A Guide to the Determination of Rocks: Being an Introduction to Lithology |
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Page 5
... Metallic Rocks , 109 XIV . Combustible Rocks , 114 PART THIRD . Method to be followed in practically determining Rocks , 117 PART FOURTH . - APPENDIX . Dichotomic Table for determining rock species , -143 Index , 163 INTRODUCTION . THE ...
... Metallic Rocks , 109 XIV . Combustible Rocks , 114 PART THIRD . Method to be followed in practically determining Rocks , 117 PART FOURTH . - APPENDIX . Dichotomic Table for determining rock species , -143 Index , 163 INTRODUCTION . THE ...
Page 13
... metallic streak left by the steel can be seen ; or if it is cut by the point , the fine powder which the cutting produces may be wiped away with the finger , after which the cut itself may be distinctly seen . A rock of group I may be ...
... metallic streak left by the steel can be seen ; or if it is cut by the point , the fine powder which the cutting produces may be wiped away with the finger , after which the cut itself may be distinctly seen . A rock of group I may be ...
Page 33
... metallic upon the cleavage - face . It is of a bright yellow , brown or olive - green . Not attacked by acids . Hypersthene . - Contains as much iron as magnesia . It is distinguished by a lively red - brown color with a coppery lustre ...
... metallic upon the cleavage - face . It is of a bright yellow , brown or olive - green . Not attacked by acids . Hypersthene . - Contains as much iron as magnesia . It is distinguished by a lively red - brown color with a coppery lustre ...
Page 58
... metallic Iron intimately mixed . Varieties ; common Basalt . B. with fragments of Peridot . Peridotite of Cordier . The rock contains an aggregate of polyhedric or rounded grains of a green or yellowish - green or blackish - colored ...
... metallic Iron intimately mixed . Varieties ; common Basalt . B. with fragments of Peridot . Peridotite of Cordier . The rock contains an aggregate of polyhedric or rounded grains of a green or yellowish - green or blackish - colored ...
Page 67
... metallic lustre . Accidental minerals : Olivine , Ouralite , brown or green Hornblende , Mica , Talc , Calc - spar , Epidote , Cubic Pyrites , Magnetic iron . 58. Variolite . This name has been given to this rock by reason of ...
... metallic lustre . Accidental minerals : Olivine , Ouralite , brown or green Hornblende , Mica , Talc , Calc - spar , Epidote , Cubic Pyrites , Magnetic iron . 58. Variolite . This name has been given to this rock by reason of ...
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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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