Lectures on Geology: Being Outlines of the ScienceE. Bliss & E. White, 1825 - 358 páginas |
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Página xii
... Fracture - Hardness- Color - Frangibility - Lustre -- Trasparency- Specific gravity - Action of Acids LECTURE V. • • 126 Primary Rocks . Granite - Gneiss - Mica Slate- Ext -Argillite -- Serpentine -- Limestone - Quartz Rock - Chlorite ...
... Fracture - Hardness- Color - Frangibility - Lustre -- Trasparency- Specific gravity - Action of Acids LECTURE V. • • 126 Primary Rocks . Granite - Gneiss - Mica Slate- Ext -Argillite -- Serpentine -- Limestone - Quartz Rock - Chlorite ...
Página 71
... fractured and angular . In these conglomerates we usually notice peb- bles that are broken , and have their fragments near to them : but as such stones could not have been broken without violent force , their position clearly indicates ...
... fractured and angular . In these conglomerates we usually notice peb- bles that are broken , and have their fragments near to them : but as such stones could not have been broken without violent force , their position clearly indicates ...
Página 126
... Fracture -- Hardness - Color - Frangibility -Lustre - Transparency - Specific Gravity - Action of Acids . Having cursorily glanced at the present appear- ance of our globe , and at the changes now going forward , from various causes ...
... Fracture -- Hardness - Color - Frangibility -Lustre - Transparency - Specific Gravity - Action of Acids . Having cursorily glanced at the present appear- ance of our globe , and at the changes now going forward , from various causes ...
Página 132
... the centre . Cross courses are veins not being metalliferous intersecting metallic veins . Sometimes the body of a vein and the surround- ing strata seem to have been fractured , and part of it to have fallen down , leaving the edges 132.
... the centre . Cross courses are veins not being metalliferous intersecting metallic veins . Sometimes the body of a vein and the surround- ing strata seem to have been fractured , and part of it to have fallen down , leaving the edges 132.
Página 137
... fracture , at other times not till the matrix is in part worn away . They often intersect each other , exhibiting a reticulated surface , show- ing that in the interior of the rocks laminæ cross each other . Trap and granite are more ...
... fracture , at other times not till the matrix is in part worn away . They often intersect each other , exhibiting a reticulated surface , show- ing that in the interior of the rocks laminæ cross each other . Trap and granite are more ...
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Lectures on Geology: Being Outlines of the Science Jeremiah Van Rensselaer Sin vista previa disponible - 2016 |
Términos y frases comunes
Actynolite alluvial alternating ammonites amygdaloidal arenaceous argillaceous argillite augit basalt beautiful beds belemnites bitumen calcareous chalk chlorite chlorite schist clay slate coal coarse color columnar compact felspar composed compound conglomerates containing crater crystals deluge deposits distinct earth elevated epidote feet felspar Fibrous foliated formation fossils fracture fragments Geologists Geology gneiss grains granite granular green greenstone grey greywacke gypsum hornblende Humboldt indurated ingredients iron laminæ laminar lava lignite limestone marble marine marl mass mentioned mica mica slate micaceous schist mountains observed occasionally occur ocean oolite organic remains ostrea passes peat porphyry position primary rocks primitive prismatic pyrites quantity quartz quartz rock Quartz sand red sandstone sandstone Scaly schist schistose secondary rocks serpentine shale shells sienite siliceous simple sometimes spar species splintery stone strata structure substances surface SYNOPSIS talc tertiary texture theory tion transition trap usually vallies varies varieties vegitable veins volcanic
Pasajes populares
Página xii - And the earth brought forth grass, and herb yielding seed after his kind, and the tree yielding fruit, whose seed was in itself, after his kind: and God saw that it was good.
Página 78 - Nymphs lie With languid limbs in summer's sultry hours. Here too were living flowers Which, like a bud compacted, Their purple cups contracted, And now in open blossom spread, Stretch'd like green anthers many a seeking head.
Página 103 - Villages, and woods, and rocks, Fall flat before their sweep. The region round, Where myrtle walks and groves of golden fruit Rose fair ; where harvest...
Página 78 - And plants of fibres fine, as silkworm's thread; Yea, beautiful as Mermaid's golden hair Upon the waves dispread: Others that, like the broad banana growing, Rais'd their long wrinkled leaves of purple hue, Like streamers wide out-flowing.
Página 47 - When by thus comparing a number of cases, agreeing in some circumstances, but differing in others, and all attended •with the same result, a philosopher connects, as a general law of nature, the event with its physical cause, he is said to proceed according to the method of induction.
Página 78 - With languid limbs in summer's sultry hours. Here, too, were living flowers, Which, like a bud compacted, Their purple cups contracted ; And now in open blossom spread, Stretch'd, like green anthers, many a seeking head.
Página 45 - ... by the water, in consequence either of these lands sinking down below the level of the sea, or of the sea being raised above the level of the lands. The particular portions of the earth also which the sea has abandoned by its last retreat, had been laid dry once before, and had at that time produced quadrupeds, birds, plants, and all kinds of terrestrial productions; it had then been inundated by the sea, which has since retired from it and left it to be occupied by its own proper inhabitants.