Igneous rocks; composition, texture and classification, description and occurranceРипол Классик, 1909 - History |
Contents
| 1 | |
| 23 | |
anolrms or Pursics AND Cnsmsrnr APPLICABLE TO ROCK Mantras | 74 |
CHAPTER IV | 120 |
Saunanon or Sonsrancns Inou SOLUTION | 154 |
CHAPTER VI | 161 |
or Iossoos Rocxs | 182 |
Shapes of Specific Minerals Quartz Feldspars Nephelite | 207 |
CHAPTER VII | 251 |
Intrusive Bodies Dikes and Veins Sandstone Dikes Stocks | 309 |
PART II | 334 |
CHAPTER II | 347 |
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Common terms and phrases
albite alkalies aluminium amphibole analyses andesine anorthite aphanitic augite basalt biotite calcium cerium character chemical composition chiefly classification components compounds concentration constituents cooling crystals definite diagram difierent diopside dissolved equant eruption eutectic fabric feldspar feldspathoids ferromagnesian first fissures flow fluorine gases Geol glass granite pegmatite granular groundmass heat hornblende hydrogen igneous magmas igneous rocks intrusive ions isomorphous Jour kinds lava less leucite lime-soda-feldspar liquid magma magnesium magnesium and iron magnetite mass melting point metasilicate mica mixture molecular molecules nephelite nephelite-syenite notable amounts Occurs in granite olivine orthoclase orthosilicate oxides pegmatite phenocrysts polysilicate porphyritic portion potash-feldspar potassium present pressure prismoid proportions pyrogenetic minerals pyroxene quartz rare rock magmas salts saturation separation silicic acid small amounts sodalite sodium solid solidified solution spheroidal spherulites substance sufficient supersaturation surface syenite tabular take place temperature texture tion U. S. Geological Survey vapor viscous volcanic