 | | Book (volume) | | cura dell'Ufflcio Tecnlco dell'I. I.E. Atlas Dlsegni di Gabriele Pozzi Coordlnatore edltoriale: Ilario Zonca...sono rlservatl In tutto ii mondo Flnlto di stampare nel mese di ottobre 1975 Carlo Maria Gramaccioli...Presentazione ...................... . . Spiegazione di alcune voci mineralogiche Introduzione ...... . ...Principali giacimenti di minerali alp1n1 . . . .. . .... . . .......... 3 I possibili tipi di simmetria ...... . . .. Esempi di classi di simmetria . . . . . . . . ... Relazioni tr:a piu forme di un cristallo . |  | | Journal (article/letter/editorial) | | younger geologic age. Analcime is found in saline-lake and terrestrial sediments in a warm, rather arid...Searles Lake in California and eolian tuff of the Olduvai Gorge in Tanganyika. At Searles Lake, phillipsite...formed by reaction between rhyolitic glass and saline lake water or interstitial water at the early stage of...conditions (HAY, 1963a). Phillipsites of Searles Lake and the Olduvai Gorge have formed under an alkaline...Off Chili (17) 19"S,72"W, Q Off Chili (I) Searles Lake, -_ _ Locality PHILLIPSITE IN SEDIMENTARY ROCKS |  | | Journal (article/letter/editorial) | | visible. Crossed nicols. X60. wackes of the Otama area of Southland. He attributed this to very low grade...laumontite is very much less than in heulandite and adularia from the samearea. RnlrnrNcas Clow, P. T. (1870)...(1948), Prehnite e laumontite del Lago Bianco in Val Bavona (Canton Ticino): Atti Soc. ItaI Sci. Nat. Museo..., 2, 299). Grr,r.trrr.r.r, P. (1928), Laumontite di Toggiano: Rend. R. Accad. Lincei,8, ser. 6a, 1-2...(1944), Some igneous rocks from the New Plymouth area: Trons. Roy. Soe. N ew Z eal,anil,74, 125-153. (1949) |  | | Catalog/List | | developed on usual Gossan matrix. 2£x2xl£", £8.00. ADULARIA/SCHORL. Whiskey Lode,Geevor Mine.Pendeen,West...sprays of terminated,bladed xtls forming a 2x1-J" area on dark, fossiliferous Shale matrix. Specimen ‘A’...and coated in bright orangey * — Curite,plus an area of small sharp xtls! Ex.Hammond Collection. 2x1^x1"... EPIDOTE/ADULABIA/CHLOBITE . St.Gothard,Ticino,Switzerland. Nice attractive, typically Alpine Suite...irsed between upstanding Chlorite-coated,platy Adularia crystals. 2x1-£x1-£"', £8.00. 122. ETTRINGITE |  | | Book | | Professor Dr. ERMANNO GALLI Istituto di Mineralogia e Petrologia Universita di Modena Via S. Eufernia 19 1-41100...The facilities of the Centro Strumenti and Centro di Calcolo of Modena University were used for preparing...similar to a closed system, as typified by the saline lake basins. The Green River formation, including some... Punchbowl, Manana Island, Ulupau Head and Salt Lake Tuff, natrolite occurs with thomsonite and gonnardite...diorite from Bergen Hill, New Jersey; at Copper Falls, Lake Superior; - in the eleolite-syenite from Magnet |  | | Book | | land surface, freshwater lake, or shallow sea; into a saline, alkaline lake; or into the ocean. LAND...hyd ,olog,ic system, because th,e water enters the lake and can only leave by evaporation. The zelolite...kaline lakes, are zoned ~ om the edge of the former lake to the center" reflecting the differences in, chemical...pH of the water in the lake (Fig. 2). Ash that falls ,on the shore of the lake is not alt1ered. Ne,ar...the e-dge of the lake w'here the pH ·s near n,eutral, but near th,e center of the lake, potassium-rich | | | Book | | land surface, freshwater lake, or shallow sea; into a saline, alkaline lake; or into the ocean. LAND...hyd ,olog,ic system, because th,e water enters the lake and can only leave by evaporation. The zelolite...kaline lakes, are zoned ~ om the edge of the former lake to the center" reflecting the differences in, chemical...pH of the water in the lake (Fig. 2). Ash that falls ,on the shore of the lake is not alt1ered. Ne,ar...the e-dge of the lake w'here the pH ·s near n,eutral, but near th,e center of the lake, potassium-rich |  | | Book | | pressure either locally or extending over a large area, it is said to be metamorphosed. There will be alteration...The wood of the ‘pencil’ is replaced by metal. The area to be tested should be the pure mineral, not a coating...museum, if the serious collector knows that the area in which he has been operating is mineralogically...Quebec (Canada), Orkney and Faroe Islands, Fassa Valley, Tirol (Austria), St Andreasberg, Harz Mountains...rock crystal. Finest examples come from central Switzerland, especially from the Binntal, Tavetsch and St |  | | Book (volume) | | intermediate microclines. A further potassium felspar, adularia, is one which is recognized principally by its...Pericline is the sodium felspar counterpart of adularia, and it has a similarly restricted paragenesis...non-rectangular. Adularia is called after the locality in the Adular Mountains, Switzerland. Sanidine is...have a relatively large content of NaAlSi308. Adularia is the only alkali felspar consistently to have...which atoms are labelled only within the unique area, and Fig. 5a shows part of the structure as viewed |
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