The Geology of England and Wales: A Concise Account of the Lithological Characters, Leading Fossils, and Economic Products of the Rocks; with Notes on the Physical Features of the CountryLongmans, Green and Company, 1876 - 476 Seiten |
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Ammonites attain a thickness Bagshot Beds bands beds Boulder breccia brickearth calcareous called Cambrian carbonate Carboniferous Limestone Chalk Chillesford clayey cliffs coal Coal-field Coal-measures coast colour conglomerate considered consists containing Coral Rag denudation deposits Devon Devonian district divisions Dorsetshire Drift England and Wales escarpments estuarine feet in thickness Flags flints Forest formation formed fossils Fuller's Earth Gault geological geologists Glacial granite gravel grey Hill igneous rocks Inferior Oolite lime Lingula lithological London Clay Lower Greensand Lower Lias Magnesian marine Marl Mendip Mendip Hills Millstone Grit mineral Mollusca Murchison nodules North Northampton Sand occur Old Red Sandstone Oolite Ostrea Oxford Clay Palæozoic pebbles Permian Phillips places portion Prof quarried quartz Ramsay Red Marl Rhætic rivers sand sandy seams Sedgwick shales shells siliceous Silurian slates slaty Somersetshire sometimes South species stone strata surface term thin tract unconformably Upper Greensand Vale valleys Wealden Wenlock Yorkshire
Beliebte Passagen
Seite 448 - FREDERICK M°CoY, FGS One vol., Royal 410. Plates, /i. is. A CATALOGUE OF THE COLLECTION OF CAMBRIAN AND SILURIAN FOSSILS contained in the Geological Museum of the University of Cambridge, by JW SALTER, FGS With a Portrait of PROFESSOR SEDGWICK.
Seite 474 - THIS is really a handy book. A concise account of all known minerals is given in alphabetical order, and references are added to the cases in which specimens may be found in the British Museum and the Museum of Practical Geology. There is also a useful introduction on the characters, properties, and chemical composition of minerals.
Seite 428 - Though we cannot yet make out clearly the relation of man to the Glacial period, or explain the gap between Palaeolithic and Neolithic deposits, this we do know — that man lived in this country and throughout Western Europe with the lion and hairy elephant, the hyaena and woolly rhinoceros. He was probably more or less nomadic, following the urus and the elk, and shifting from place to place as they migrated with the seasons.
Seite 359 - ... in a horizontal or nearly horizontal direction, following the sweep of the hillside whether curved or straight. The boundary line between these several strips may have been originally only a mathematical one, connecting, say, two mere-stones, and yet a bank will soon have been formed along it. For each upper cultivator will naturally have taken care not to allow the soil of his strip to descend to fertilize his neighbour's below. He would draw the lower limit of his strip by a reversed furrow,...
Seite 111 - The boundary between them may be roughly marked off by a line running from the mouth of the Tees to the mouth of the Exe.
Seite 178 - Earth, a sandy clay, which is described by Mr. Bristow as usually of a greenish-brown or greenish-grey colour, sometimes blue. It is opaque, soft, dull, with a greasy feel, and an earthy fracture. It yields to the nail, and affords a shining streak. It scarcely adheres to the tongue ; becomes translucent when placed in water, and falls into a pulpy impalpable powder, without forming a paste with it.
Seite 296 - Upward of 200,000 years ago the earth — as we know from the calculations of astronomers — was so placed in regard to the sun that a series of physical changes was induced which eventually resulted in conferring upon our hemisphere a most intensely severe climate. All northern Europe and northern America disappeared beneath a thick crust of ice and snow, and the glaciers of such regions as Switzerland assumed gigantic proportions.
Seite 280 - ... extending from the river Aide on the north, to the southern extremity of the deposit in Essex. Of these four stages, the 4th is the most constant and important, the 1st, 2nd, and 3rd being frequently either concealed by, or destroyed during the formation of, the succeeding stages. At Walton-on-the-Naze alone do any of the four lower stages contain evidence of being a subaqueous deposit; there the 1st stage is so, but it is covered by two reef stages, and these again by the 5th stage. The 5th...
Seite 379 - ... lead, and many others ; a slight trace of copper in the Bath waters being exceptional. Nevertheless, there is a strong presumption that there exists some relationship between the action of thermal waters and the filling of rents with metallic ores. The component elements of these ores may, in the first instance, rise from great depths in a state of sublimation or of solution in intensely heated water, and may then be precipitated on the walls of a fissure as soon as the ascending vapors or fluids...