A Guide to the Determination of Rocks: Being an Introduction to Lithology |
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Accessory Accidental acid appearance argillaceous Army aspect attacked Augite Basalts base becomes blow-pipe Breccia bright brown called carbon cement character Chlorite clay cleavage Cloth color compact composed contains crystalline crystals deep density deposits distinguished earthy easily edges Edition effervescence elements enamel Engineers Epidote exhibits faces Feldspar fibrous flame fracture fragments fuses fusible Garnet gives glass globule Gneiss grains granite granular gray grayish greasy green greenish hardness heated hexagonal Hornblende Illustrated infusible insoluble Iron laminæ layers less Lime Limestone lustre Magnesia magnetic masses Melaphyres metallic Mica Military mineral mixed Naval Navy nearly numerous Oligoclase Orthoclase oxide parallel paste Phonolite plates Porphyry powder PRACTICAL present prisms proportion Pyrites Quartz rock sandstone scales Schist schistose Silica slates slightly soluble solution sometimes steel structure sulphuric surface Talc texture Trachytes TREATISE tube United varies varieties vitreous yellow yields
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