A Guide to the Determination of Rocks: Being an Introduction to Lithology |
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Page 19
... Hornblende by means of these colors . IV . I shall recommend , finally , for this kind of research , a process which has often served me with advantage , and which consists in the employment of a lamina of Selenite of sensible thickness ...
... Hornblende by means of these colors . IV . I shall recommend , finally , for this kind of research , a process which has often served me with advantage , and which consists in the employment of a lamina of Selenite of sensible thickness ...
Page 30
... Hornblende is a greenish or brownish gray . Hornblende presents itself quite frequently , in rocks , in fibrous crystals which have the appearance of wood - charcoal , but in which may be perceived the two cleavage - planes which have ...
... Hornblende is a greenish or brownish gray . Hornblende presents itself quite frequently , in rocks , in fibrous crystals which have the appearance of wood - charcoal , but in which may be perceived the two cleavage - planes which have ...
Page 31
... Hornblende . If a little melted tallow be smeared upon the faces of these crystals , it will , in cooling , exhibit ... Hornblende are easy to distinguish , when they are crystallized . In the granular varieties , Hornblende is always ...
... Hornblende . If a little melted tallow be smeared upon the faces of these crystals , it will , in cooling , exhibit ... Hornblende are easy to distinguish , when they are crystallized . In the granular varieties , Hornblende is always ...
Page 32
... Hornblende . If such laminæ be seen through a crystal of Iceland spar , Amphibole exhibits two images whose colors vary from yellow to brown , or green , M M Fig . 11 . or violet , according to the faces which are presented to the plate ...
... Hornblende . If such laminæ be seen through a crystal of Iceland spar , Amphibole exhibits two images whose colors vary from yellow to brown , or green , M M Fig . 11 . or violet , according to the faces which are presented to the plate ...
Page 38
... Hornblende ( syenite granite ) ; Tourmaline ( tourmaline granite ) ; Ferruginous Granite , in scales ; Cordierite ( cordierite granite ) ; Pinite , in prisms with numerous lateral faces , of a yellowish - gray , or green color ; Albite ...
... Hornblende ( syenite granite ) ; Tourmaline ( tourmaline granite ) ; Ferruginous Granite , in scales ; Cordierite ( cordierite granite ) ; Pinite , in prisms with numerous lateral faces , of a yellowish - gray , or green color ; Albite ...
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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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