A Summary of Progress in Petrography. in 1887-1896 |
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Page 1885
... structure , composition and genesis 1 Edited by Dr. W. S. Bayley , Colby University , Waterville , Me . 2 Zeits . d . deutsch . geol . Gesells . , XL . , 1888 , p . 694 . Bull . Soc . Franc . d . Min . , XII . , 1889. p . 83 . of these ...
... structure , composition and genesis 1 Edited by Dr. W. S. Bayley , Colby University , Waterville , Me . 2 Zeits . d . deutsch . geol . Gesells . , XL . , 1888 , p . 694 . Bull . Soc . Franc . d . Min . , XII . , 1889. p . 83 . of these ...
Page 1886
... structure , with the columns all perpendicular to the surface over which the rock flowed . A petrographical ... structures are 70 [ January , The American Naturalist .
... structure , with the columns all perpendicular to the surface over which the rock flowed . A petrographical ... structures are 70 [ January , The American Naturalist .
Page 1887
William Shirley Bayley. described , and very fine pictures of the structures are given . Without being able to enter into a full discussion of the points so clearly brought out by Mr. Iddings , it is interesting to note that he regards ...
William Shirley Bayley. described , and very fine pictures of the structures are given . Without being able to enter into a full discussion of the points so clearly brought out by Mr. Iddings , it is interesting to note that he regards ...
Page 1893
... structure , composition and genesis 1 Edited by Dr. W. S. Bayley , Colby University , Waterville , Me . 2 Zeits . d . deutsch . geol . Gesells . , XL . , 1888 , p . 694 . Bull . Soc . Franc . d . Min . , XII . , 1889. p . 83 . ATZ He ...
... structure , composition and genesis 1 Edited by Dr. W. S. Bayley , Colby University , Waterville , Me . 2 Zeits . d . deutsch . geol . Gesells . , XL . , 1888 , p . 694 . Bull . Soc . Franc . d . Min . , XII . , 1889. p . 83 . ATZ He ...
Page 1894
... structure , with the columns all perpendicular to the surface over which the rock flowed . A petrographical ... structures are 70 % [ January , The American Naturalist .
... structure , with the columns all perpendicular to the surface over which the rock flowed . A petrographical ... structures are 70 % [ January , The American Naturalist .
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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
Popular passages
Page 5 - The olivine is surrounded by a reactionary rim consisting of an inner zone of hypersthene and an outer one of actinolite.