A Summary of Progress in Petrography. in 1887-1896 |
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Page 1885
... O , Fe , O , FeO MnO MgO 9.17 tr 6.03 Sp . Gr . 2.625-2.628 48.58 32.44 3.15 The mineral is usually fresh , but contains numerous inclusions of silli- manite , whose composition is : Al , O , = 63.52 % , SiO2 = 35.43 % . The granular ...
... O , Fe , O , FeO MnO MgO 9.17 tr 6.03 Sp . Gr . 2.625-2.628 48.58 32.44 3.15 The mineral is usually fresh , but contains numerous inclusions of silli- manite , whose composition is : Al , O , = 63.52 % , SiO2 = 35.43 % . The granular ...
Page 1887
... Fe , O , = 1.80 , CaO tr . It is a manganese willemite with the formula ( ZnMnFe ) , SiO . — De- Saulesite . - Associated with the above - described mineral , and also with sphalerite , chloanthite , fluorite , apatite and nicolite ...
... Fe , O , = 1.80 , CaO tr . It is a manganese willemite with the formula ( ZnMnFe ) , SiO . — De- Saulesite . - Associated with the above - described mineral , and also with sphalerite , chloanthite , fluorite , apatite and nicolite ...
Page 1888
... Fe , О ̧ ( CeY ) , O , PbO CaO H2O PO Ign 13.085 22.43 41.44 .965 .845 6.69 2.16 .41 7.88 1.19 1.23 corresponding to UO ( ThOSi ) ,, ( OH ) 12 , or gummite in which the water has been replaced by thorite.Metagadolinite is a grayish ...
... Fe , О ̧ ( CeY ) , O , PbO CaO H2O PO Ign 13.085 22.43 41.44 .965 .845 6.69 2.16 .41 7.88 1.19 1.23 corresponding to UO ( ThOSi ) ,, ( OH ) 12 , or gummite in which the water has been replaced by thorite.Metagadolinite is a grayish ...
Page 1889
... O , + 8 H2O . [ NiO = 25.01 , CoO = .76 , CaO = 9.32 , As , O , = 39.33 , H „ 0 = 25.01 . - Hydroplumbite and ... Fe , O , MnO CaO MgO HO 20.2 1.5 35.8 .4 -Fouquéite . — In his excellent paper on scapolite rocks , Lacroix 15 ...
... O , + 8 H2O . [ NiO = 25.01 , CoO = .76 , CaO = 9.32 , As , O , = 39.33 , H „ 0 = 25.01 . - Hydroplumbite and ... Fe , O , MnO CaO MgO HO 20.2 1.5 35.8 .4 -Fouquéite . — In his excellent paper on scapolite rocks , Lacroix 15 ...
Page 1893
... O Fe , O , FeO MnO MgO 48.58 32.44 3.15 9.17 tr 6.03 Sp . Gr . 2.625-2.628 = The mineral is usually fresh , but contains numerous inclusions of silli- manite , whose composition is : Al , O , 63.52 % , SiO , 35.43 % . The granular ...
... O Fe , O , FeO MnO MgO 48.58 32.44 3.15 9.17 tr 6.03 Sp . Gr . 2.625-2.628 = The mineral is usually fresh , but contains numerous inclusions of silli- manite , whose composition is : Al , O , 63.52 % , SiO , 35.43 % . The granular ...
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Common terms and phrases
acute bisectrix Al,O Amer AMERICAN NATURALIST amphibole analysis andesites apatite augite axial ratio basalt biotite bisectrix brown Bull calcite Colby University color colorless composition containing cordierite corresponding described diabase diorites double refraction dykes Edited by Dr epidote eruptive Fe,O feldspar FeO CaO MgO FeO MnO Förh formula gabbro garnet Geol gneiss grains granite green ground-mass H₂O hardness hexagonal hornblende inclusions isomorphous Jour Kryst Lacroix lamellæ lithophysæ lustre magma magnetite MAKERS SYRACUSE manganese mica microlites mineral occurs MINERALOGY AND PETROGRAPHY.¹ molecule monoclinic Na,O Na₂O nepheline Neues Jahrb olivine optical angle optical axes original orthoclase orthorhombic Petrog PETROGRAPHY.¹ Petrographical phenocrysts plagioclase pleochroic porphyritic porphyritic crystals pressure prismatic produced pyroxene quartz regarded resembles rhombohedral rocks scapolite schists silica small crystals specific gravity spherulites structure substance symmetry thin section tion twinning plane variety W. S. Bayley Waterville yellow yielded Zeits
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Page 5 - The olivine is surrounded by a reactionary rim consisting of an inner zone of hypersthene and an outer one of actinolite.