A Guide to the Determination of Rocks: Being an Introduction to Lithology |
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Page 7
... composed of crystalline elements disposed in their distinct layers , are regarded as being among those which resulted from the slow cooling of the incandescent globe . Many geologists add also certain fine - grained granites . Rocks of ...
... composed of crystalline elements disposed in their distinct layers , are regarded as being among those which resulted from the slow cooling of the incandescent globe . Many geologists add also certain fine - grained granites . Rocks of ...
Page 11
... composed of elements belonging to the same species ; those compound , which are composed of elements of different species . Certain elements always occur in the rock ( essential ele- ments ) . Others appear only accidentally . A great ...
... composed of elements belonging to the same species ; those compound , which are composed of elements of different species . Certain elements always occur in the rock ( essential ele- ments ) . Others appear only accidentally . A great ...
Page 12
Being an Introduction to Lithology Édouard Jannettaz George Washington Plympton. if it were composed of Feldspar and Quartz , and contained no Mica . Sometimes , nevertheless , the Pegmatites admit of lam- inæ and large scales of Mica ...
Being an Introduction to Lithology Édouard Jannettaz George Washington Plympton. if it were composed of Feldspar and Quartz , and contained no Mica . Sometimes , nevertheless , the Pegmatites admit of lam- inæ and large scales of Mica ...
Page 13
... composed of a paste of indistinct elements and crystals ; 7. Complex rocks , formed of discernible elements . 8. Incoherent rocks , composed of isolated elements . Each of these paragraphs is divided into groups , I , II , III , etc ...
... composed of a paste of indistinct elements and crystals ; 7. Complex rocks , formed of discernible elements . 8. Incoherent rocks , composed of isolated elements . Each of these paragraphs is divided into groups , I , II , III , etc ...
Page 42
... composed principally of Feldspar , Mica , and Quartz . It is distinguished from Granite by its schis- toide texture . Quartz , quite difficult to distinguish in some varie- ties , is , nevertheless , found in small grains , grayish in ...
... composed principally of Feldspar , Mica , and Quartz . It is distinguished from Granite by its schis- toide texture . Quartz , quite difficult to distinguish in some varie- ties , is , nevertheless , found in small grains , grayish in ...
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Common terms and phrases
Accessory elements Accidental minerals Alumina Amphibole argillaceous attacked by acids Augite Basalts blackish blow-pipe Breccia brown Calc-spar Calcite Calcium carbon cavities cement Chlorite clay cleavage closed tube Cloth colorless compact conchoidal fracture contains crystalline crystals Delesse density Diorite Dolomite earthy easily Edition effervescence enamel Engineers Epidote Eurite exhibits Feldspar fibrous fragments fuses fusible Garnet globule globuliferous Gneiss grains granite granular gray grayish greasy lustre greenish hardness heated hexagonal Hornblende hydrochloric acid Illustrated Infantry infusible insoluble Labradorite laminæ layers less Lime Limestone Magnesia magnetic Magnetite Marl masses Melaphyres Mica Mica Schist Military Naval Oligoclase Oolitic Ordnance Orthoclase oxide of Iron paste pearly Phonolite plates porous Porphyry powder prisms Pumice Pyrites Pyroxene Quartz reddish rhombic base rock sandstone Schist schistose scoriaceous Silica slates sometimes steel point sulphuric acid Talc texture Tourmaline Trachytes TREATISE U. S. Army U. S. Navy varieties vitreous yellow yellowish yields
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