Germany (Deutschland) Chursdorf, Penig, Saxony, amblygonite, 414. Drachenfels...Pfalz, alkali feldspar, 489. Dreiser Weiher, Eifel, spinel-lherzolite xcnoliths, 736. Harzgerode, Harz, ulhnannite...Berkshire; Ha#on attd Shabbington Wood, Buckinghamshire; Lower Froyle, Selt)orne, and West Worldham, tlampshire;...Upnor, Kent. Cornwall Bosahan quarry, Falmoath, biotite, 21o. Dean quarry, Coverack, The Lizard, analcime |  | | 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 |  | | Book | | Binding: LĂźderitz & Bauer, Berlin. Printed in Germany. Dedicated to my former teacher and friend Professor...Grigoriev (U.S.S.R) Prof. Dr. F.K. Drescher-Kaden (Germany) Mr. D. Minatidis (Canada) Dr. E. Mposkos (Athens)... Dr. Thesis, University of Frankfurt am Main, Germany. Fig. 551, by Wager and Deer from Theoretical Petrology...been observed in Hadabudussa/GariBoro area (Adola district, S. Ethiopia). Fig. 187 shows amphibolite with...of anthophyllite formation must have been much lower than the temperature given by the metastable transformation |  | | 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. |  | | Journal (article/letter/editorial) | | authors are printed in SMALLCAPITALS,Subjects in lower-case roman, and Localities in italics. The minerals...i28. Amblygonite, France, Maine, New South Wales, Saxony, anal., cell-dimensions, distinction from montebrasite...albite, I56; - - , anal., d2o i, 489. Amoibite, Germany, anal., opt., X-ray, 26. Amos Stream, New Caledonia...Australia, alkali feldspar, anal., d2oi, 489. Bosahan quarry, Falmouth, Cornwall, biotite, 2IO. BOWDEN (P.)...nodules, olivine, orthopyroxene, clinopyroxene, spinel, 375. Brockham, Surrey, heulandite, 480. Brittle |  | | Book | | Martin Meschede Laurence N. Warr The Geology of Germany A Process-Oriented Approach Regional Geology...Reviews Series editors Roland Oberhänsli, Potsdam, Germany Maarten J. de Wit, Nelson Mandela University, Port... Martin Meschede ⢠Laurence N. Warr The Geology of Germany A Process-Oriented Approach 123 Martin Meschede...and Geology University of Greifswald Greifswald, Germany Laurence N. Warr Institute of Geography and Geology...Geology University of Greifswald Greifswald, Germany ISSN 2364-6438 ISSN 2364-6446 (electronic) Regional |  | | 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 | | A CHANGING PLANET 11 Vanadinite, San Carlos district, Chihuahua, Mexico * 8 x 4 x 2 cm Mineral Species...manganese oxide on limestone, Solnhofen, Bavaria, Germany * 11.5 x 24 x 0.5 om MINERALS: PRODUCTS OF A...such as Porcupine and Hemlo districts; Noranda district, Quebec. USA: Mother Lode belt and others in...Localities Canada: Cobalt mining district and Thunder Bay District, Ontario. USA: several localities... Wire silver, Silver Islet Mine, Thunder Bay District, Ontario, Canada * 11.5 x 14x 11 om Silver has |  | | Book | | structures, for example, synthetic diamond, synthetic spinel, and synthetic sapphire; nor are seashells, bones...names like granogabbro (granite-gabbro), monzogabbro (monzonite-gabbro), rhyodacite (rhyolite-dacite)...[Vulcan, Roman god of fire], plutonite (Pluto and the lower world), and Peleâs 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 |  | | Journal (article/letter/editorial) | | Ferruginous Hornfels from Riekensgliick, Harz Mountains, Germany K. A b r a h a m and W. Schreyer Institut ffir...ffir Mineralogie, Ruhr-Universit~t Bochum, Germany Received April 9, 1973 Abstract. T h e hornfels first...q u e , mineral assemblage olivine-cordierite-spinel-garnet-gedrite-biotite(-tourmaline)-FeTi oxides...cordierite-biotite-gedrite-olivine-garnet-hercynite-rich spinel. On the basis of the experimental results of Hsu...the assemblage olivine-cordierite-spinel, and a subsequent, lower-temperature stage 2, in which the additional | | | 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) | | by concentrically zoned duniteâclinopyroxeniteâgabbro (âplatinumbearingâ) and ophiolitic massifs with...with intensely serpentinized rocks of the duniteâharzburg ite complex being the most widespread. Direct...[1, 3â5, 7â11, 14]. The wellknown Klyuchevskoi gabbroâultramafic massif is the most representative ophiolitic...top downward): duniteâwehrliteâ clinopyroxeniteâgabbro (layered part of the ophiolite section) and duniteâharzburgite...peridotites). The duniteâwehrliteâclinopyroxeniteâgabbro com plex constitutes several tectonic blocks in |  | | Book (volume) | | reserved. H., Hofbuchdruckerei, Cothen-Anhalt (Germany). PRECIOUS The Precious Stones. Precious others...like will the is light quartz from the lower jour setting, a are at on quartz all much... or viewed from a) below, b) of portion lower is colour made or be in the in cut of at...cutting may simply cut so stones form while the lower frequently most diamonds of cutting frequently...hollowed out The vacant. man form the on left Germany with to be have posture greater a window |  | Silantyev, S. A., Krasnova, E. A., Cannat, M., Bortnikov, N. S., Kononkova, N. N., Beltenev, V. E. (2011) Peridotite-gabbro-trondhjemite association of the Mid-Atlantic Ridge between 12°58Ⲡand 14°45â˛N: Ashadze and Logachev hydrothermal vent fields. Geochemistry International, 49 (4) 323-354 doi:10.1134/s0016702911040070 | Journal (article/letter/editorial) | | 2011, Vol. 49, No. 4, pp. 339â372. PeridotiteâGabbroâTrondhjemite Association of the MidAtlantic Ridge...the Nd isotopic compositions of the rocks of the gabbroâperidotite association. The trondhjemites of the...oreforming potential. Keywords: midocean ridge, gabbro, peridotite, oceanic lithosphere, petrology, geochemistry...