A Guide to the Determination of Rocks: Being an Introduction to Lithology |
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Page 83
... carbon . The powder is soft to the touch . They fuse before the blow - pipe and sometimes exfoliate . The lower strata which touch the crystalline schists and some- times alternate with them , resemble the micaceous , or talcose schists ...
... carbon . The powder is soft to the touch . They fuse before the blow - pipe and sometimes exfoliate . The lower strata which touch the crystalline schists and some- times alternate with them , resemble the micaceous , or talcose schists ...
Page 85
... sulphates resulting from this decomposition , are used as fer- tilizers . When the carbon is in large proportions , Ampelite is used for black crayons . 88. Argillite ( Syn . Clay stone ) .- This ARGILLACEOUS SCHISTS AND SLATES . 85.
... sulphates resulting from this decomposition , are used as fer- tilizers . When the carbon is in large proportions , Ampelite is used for black crayons . 88. Argillite ( Syn . Clay stone ) .- This ARGILLACEOUS SCHISTS AND SLATES . 85.
Page 89
... carbon ( crystal fumée ) ; vio- let from Manganese ( Amethyst ) ; red or yellow from oxide of Iron ; and rose or greenish from other matters . It often has a greasy aspect ; and always a vitreous fracture . Fig . 25 . 98. Massive Quartz ...
... carbon ( crystal fumée ) ; vio- let from Manganese ( Amethyst ) ; red or yellow from oxide of Iron ; and rose or greenish from other matters . It often has a greasy aspect ; and always a vitreous fracture . Fig . 25 . 98. Massive Quartz ...
Page 91
... carbon- iferous ( Belgium ) . 106. Resinites . - Amorphous Silica of a gum - like structure , soluble in hydrofluoric acid and boiling alkaline solutions ; it may be fused with potash . Generally transparent ; sometimes opaque ...
... carbon- iferous ( Belgium ) . 106. Resinites . - Amorphous Silica of a gum - like structure , soluble in hydrofluoric acid and boiling alkaline solutions ; it may be fused with potash . Generally transparent ; sometimes opaque ...
Page 99
... Carbon . Compact Limestones . - With grains discernible only under high magnifying power . They have a fracture quite flat and dull ; sometimes earthy . Slightly porous . A slightly yellowish var- iety is employed as a lithographic ...
... Carbon . Compact Limestones . - With grains discernible only under high magnifying power . They have a fracture quite flat and dull ; sometimes earthy . Slightly porous . A slightly yellowish var- iety is employed as a lithographic ...
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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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