A Guide to the Determination of Rocks: Being an Introduction to Lithology |
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Page 14
... yields unequal surface ; conchoidal fracture produces a curved or shell - like surface ; splintery frac- ture presents a surface like that of broken wood ; platy fracture exhibits plane or nearly plane surfaces ; sparry fracture ...
... yields unequal surface ; conchoidal fracture produces a curved or shell - like surface ; splintery frac- ture presents a surface like that of broken wood ; platy fracture exhibits plane or nearly plane surfaces ; sparry fracture ...
Page 28
... Yields water in the closed tube . Decomposed by concentrated sul- phuric acid , also in boiling hydrochloric . Before the blow - pipe it is more or less easily fused to a black enamel , which is mag- netic for the reason that it ...
... Yields water in the closed tube . Decomposed by concentrated sul- phuric acid , also in boiling hydrochloric . Before the blow - pipe it is more or less easily fused to a black enamel , which is mag- netic for the reason that it ...
Page 29
... yields an unctuous powder ; exhibits the flexibility and want of elasticity which distinguishes Talc . The Pagodite ... yield a little water in the closed tube ; not attacked by acids . AMPHIBOLES . All the species of this group ...
... yields an unctuous powder ; exhibits the flexibility and want of elasticity which distinguishes Talc . The Pagodite ... yield a little water in the closed tube ; not attacked by acids . AMPHIBOLES . All the species of this group ...
Page 51
... yields water . Accessory elements : Hornblende , in black , acicular prisms ; Sphene , yellow or reddish ; Mica , brown or silver - white ; Zeolites . The density varies from 2.5 to 2.6 . Varieties : Phonolite proper ( schistoide ) ...
... yields water . Accessory elements : Hornblende , in black , acicular prisms ; Sphene , yellow or reddish ; Mica , brown or silver - white ; Zeolites . The density varies from 2.5 to 2.6 . Varieties : Phonolite proper ( schistoide ) ...
Page 55
... yields water often containing ammonia , chlorine and sulphuric acid . It fuses with difficulty to a grayish enamel . It forms the bed of the river Rhine , where it is used as a hy- draulic cement . According to Cordier , the paste of ...
... yields water often containing ammonia , chlorine and sulphuric acid . It fuses with difficulty to a grayish enamel . It forms the bed of the river Rhine , where it is used as a hy- draulic cement . According to Cordier , the paste 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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