 | | Journal (article/letter/editorial) | | in diameter, a r e filled with small plates of tridymite interspersed and intergrown with hornblende, golden-yellow...lamine of iron-glance. A similar occurrence of tridymite has been discovered in the Siebengebirge, in a...diameter) are thickly lined and partly filled with tridymite, associated with small octohedrons of magnetic...the silica from which this large quantity of tridymite has been formed was not derived from these walls...mass and penetrating into its inmost cavities. Tridymite, which has for some time been vainly sought for |  | | Journal (issue) | | iently to find the way down . The geology of the Rhine Valley was interesting , but it has already been...These are all of a volcanic character . The Drachenfels , the Wolkenberg and the Lolerberg are of trachyte...only be seen all together , from near Cologne . Beyond Cologne the river expands and forms with its delta...of Holland . The table - land through which the Rhine valley has been cut , con sists of much twisted...indestructibility . Down to the confluence of the Sieg , these are often accompanied by a species of clay |  | | Journal (article/letter/editorial) | | of Tridymite. By A. S T R E N(JahrG buch fur Mineralogie, 1871, 933.) THEoccurrence of tridymite has...lined with great numbers of small crystals of tridymite in the characteristic forms of this mineral, namely...exactly like those from the trachyte of the Drachenfels, and mostly united in twins, triple crystals...above mentioned contains a larger proportion of tridymite than any trachyte. According t o Laspeyres, the... 65.8 p. c. silica. I n the trachyte of the Drachenfels the silica amounts t o 64.67 p. c. ; in that |  | | Journal (article/letter/editorial) | | America * and elsewhere5 contain olivine and tridymite, while the author has described pitchstone-porphyries...the latter may finally crystallize as quartz or tridymite. The other possibility is that the reaction olivine...modification of silica stable above 1,470°; /3-tridymite, between 870° and 1,470°; /3-quartz between 575°...occurrence of tridymite in certain effusive rocks, such as the trachyte of Drachenfels, is well known...modifications which fail to appear. In the case of tridymite, quartz, etc., the change is apparently physical |  | | Book | | immensely popular handbook of minerals appeared in Germany I obtained a copy fo! my personal library and was...far from a simple task because the "'Gewstones of North America. 8 artist must know minerals in order...fibrous sphalerite from Diepenlinchen, near Aachen, Germany. PLATE Vo I~ .·• / ~1 rhyolite 37 r . ...chalcopyrite from Herdorf, Siegerland, Germany. Center. Pyrrhotite. Harzburg, Germany. Below Massive chakopyrite...siderite and calcite crystals. Clausthal, Harz Mts., Germany. PLATE 5 • • 4J animals (bitumen, oil) has |  | | Book | | pyrite — marcasite, quartz — cristobalite — tridymite, rutile — brookite — anatase. Appearance and...Nickel Pyrites, Nickel Glance) Harzgerode, Harz, Germany tin-white to light steel-grey metallic opaque...Mountains, Germany ARSENOPYRITE FeAsS (Arsenical Py- rite, Mispickel) Freiberg, Ore Mountains, Germany tin-white...clays PYROPHYLLITE Al, [(OH)2S8i40;0)] Badin, North Carolina, USA talc, kaolinite white, white-grey... Gerinany CARNALLITE KMgCl; .6H,O Stassfurt, Germany INYOITE Ca[B;03(OH)s] . 4H Mount Blanco on Furnace |  | | Book (edition) | | covers 250 miles from east to west and 150 from north to south. All round the margin of this complex intrusive...descending to lower and lower horizons from south to north. The Duluth, the Sudbury and the Bushveld lopoliths...Cg.; above ~at temperature it tqmsforms into tridymite. Quartz itself exists in two forms which differ...Quartz alone is found in deep-seated rocks, but tridymite is not uncommon in acid lavas. Chalcedony and...basis of geological age, which was current in Germany in his time but has since been abandoned by everybody |  | | Book | | (420 tons); others localities include Mansfeld (Germany), Bisbee (Arizona), Tsumeb (Namibia) and Surra...native sliver include Kongsberg (Norway), Freiberg (Germany), Jachymov (Czech Republic), the Comstock Lode...