Proceedings of the Geologists' Association, Band 4

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Geologists' Association, London, 1876
 

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Seite 104 - Globigerince of the chalk differed from those of the existing species. But if this be true, there is no escaping the conclusion that the chalk itself is the dried mud of an ancient deep sea. In working over the soundings collected by Captain Dayman, I was surprised to find that many of what I have called the
Seite 504 - Bulletin of the United States Geological and Geographical Survey of the Territories. Vol. Ill, Nos. 1 and 2. Bulletin No. 1 of the United States Entomological Commission, " Destruction of the Young or unfledged Locusts.
Seite 102 - The nummulitic formation, with its characteristic fossils, plays a far more conspicuous part than any other tertiary group in the solid framework of the earth's crust, whether in Europe, Asia, or Africa. It often attains a thickness of many thousand feet, and extends from the Alps to the Carpathians, and is in full force in the north of Africa, as, for example, in Algeria and Morocco.
Seite 482 - Memoirs of the Geological Survey of Great Britain,
Seite 246 - In his paper on the Loess and Quaternary beds of the North of France and South-east of England, Mr. Prestwich expressed an opinion that the break in the land between France and England was not the result of the last geological change, but that the channel existed at the period of the formation of the Low-level gravels of the Somme and Thames Valleys, and probably at that of the High-level gravels. During a recent visit to the Sangatte Raised Beach, the author recognized fragments of chert in the...
Seite 103 - ... ^~But the slice of chalk presents a totally different appearance when placed under the microscope. The general mass of it is made up of very minute granules ; but, imbedded in this matrix, are innumerable bodies, some smaller and some larger, but, on a rough average, not more than a hundredth of an inch in diameter, having a welldefined shape and structure. A cubic inch of some specimens of chalk may contain hundreds 'of thousands of these bodies, compacted together with incalculable millions...
Seite 176 - Association, that the foundation of the whole of geological science — that is, the interpretation of the phenomena presented to us in the study of the earth's crust — must be based upon the study of the changes at present going on upon the surface of the earth, of course including the depths of the sea.
Seite 525 - On the ancient Flint Implements of Yorkshire, and the Modern Fabrication of similar specimens,
Seite 548 - HILL, on the north side of the turnpike road leading from Faringdon to Highworth, and within a few yards of it, is a camp of a circular form, 200 yards in diameter, with a ditch twenty yards wide. About nine years ago, in levelling the north rampart, human bones and coals were found ; and human bones are found every year in digging for peat in the swampy ground about one mile south of the hill. Leland, in his Itinerary...
Seite 21 - Another class of phenomena, usually ascribed to a gradual sinking of the earth's crust, but which might also be produced by the return of the sea to the level it stood at before the Glacial period, is that connected with the growth of coral islands. Darwin's celebrated essay on their formation first proved that they were due to the gradual deepening of the water. Dana, closely following Darwin in his theory, estimates that this deepening of the ocean bed from which the coral islands rise has been...

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