A Guide to the Determination of Rocks: Being an Introduction to Lithology |
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Page 13
... blow - pipe . I have frequently , also , employed the character of hardness . When we wish to determine a rock , we consult first the third part . The first examination suffices to make known the texture , whether globuliferous ...
... blow - pipe . I have frequently , also , employed the character of hardness . When we wish to determine a rock , we consult first the third part . The first examination suffices to make known the texture , whether globuliferous ...
Page 15
... blow - pipe magnet , etc. M. Ad . Brongniart has examined directly with the micro- scope , the thin laminæ cut from petrified wood . INTRODUCTION . 15.
... blow - pipe magnet , etc. M. Ad . Brongniart has examined directly with the micro- scope , the thin laminæ cut from petrified wood . INTRODUCTION . 15.
Page 23
... blow - pipe . In order to observe this latter characteristic , it is necessary to break it into as small fragments as possible ; then choose from among them those which have the sharpest edges or points , and place one in the platinum ...
... blow - pipe . In order to observe this latter characteristic , it is necessary to break it into as small fragments as possible ; then choose from among them those which have the sharpest edges or points , and place one in the platinum ...
Page 24
... blow - pipe , Oligoclase fuses more easily than Albite to a colorless glass , coloring the flame yellow . It is readily attacked by acids . Oligoclase contains about 80 % of Silica . Andesine ( Oligoclase , very rich in Lime ) ...
... blow - pipe , Oligoclase fuses more easily than Albite to a colorless glass , coloring the flame yellow . It is readily attacked by acids . Oligoclase contains about 80 % of Silica . Andesine ( Oligoclase , very rich in Lime ) ...
Page 25
... blow - pipe and completely decomposed by hydrochloric acid , with separation of Silica . MINERALS ALLIED TO THE FELDSPARS . 1. Nepheline ( Aluminum - sodium - potassium - calcium , Sil- icates ) . Hexagonal prism , some- - times ...
... blow - pipe and completely decomposed by hydrochloric acid , with separation of Silica . MINERALS ALLIED TO THE FELDSPARS . 1. Nepheline ( Aluminum - sodium - potassium - calcium , Sil- icates ) . Hexagonal prism , some- - times ...
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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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