(Italy), ldrija (Slovenia), Moschellandsberg (Germany) and Juan Cavelica (Peru). Almaden Is the oldest...Is found In Erzgeblrge and the Harz Mountains (Germany), Glkos (Russia), Sterling Hill (New Jersey, USA)...silver and arsenic. It is found at St Andreasberg (Germany), Sala (Sweden), Coimbra (Portugal), Prlbram (Czech | | | Book | | (420 tons); others localities include Mansfeld (Germany), Bisbee (Arizona), Tsumeb (Namibia) and Surra...native sliver include Kongsberg (Norway), Freiberg (Germany), Jachymov (Czech Republic), the Comstock Lode...(Italy), ldrija (Slovenia), Moschellandsberg (Germany) and Juan Cavelica (Peru). Almaden Is the oldest...Is found In Erzgeblrge and the Harz Mountains (Germany), Glkos (Russia), Sterling Hill (New Jersey, USA)...silver and arsenic. It is found at St Andreasberg (Germany), Sala (Sweden), Coimbra (Portugal), Prlbram (Czech |  | | Journal (article/letter/editorial) | | sich affncn, so am Drachenfels, wahrend an der Perlenhaardt die schilnsten Tridymite sicli auf der Oberflache...ihrer Oberk h e zwar Schmelzrinclen aber keine Tridymite auf. Vermuthlich konnten letztere Krysfalle sich |  | | Book (volume) | | reserved. H., Hofbuchdruckerei, Cothen-Anhalt (Germany). PRECIOUS The Precious Stones. Precious others...hollowed out The vacant. man form the on left Germany with to be have posture greater a window...localities from is time diamonds had been north to in in thin a the beds of the of majority... Guiana the the guard of United States of North America British usually are colour probably...Corundum mine, hexagonal Macon and prism Co., North sapphire”), hexagonal sapphire”), faceted base |  | | Book (volume) | | BARIUM FELSPARS.166 SILICA MINERALS.179 Quartz, Tridymite, Cristobalite . . . . .179 NEPHELINE GROUP...Microcline perthite, syenite, Plauen, near Dresden, Germany (Byelyankin & Tomkeieff, 1916). 0-*^ °"*»- India...9. Sanidine (“anorthoclase”), Drachenfels, Siebengebirge, Rhine, Germany (Spencer, 1937). Anal. E. Spencer...Vogelsberg, Hesse, Germany (Tilley, 1958). Anal. J. H. Scoon. 14. Sanidine, Eifel district, Germany (Kozu & Seto...probably from basaltic tuff, Eifel, Rhineland, Germany (Spencer, 1937). Anal. E. Spencer. 16. Sanidine |  | | Book (edition) | | The geological thermometer High and low quartz Tridymite ... Calcite and wollastonite Action of peridotite...The Jnyo batholith, California 33. The country north of Lake Huron, Ontario l 34. The Vermilion batholith...pressure, at all temperatures up to 870° C.; tridymite between 870° and 1470° C.; and cristobalite from...which ensure free movement of the molecules, both tridymite and cristobalite transform into quartz when the...unfavourable to it. Thus one can understand why tridymite and cristobalite are often found in lavas, but |  | | Book (edition) | | Hig-h and low quartz IN THE MAGMA mag-ma •• Tridymite Calcite and woUastonite Action of peridotite...Belgian The Inyo batholith, California The country north of Lake Huron, Ontario The Vermilion batholith,... pressure, at all temperatures up to 870" C. tridymite between 870° and 1470° C. and cristobalite from...which ensure free movement of the molecules, both tridymite and cristobalite transform into quartz when the...unfavourable to it. Thus one can understand why tridymite and cristobalite are often found point at 1713° | | | Book | | 3 Distributed in Australia by Rigby Limited 30 North Terrace, Kent Town Adelaide, South Australia 5067... pyrite — marcasite, quartz — cristobalite — tridymite, rutile — brookite — anatase. I b g £ I I i...Nickel Pyrites, Nickel Glance) I Lu erode, Harz, Germany tin-white to light steel-grey greyish black metallic...Py rite, Mispickel; Freiberg, Ore Mountains, Germany tin-white to grey greyishblack metallic opaque...NiAs, (White Nickel) Schneeberg, Orc Mountains, Germany Table 2 9 10 11 12 13 14 15 16 & ?-T |  | | Book | | vaspian Sea, hina, ndia, etc. ‘ornwall, farz Mts. Germany), ‘io Tinto Spain), Chile chalcopyrite (copper...fibrous, encrusting aggregates, radiating Javaria Germany), -rimea, 3olivia prismatic crystals (monoclinic)...“ongo), valuable nickel ore (local) (NiMg)6(OH)s North — izard Garnierite (Noumeite) columnar, radiating...irzgebirge, pyrargyrite Proustite slack Forest Germany), (dark red silver ore) (Light Red Silver Ore)...all potassium Polyhalite —_—_—————— Stassfurt (Germany), salts K2Ca2Mg[SO4]q4. 2H20 Alps, Texas Common | | | Book | | pyrite - marcasite, quartz - cristobalite - tridymite,rutile brookite - anatase. Appearance and Development...Harzgerode, Harz, Germany - CHLOANTHITE . NiAs3 (W hite Nickel) Schnee berg, Ore Mountains, Germany - ARSENOPYRITE...Pyrite, Mispickel) >-Freiberg, Ore Mountains, Germany S K UTTERUDITE CoAs (Smaltite) Bou Azzer, Morocco...Denmark PYROPHYLLITE Al2 [(OH) 2Si4O1ul '-'--Badin, North Carolina, USA SEPIOLITE Mg.1 [(OH)!Si,iO , bl ....