"Siliceous" Quotes from Famous Books
 ... exception; for on the whole, they certainly remain constant. The only example which goes to prove such an evolution of species as taking place to-day—viz: the natural history of sponges—seems not to have this bearing. The transitions of form, proven by O. Schmidt in the siliceous sponges and by Haeckel in the chalk-sponges, seem to show, not the genetic coming forth of a new species out of another, and especially not the evolution of a higher species out of a lower, but rather the uncertainty ...
— The Theories of Darwin and Their Relation to Philosophy, Religion, and Morality • Rudolf Schmid
... northern side of the Colorado, being from one or two inches in diameter, and composed chiefly of rather dark-tinted porphyries. Amongst them I here first noticed a variety often to be referred to, namely, a peculiar gallstone-yellow siliceous porphyry, frequently, but not invariably, containing grains of quartz. The pebbles are embedded in a white, gritty, calcareous matrix, very like mortar, sometimes merely coating with a whitewash the separate stones, and sometimes forming the greater part of the mass. In one place I saw ...
— South American Geology - also: - Title: Geological Observations On South America • Charles Darwin
... the lime proves potent to cure in the offspring what, through the parental surfeit, was entailed as [xvii] a heritage of disease. Just in the same way the mineral waters of Missisquoi, and Bethesda, in America, through containing siliceous qualities so sublimated as almost to defy the analyst, are effective to cure cancer, ...
— Herbal Simples Approved for Modern Uses of Cure • William Thomas Fernie
... gauze of the vane at the mast-head. Mr. Lyell has also given me four packets of dust which fell on a vessel a few hundred miles northward of these islands. Professor Ehrenberg [3] finds that this dust consists in great part of infusoria with siliceous shields, and of the siliceous tissue of plants. In five little packets which I sent him, he has ascertained no less than sixty-seven different organic forms! The infusoria, with the exception of two marine species, are all inhabitants ...
— The Voyage of the Beagle • Charles Darwin
... through by the granite) clay-slate. In the upper parts, the sandstone begins to alternate with gypsum, till at last we have this substance of a stupendous thickness. I really think the formation is in some places (it varies much) nearly 2,000 feet thick, it occurs often with a green (epidote?) siliceous sandstone and snow-white marble; it resembles that found in the Alps in containing large concretions of a crystalline marble of a blackish grey colour. The upper beds which form some of the higher pinnacles consist of layers of snow-white gypsum and red compact ...
— More Letters of Charles Darwin - Volume I (of II) • Charles Darwin
... forms the eastern border of the valley of the Jordan, and descending in a S.W. direction along the windings of a Wady, we arrived at a large encampment of Bedouins, at the end of ten hours and a half from our setting out in the morning. The upper part of the mountains consists entirely of siliceous rock. We passed on the road several spots where the Bedouins ...
— Travels in Syria and the Holy Land • John Burckhardt
... it could assume according to the season and the hour, as the colour of its complexion varied. "The whole effect under a clear sky is silvery grey, and if the sun lights it up it turns pale golden yellow; seen from near, its skin is like a nibbled biscuit, a siliceous limestone eaten into holes; at other times, when the sun is setting, it turns crimson and appears like some vast and exquisite shrine, all rose colour and green; and in the twilight it is blue, and seems ...
— The Cathedral • Joris-Karl Huysmans
... Sup. page 30). The summit of Crystal Head is of flat tabular form; and the sides, which are both steep and rugged, are covered with stunted trees and high grass, now quite dry: the geology of this part is principally of siliceous sandstone; and on the beach we found large detached water-worn masses of the same rock, incrusted with quartz and epidote in ...
— Narrative of a Survey of the Intertropical and Western Coasts of Australia - Performed between the years 1818 and 1822 • Phillip Parker King
... cement. This may be calcareous, consisting of soluble carbonate of lime. In brown sandstones the cement is commonly ferruginous,—hydrated iron oxide, or iron rust, forming the bond, somewhat as in the case of iron nails which have rusted together. The strongest and most lasting cement is siliceous, and sand rocks whose grains are closely cemented by silica, the chemical substance of which quartz is ...
— The Elements of Geology • William Harmon Norton
... was informed by a fellow-passenger of gentlemanly bearing, who resided in the vicinity, that it was a dissipated place, and gambling the chief occupation of its inhabitants. The locality has been remarkable for landslips, owing to the siliceous nature of the soil; I saw traces of a fearful catastrophe of the kind which had, some time before, buried or destroyed many of the houses and their occupants, the enormous mass having also sunk several steam-boats and other vessels ...
— An Englishman's Travels in America - His Observations Of Life And Manners In The Free And Slave States • John Benwell
... powerful explosive substance, intensely local in its action; formed by impregnating a porous siliceous earth or other substance with some ...
— The Nuttall Encyclopaedia - Being a Concise and Comprehensive Dictionary of General Knowledge • Edited by Rev. James Wood |