(USA) in 1997; Yokosuka (Japan) in 1998; Meteor (Germany) in 2002, 2003, 2005â2007; James Cook (United Kingdom)...complex at several sites in the slopes of the rift valley between 14° and 16°N. Since 1992, the ocean floor |  | | Journal (article/letter/editorial) | | greywackes and sandstones (GivetianâVisean, Variscides, Germany) as indicators of ultramafic source rocks MARTIN...Braunschweig, Postfach 3329, D-38023 Braunschweig, Germany (Received 11 November 1998; accepted 29 March...chiefly Alpine-type peridotites. Due to the onset of spinel sedimentation in Givetian times, these peridotites...of spinels, but without any further description. Spinel contents of up to 0.6 % of the translucent heavy...of the Mid German Crystalline Rise (MGCR), with spinel occurrences investigated by microprobe. block |  | | Journal (article/letter/editorial) | | ophiolites as a genetic asso ciation of peridotites, gabbro, dolerites, and basalts. The Penrose Conference...Usteya, Pyshma, and Asbest duniteâcli nopyroxeniteâgabbro complex; and accompanying the Mariinsk, Yazâva...duniteâwehrliteâclinopy roxeniteâgabbro, Serov duniteâharzburgite, and Asbest duniteâharzburgiteâgabbro complexes in order...1998 the Usteya duniteâwehrliteâclinopyroxeniteâgabbro com plex along the eponymous river near Krasnoturâinsk...pyroxeni tes, and olivine and pyroxeneâamphibole gabbro con ditionally attributed to the Late Ordovician |  | | | | borate, and phosphate groups are included. Corundum, spinel, cuprite, rutile, cassiterite, calcite, aragonite...variable), p. 218 thodochrosite (red, pink), p. 152 spinel (red, brown, black), p. 110 rhodonite (red, brown-red)...rhyolite (p. 256) Medium diorite (p. 250) Dark gabbro (p. 252) andesite (p. 260) basalt (p. 262) obsidian... In the southern prairies and the St. Lawrence valley, this fragile layer of sediments produced fertile...Township, Cochrane District, Ontario; Darwin Mine, McMurray Township, Algoma District, Ontario; nuggets |  | | 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 | | immensely popular handbook of minerals appeared in Germany I obtained a copy fo! my personal library and was...culture, derives its name from the saltmining district of Hallstatt in Upper Austria, where many prehistoric...minerals are concerned. Opal is still thought to bring bad luck, and similar stories are told about certain...of these fourfold axes in all. The considerably lower symmetry of a monoclinic crystal is shown in Fig...crystallographic symmetry of a body may often be lower than its apparent geometric symmetry. In a pyrite |  | | Book | | minerals are the raw materials of the landscape. Every valley, hill and mountain peak is made entirely of rocks...just 20km/12 miles beneath Californiaâs Central Valley, it is substances like zinc and lead that join...solid. refracted (bent) as they pass through spinel and garnet. Deeper down still, of perovskite...so great that the iron simply cannot melt. The lower mantle is 6702,900km/420-1,800 miles down. Here...the underside of the crust, creating rocks like gabbro. Some oozes up into vertical cracks created by |  | | Journal (article/letter/editorial) | | exhumation through vertical extrusion of the orogenic lower crust. Keywords: high-pressure granulites, PâT path...Moldanubian Zone of southern Bohemia, Moravia and Lower Austria, 2 â Saxonian Massif, 3 â MĂźnchberg Massif...described from the Saxonian Granulite Massif in Germany, its type locality, in 1803 by Weiss as Weisstein...leucogranulite and c â hyperpotassic granulite, PleĹĄovice quarry, BlanskĂ˝ les Massif. lites with similar lithology...Armorican Massif in France or Black Forest in Germany (Pin and Vielzeuf 1983). Regional tectonic importance |  | | 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 iteâclinopyroxeniteâgabbro complex (Figs. 1, 2a). Gabbroids also compose an...tical section, and gabbroids are hosted in its lower part. This âreverseâ stratification pattern is generally...to the systematic ori entation of pyroxene and spinel accumulations. The rocks contain rare conformable |  | | 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 |  | | Book (edition) | | scale to soapstone at the other. There is a still lower limit in liquids and gases; but of the hardness...the planes of the trisoctahedron in Fig. 21. The lower one of the three on the upper front solid angle...by a constant ratio, and the expression for the lower right one of the six planes will be 3c f & la. By...planes will remain essentially the same. In Fig. 10, bad the plane lettered | been made the plane 1, then...being here directly over those suppressed in the lower pyramid. APATITE. If the student will shade over |
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