Geological Magazine, Volume 6

Henry Woodward
Cambridge University Press, 1869

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Página 472 - A great reform in geological speculation seems now to have become necessary." " It is quite certain that a great mistake has been made — that British popular geology at the present time is in direct opposition to the principles of Natural Philosophy.
Página 246 - Hopkins, may be supposed still to retain its liquid condition, and to be the seat of volcanic action, whether existing in isolated reservoirs or subterranean lakes; or whether, as suggested by Scrope, forming a continuous sheet surrounding the solid nucleus, whose existence is thus conciliated with the evident facts of a flexible crust, and of liquid ignited matters beneath. Hopkins, in the discussion of this question, insisted upon the...
Página 83 - MA Thoughts on Miracles. By the late EB PENNY, Esq. On the General Character of Geological Formations. By the late E. HOPKINS, Esq., CE 4. On the Past and Present Relations of Geological Science to the Sacred Scriptures. By the Rev.
Página 96 - He was elected a Fellow of the Geological Society of London in 1870, and in 1878 was created a CMG through the recommendation of Sir John Glover, then Governor of Newfoundland.
Página 250 - Two things become apparent from a study of the chemical nature of eruptive rocks : first, that their composition presents such variations as are irreconcilable with the simple origin generally assigned to them ; and, second, that it is similar to that of sedimentary rocks whose history and origin it is, in most cases, not difficult to trace. I have elsewhere pointed out how the natural operation of mechanical and chemical agencies tends to produce among sediments a separation into two classes, corresponding...
Página 251 - ... bases ; while in the masses of pinite or agalmatolite rock we have a similar aluminous silicate, in which lime and magnesia are wanting, and potash is the predominant alkali. In such sediments as these just enumerated we find the representatives of eruptive rocks like peridotite, phonolite, leucitophyre, and similar rocks, which are so many exceptions in the basic group of Bunsen.
Página 90 - ... HUXLEY showed that no conclusion could be drawn from the want of processes on the ribs or the position of the orbits as to the habits of the animal, and remarked that the processes in Sphenodon were not anchylosed to the ribs ; he considered it possible, but not probable, that the jaws had a horny covering. He stated that in using the term
Página 247 - ... strata will thus become crystallized by heat, and may eventually, with their included water, be raised to the melting point, by which process gases would be generated, and earthquakes and volcanic eruptions follow. At the same time the mechanical disturbance of the equilibrium of pressure, consequent upon a transfer of sediments, while the yielding surface reposes on matters partly liquified, will explain the movements of elevation and subsidence of the earth's crust Herschel was probably ignorant...
Página 59 - England, had given a clear statement of the results of his own original observations, and had declared that none of the human bones or stone implements met with by him in any of the caverns could be considered to be as old as the mammoth and other extinct quadrupeds. Opinions in harmony with this conclusion continued until very lately to be generally in vogue in England ; although about the time that Schmerling was exploring the Liege caves, the Rev. Mr. M'Enery...
Página 86 - ... with serpentine, and the middle branches with sulphide of iron, while the smallest branches were filled with carbonate of lime, of the same nature as the matrix. It was only under a favourable light that these smaller tubes were visible, as the calcite in them was of the same crystalline character as the surrounding network. This was conclusive evidence of the structure not arising from the mere infiltration of one chemical substance into another. Moreover this foreign matter could not penetrate...

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