Geological Magazine, Volume 3Henry Woodward Cambridge University Press, 1866 |
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Página 8
... consist of felspar and claystone porphyries ( some like those of Davar Island ) indurated grits and sandstones , white and coloured quartz , and more rarely granite , but ( as Pro- fessor Nicol has observed ) there are no specimens of ...
... consist of felspar and claystone porphyries ( some like those of Davar Island ) indurated grits and sandstones , white and coloured quartz , and more rarely granite , but ( as Pro- fessor Nicol has observed ) there are no specimens of ...
Página 14
... consisting in its lowest layers of sandy - clay which , where the fossils are most abun- dant , has become consolidated into hard , nodular concretions of shell- rock . A stiff brown or bluish clay ( the " Lobster - clay " of Ather ...
... consisting in its lowest layers of sandy - clay which , where the fossils are most abun- dant , has become consolidated into hard , nodular concretions of shell- rock . A stiff brown or bluish clay ( the " Lobster - clay " of Ather ...
Página 15
... consisting almost entirely of light - coloured sands with irregular concretions of siliceous sandstone . The absence of ferruginous sands below the Gault , which form so conspicuous a feature at Redhill and Guildford , being specially ...
... consisting almost entirely of light - coloured sands with irregular concretions of siliceous sandstone . The absence of ferruginous sands below the Gault , which form so conspicuous a feature at Redhill and Guildford , being specially ...
Página 16
... consisting of sands of various colours , frequently yellowish or ferruginous , like the upper beds of the Lower Green- sand , of Surrey . Turning now to the section it will be seen that the range of the Folkestone - beds has been ...
... consisting of sands of various colours , frequently yellowish or ferruginous , like the upper beds of the Lower Green- sand , of Surrey . Turning now to the section it will be seen that the range of the Folkestone - beds has been ...
Página 25
... consisting of decomposed igneous rock , and in part of the decomposed previously altered sedimentary rocks in contact with the same ; believing that the present Rowley Hills had been exposed and laid bare , by denudation of the strata ...
... consisting of decomposed igneous rock , and in part of the decomposed previously altered sedimentary rocks in contact with the same ; believing that the present Rowley Hills had been exposed and laid bare , by denudation of the strata ...
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Palavras e frases frequentes
action ancient appear beds bones Boulder-clay Brachiopoda Carboniferous caves Chalk character clay cliffs coal coast cone containing Crag Cretaceous Crustacea denudation deposits described Devonian district drift elevation escarpment evidence excavated exhibited existence fault fauna feet flint formation fossils genus Geol GEOLOGICAL MAGAZINE Geological Society Geological Survey geologists Glacial gneiss gorge granite Graptolites Greensand hills igneous igneous rocks land Limestone London clay Lough Corrib lower marine mass metamorphic miles mineral Miocene mountain neighbourhood observed occur Old Red Sandstone Oolite operculum origin paper period Permian Plate Pliocene portion present probably Professor quartz R. I. Murchison raised beach Red Sandstone remains remarkable ridge river rocks sand scale seen shales shells side Silurian slope species specimens stone strata stream striæ structure surface terraces Tertiary Thames gravel thickness tion traces Upper valley volcanic Weald
Passagens conhecidas
Página 336 - THE GEOLOGY OF PENNSYLVANIA: A Government Survey; with a General View of the Geology of the United States, Essays on the Coal Formation and its Fossils, and a Description of the Coal-Fields of North America and Great Britain.
Página 67 - It affords no presumption against the reality of this progress, that, in respect of man, it is too slow to be immediately perceived. The utmost portion of it to which our experience can extend, is evanescent, in comparison with the whole, and must be regarded as the momentary increment of a vast progression, circumscribed by no other limits than the duration of the world. Time performs the office of integrating the infinitesimal parts of which this progression is made up; it collects them...
Página 198 - The leading idea which is present in all our researches, and which accompanies every fresh observation, the sound which to the ear of the student of Nature seems continually echoed from every part of her works is — Time...
Página 528 - In 1825 he was elected a Fellow of the Geological Society of London, and in the same year he read his first paper on "The Geological Formation of the North-west extremity of Sussex, and the adjoining parts of Hants and Surrey...
Página 182 - ... shorter duration than those of the lower parts of the animal kingdom, and thus carry with them the greatest weight in questions of geological time ; still it appears to me that there is nothing in the fossil contents of the Devonian beds which is conclusive against the idea of their occupying a position between the top of the Old Red Sandstone and the base of the Coalmeasures. I have also just been indebted to Professor W. King, of Galway, for the sight of a paper, by Professor James Hall, of...
Página 267 - Rutland limestone is not bedded, at least not evidently, it checks and cracks in all directions on exposure to the weather (see figure 14). The rock is, nevertheless, very hard, and erosion proceeds but slowly. Under the lens very large ooliths, or pisoliths, appear, from a quarter of an inch to half an inch in diameter, but no traces of organic remains were discovered. The total thickness of these rocks, as exposed at Rutland bridge, is about twenty feet. SAINT LOUIS LIMESTONE. Exposures of rock...
Página 176 - Of singular merit for its clearness and trustworthy character."— Standard. GEOLOGY FOR GENERAL READERS. A Series of Popular Sketches in Geology and Palaeontology. By the Same. Third Edition, enlarged. 6s. " This is one of the best of Mr Page's many good books. It is written in a flowing popular style. Without illustration or any extraneous aid, the narrative must prove attractive to any intelligent reader."— Geological Magazine.
Página 140 - Columba,' to preach the Word of God to the provinces of the northern Picts...
Página 81 - Dr. Carpenter then combated the opinion advanced by Professor King and Dr. Rowney, in the preceding paper, and stated that even if the remarkable dendritic passages hollowed out in the calcareous layers, and the arrangements of the minerals in the Eozoic limestone, could be accounted for by inorganic agencies, there still remains the...
Página 122 - ... producing a bituminous matter instead of coal or lignite. This operation is not attributable to heat, nor of the nature of a distillation, but is due to chemical reactions at the ordinary temperature, and under the normal conditions of climate.