-anhydrite, kainite, - - SYLVITE KC! Stassfurt, Germany - - tabular crystals, with orthorhombic habit |  | | Book | | Carolina Biological Supply Company of Burlington, North Carolina. To those whose efforts made the use of...Aztecs, Bantus, Mayas, Mongols, New Zealand Maoris, North American Indians, Tartars. Although uncommon, some...tribal peoples: bojite (Boii, Celtic tribe in Germany), gondite (Gonds, central India), onkilonite (Onkilones...salts overlying rock salt deposits at Stassfurt, Germany. [G. Abraum, refuse; the salts were originally...identical to tridymite alboranite but containing quartz instead of tridymite. alboranite, tridymite ig. extru |  | | Book | | presently includes BIRDS OF NORTH AMERICA, SEASHELLS OF NORTH AMERICA, TREES OF NORTH AMERICA, and NATIONAL...Villiaumite (p. 122) . Acanthite Freiberg, E. {p. Germany 94) 76 Stromeyerite Broken Hills, N.S.W. Australia...Common are olivine, (Mg,Fe)2Si04; cristobalite and tridymite, the two high-temperature forms of SiOj; and pyroxferroite...southern Rocky Mts. Deposits also are mined In West Germany, Australia, Czechoslovakia, Norway, Ontario, Montana...cinp. 84), notably in Italy, Yugoslavia, West Germany, Spain, Texas, and California. It is uncomliquid |  | | Book | | occasionally acquire e.g., pseudo- aragonite and tridymite. CHAPTER II THE PHYSICAL PROPERTIES OF MINERALS...zirconium and SnO 2 . silicon, ZrO 2 .SiO, Tridymite dioxide of silicon, SiO 2 (rhombic). Quartz dioxide...variety sanidine elongated known from the Drachenfels vertically, with ; as (3) dominant prism...in Canada Ontario, Mine), (Vermilion and North Carolina (Cowee Valley). ORES OF GOLD. The chief.... 41,000 Japan ... ... ... ... 41,000 Germany ... ... ... 24,000 Russia ... ... ... |  | | Book (volume) | | illore e LOy] - 108 LOO 2) CLIO aig 5 + ITO North and West Britain . . I19| Sand-dunes . : 5 Mid Britain...In the Hebrides, &. Along the Grampians In the North-Western Scenery of gneiss and Scenery of quartz...of regular structure in the mines of England, Germany, Sweden, &c, 4. The remains of plants and animals...Werner contemplated the rocks and metallic veins of Germany, was the relative period of ~ Figs x. their...that the order of succession among these rocks in Germany would be found to prevail in all parts of the world |  | | 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...Xenotime Melilite group Si02 group Quartz Chalcedony Tridymite Chabazite Minerals with uniaxial negative character...Schwabische Alb and in the Laacher volcanic areas of Germany. 2. We give emphasis to the common minerals. They | | | Book | | Villioumite (p. 122) Aconthite Frei berg , E. Germany (p. 94) Stromeyerite Broken Hills , N .S.W.,...are olivine, (Mg, Fe) 2SiO4; cristobalite and tridymite, the two high-temperature forms of SiO 2; and...southern Rocky Mts. Deposits also are mined in West Germany, Australia, Czechoslovakia, Norway, Ontario, Montana...(HgS, p. 84), notably in Italy, Yugoslavia, West Germany, Spain, Texas, and California. It is u ncom mon...Madagascar, Finland, West Germany, Ireland, Australia, Columbia, Brazil, Peru, North Carolina, and California |  | | Book | | average composition of about An6, while in the North Jay-Hallowell granite it averages about An9 (13)...the figure, and the clear area of quartz in the north-west may represent original material. B. Greisen...(8) Sabine, P. A., i960. The geology of Rockall, North Atlantic. Bull. geol. Surv. U.K. 16, 156-78. (9)...84-104. (21) Langton, C. M., 1935. Geology of the north-eastern part of the Idaho batholith and adjacent...aplite-pegmatites of the Franklin-Sylva district, North Carolina. Am. Miner. 50, 1681-97. (33) Good accounts |  | | Book (edition) | | active workers in this endeavor were in Sweden and Germany, and the greatest (1750-1817), Professor at the...the Zentralblatt fiir Mineralogie, published in Germany. Chemical Abstracts, published by the American...” The shortage of materials in this category in North America led to extensive prospecting for new mineral... to Une south pole. By projecting them to the north pole, however, their ice Perec poles then fall within...longitude, and small circles centered about the north and south poles appear as lines of equal latitude |
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