 | | 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) | | 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) | | Fen, magnesio-arfvcdsonite, 317. Hasvik, SOrOy, gabbro, 815. Sulitjehna, almandine, biotite, hornblende...Viisterbotten, montcbrasite, 414. Germany (Deutschland) Chursdorf, Penig, Saxony, amblygonite, 414. Drachenfels...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... 153. Meidling im Tal, Lower Austria, omphacite, 6I. Mitterbachgraben, Lower Austria, omphacite, 6i. |  | | 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 |  | | Report (issue) | | ------------ .. -.-.--- ·----- -.-------- ·--Oligoclase gabbro or kauaiite ................................................................... __ . Hock :from quarry near Moiliili Chmch ................................ _.... ___ . _.. __ .. _ Bowlders of Waihee Valley .................................................................... . Bowlders of lao Valley . ." ...................................................................................... . 34 Dunite, gabbro, and other granular inclusions in basalt ..... |  | | 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 (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 (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) | | 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...cell-size, 942. Angouria, Egypt, antigorite, 493. Anorthite, New Zealand, anal., opt., 375; crystallization...A.), and GLASSER (F. P.), Crystallization of anorthite, 78o. Bhavani Sankar mine, Tummalatalupur, Nellore |  | | Book | | Binding: Lüderitz & 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 |  | | 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 |  | | Report (volume) | | of the Minnesota River Valley............................... Courtland district ........................................................ Fort Ridgely district............................................................................................... Lower Sioux Agency area. .................................................................. Vicksburg district ................................................... Gabbro-schists...................................................... Granite Falls district..... |  | | Report (issue) | | 24 35 1. N. W. i, Sec. 3, augite. W. Anorthite; non-diallagic — Fig. The same in polarized...Duluth, Minn. N. W. i, Sec. 24, T. 50, K. 14 W. Anorthite; diallagic augite; titaniferous mag- Fig. 4...Sec. 7. T. 51, E. 12 Fig. 2. Fig. 3. W. Anorthite; diallage; olivine. Scale, 25 diameters. —The...Eiver Bay, Minn. S. E. i. Sec. 2, T. 51, E. 12 W. Anorthite ; diallage titaniferous magnetite olivine. Scale...diameters. IV. —Thin section of coarse olivine-gabbro from Bladder Lake, Ashland County, Labradorito; |  | | Report (volume) | | Introduction 3 9 Summary 3 11 CHAP. I. The limits of the gabbro area near Baltimore and the general char13 acter...description of the hypersthene-gabbro 3 18 III. Petrographical description of the gabbro-diorite 3 27 34 IV. Genetic...the hypersthene-gabbro and the gabbro-diorite.3 1. Geological relations of the gabbro and diorite to each...relations of the gabbro and diorite 3 37 40 3. Microscopical relations of the gabbro and diorite 3 45... General conclusions 3 V. The olivine-bronzite-gabbro, peridotites, and associated serpentines and amphibole |  | | 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...section. The following are examples: 1. AXINITE. ANORTHITE. AMBLYGONITls,. The difference in angle from |  | | Book (edition) | | substances mixtures anorthite-diopside anorthite-wollastonite -silica albite-anorthite ... diopside-plag-ioclase...shonkinite Trachyte Monzonite and diorite Andesite Gabbro, anorthosite and diabase Basalt Perknite References...(nON-FELDSPATHOIDAI.) ROCKS AND GENESIS —OCCURRENCE Olivine-gabbro and peridotite Peridotite and serpentine Kimberlite...to Daly's hypothesis Carbonatites The foyaite-gabbro Xlll association Daly's hypothesis, conclusion...Diorite and anorthosite G. Andesite H. Gabbro and soda-gabbro 403 406 409 414 417 419 A.- Mineraloi^y |  | | Book | | Tubingen Germany and c. Schmitt-Riegraf Lecturer in Mineralogy University of Munster Germany Translated...Chapman & Hall GmbH, Pappelallee 3, 69469 Weinheim, Germany Chapman & Hall USA, 115 Fifth Avenue, New York...Verlag, P.O. Box 30 03 66, D-70443 Stuttgart, Germany Softcover reprint of the hardcover 2nd edition...Schwabische Alb and in the Laacher volcanic areas of Germany. 2. We give emphasis to the common minerals. They...So St TA Ze Albite Aegirine-augite Actinolite Anorthite Apatite Biotite Calcite Chalcedony Chlorite Clinopyroxene |  | | Book (edition) | | labradorite, bytownite (series end-members albite and anorthite). These transitional members largely dominate...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 |  | | 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 (volume) | | twenty-four names, nine are mine. This, however, is not as bad as it may seem. The feldspathoid-pyroxene rocks,...Quartz Crystal in Fleckschiefer, from Albernau, Saxony. (30 U) (J) 24. Bent Mica in Marble from Pargas...H = M. M E. 1 = LIST OF ILLUSTRATIONS XX Gabbro from Schmalenberg, Harz 25. Bent Feldspar Lamellae...Quartz-Porphyry from Melibocus, Odenwald, Germany (3197 U) (M) 29. 30. Embayed Saxony (155 U) (J) Embayed Crystal..... Parallel Texture in Orthogneiss, Freiberg, Saxony (4233 U) (M) Xenomorphic-Granular Texture in Hypersthene-Diorite |  | | 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 California’s Central Valley, it is substances like zinc and lead that join...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...drop away down these 'faults' to open up a rift valley, flanked by mountains formed from blocks that didn't |  | | Book (edition) | | Mineralogie, Geologic und Palaeontologie, Stuttgart, Germany. Quar. Jour. Geol. Soc., or Q. J. G. Geological...geologischen Geseli- Germany. Zestschrift ftir Krystallographie, Munich, Germany. TABLE OF CONTENTS...one triad, aluminum, satisfy the acid radicle. Anorthite, on the other hand, is a salt of 2(H 4 SiO 4)...If O O molecule, NaAlSi 3 8 by Ab; and the anorthite, CaAl 2 Si2 8 by all the intermediate feldspars...Ab,Anj through An 8 to An. Ab An Ab l An 6 ; anorthite x Ab l 3 bytownite This conception of feldspars |  | | 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 | | 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) | | suggestion is put forward that the isomerism of anorthite and scapolite may be explained by a difference...difference in the position of the calcium,-anorthite, which easily gelatinises with hydrochloric acid, containing...calcium silicate and alumina, thus :- 0- 0- Anorthite. Scapolite. The author proposes to divide silicates...L~~~bachite.-Keroliteis of frequent occurrence in Saxony, being found in the cavities of the melaphyre-conglomerates...melaphyre-conglomerates of Zwickau, in the melaphyre of the Plaun valley, in certain limestone beds, and in the serpentines |
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