A Summary of Progress in Petrography. in 1887-1896 |
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Page 1885
... magma of the eruptive . — Lacroix intends to make a complete study of pyroxene gneiss , and of rocks containing scapolite . He has published the first results of his work in a very excellent paper which is occupied with descriptions of ...
... magma of the eruptive . — Lacroix intends to make a complete study of pyroxene gneiss , and of rocks containing scapolite . He has published the first results of his work in a very excellent paper which is occupied with descriptions of ...
Page 1893
... magma of the eruptive . - Lacroix 3 intends to make a complete study of pyroxene gneiss , and of rocks containing scapolite . He has published the first results of his work in a very excellent paper which is occupied with descriptions ...
... magma of the eruptive . - Lacroix 3 intends to make a complete study of pyroxene gneiss , and of rocks containing scapolite . He has published the first results of his work in a very excellent paper which is occupied with descriptions ...
Page 9
... magma before its solidification . The mineralizing agents in turn show their effect upon the magma in the nature of the minerals separated from it.- -Renard 5 announces that the rocks of St. Thomas , in the Antilles , are diorites ...
... magma before its solidification . The mineralizing agents in turn show their effect upon the magma in the nature of the minerals separated from it.- -Renard 5 announces that the rocks of St. Thomas , in the Antilles , are diorites ...
Page 7
... magma yielding these and the granite has gone on progressively , the porphyritic rocks representing an intermediate stage in the formation of a granite from a magma . Schistose granites ( gneisses ) on the peripheries of these same ...
... magma yielding these and the granite has gone on progressively , the porphyritic rocks representing an intermediate stage in the formation of a granite from a magma . Schistose granites ( gneisses ) on the peripheries of these same ...
Page 8
... magma before its solidification . The mineralizing agents in turn show their effect upon the magma in the nature of the minerals separated from it.Renard announces that the rocks of St. Thomas , in the Antilles , are diorites ...
... magma before its solidification . The mineralizing agents in turn show their effect upon the magma in the nature of the minerals separated from it.Renard announces that the rocks of St. Thomas , in the Antilles , are diorites ...
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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.