A Guide to the Determination of Rocks: Being an Introduction to Lithology |
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Page 7
... surface of the globe , the air which surrounds it in all directions , the gases and vapors which escape from its depths , merit doubtless the name of elementary parts of the globe ; but the determination of these elements of our planet ...
... surface of the globe , the air which surrounds it in all directions , the gases and vapors which escape from its depths , merit doubtless the name of elementary parts of the globe ; but the determination of these elements of our planet ...
Page 8
... surface was suffi- ciently lowered , the water condensed from the atmosphere , and charged with vapors or gases of different kinds , commenced its chemical role as a solvent , and its mechanical rôle as a motor , transperting to points ...
... surface was suffi- ciently lowered , the water condensed from the atmosphere , and charged with vapors or gases of different kinds , commenced its chemical role as a solvent , and its mechanical rôle as a motor , transperting to points ...
Page 9
... surface - water which penetrates and flows through interstices or crevices of the superficial parts , and , moreover , the emanations from greater depths — all these influ- ences have aided , more or less , to modify the mineralogical ...
... surface - water which penetrates and flows through interstices or crevices of the superficial parts , and , moreover , the emanations from greater depths — all these influ- ences have aided , more or less , to modify the mineralogical ...
Page 10
... surface that it is necessary to follow these transitions , so numerous , from one rock to another very differ- ent in texture . I have taken the care to note all these changes , so impor- tant for geological theories . The principal ...
... surface that it is necessary to follow these transitions , so numerous , from one rock to another very differ- ent in texture . I have taken the care to note all these changes , so impor- tant for geological theories . The principal ...
Page 14
... surface ; splintery frac- ture presents a surface like that of broken wood ; platy fracture exhibits plane or nearly plane surfaces ; sparry fracture exhibits surfaces made up of geometrical planes , as in the surfaces of crystals ...
... surface ; splintery frac- ture presents a surface like that of broken wood ; platy fracture exhibits plane or nearly plane surfaces ; sparry fracture exhibits surfaces made up of geometrical planes , as in the surfaces of crystals ...
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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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