An Introduction to Geology: Comprising the Elements of the Science in Its Present Advanced State, and All the Recent Discoveries, with an Outline of the Geology of England and WalesLongman, Rees, Orme, Brown, and Green, 1828 - 540 |
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Strona xvi
... Characters of simple Minerals compo- sing Rocks . - Explanation of the Terms employed in describing the internal Structure of Rocks , and the external Structure of Mountain Masses . Page 46 CHAPTER IV . ON STRATIFICATION , AND THE ...
... Characters of simple Minerals compo- sing Rocks . - Explanation of the Terms employed in describing the internal Structure of Rocks , and the external Structure of Mountain Masses . Page 46 CHAPTER IV . ON STRATIFICATION , AND THE ...
Strona xvii
... Character and Classification of Transition Rocks . - Slate , the Clay- slate of Werner . - Roof Slate , its Cleavage not the Effect of Stratification , but of Crystallization . - Talcous Slate . - Whet- stone Slate . - Flinty Slate ...
... Character and Classification of Transition Rocks . - Slate , the Clay- slate of Werner . - Roof Slate , its Cleavage not the Effect of Stratification , but of Crystallization . - Talcous Slate . - Whet- stone Slate . - Flinty Slate ...
Strona xix
... characters which distinguish Rocks of this Class . - Large Saurian Animals . - Magnesian Limestone or Dolomite . - On the occurrence of Magnesian Earth in Calcareous Rocks . - Compact and cellular Magnesian Limestone . English Strata of ...
... characters which distinguish Rocks of this Class . - Large Saurian Animals . - Magnesian Limestone or Dolomite . - On the occurrence of Magnesian Earth in Calcareous Rocks . - Compact and cellular Magnesian Limestone . English Strata of ...
Strona 10
... characters of each class ; and in order to direct the attention of the reader more forcibly to the subject , I shall trace on an outline map the principal situations in our own island , where rocks of each class occur , except the ...
... characters of each class ; and in order to direct the attention of the reader more forcibly to the subject , I shall trace on an outline map the principal situations in our own island , where rocks of each class occur , except the ...
Strona 12
... character belonging to both . The rocks of the primary and transition class are the principal repositories of metallic ores , but in Europe they contain few saline or inflammable minerals * . In South America , according to Humboldt ...
... character belonging to both . The rocks of the primary and transition class are the principal repositories of metallic ores , but in Europe they contain few saline or inflammable minerals * . In South America , according to Humboldt ...
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An Introduction to Geology: Comprising the Elements of the Science in Its ... Robert Bakewell Podgląd niedostępny - 2015 |
Kluczowe wyrazy i wyrażenia
Alps ancient animals appears augite Auvergne basalt bed of coal beds of limestone bones calcareous called carbon caverns chalk Charnwood Forest coal strata coal-field colour composed contain covered crater crystals deposited Derbyshire distance districts dykes earth elevated England eruptions extends feet felspar fissures formed fossil fragments frequently freshwater geologists geology globe gneiss granite greywacke gypsum hills hornblende hundred imbedded intermixed iron island lakes lava lias lime London clay magnesian limestone marine marle mass metallic mica mica-slate miles mineral moun mountains nearly numerous observed occur ocean oolite organic remains Plate porphyry present primary rocks quadrupeds quartz range red marle red sandstone rise rivers rock-salt salt sand shale shells side sienite siliceous situations slate rocks sometimes species stone stratum substances subterranean summit surface tain tertiary strata thick beds tion toadstone trachyte transition limestone transition rocks tufa unconformable upper secondary strata valleys vegetable veins volcanic Yorkshire
Popularne fragmenty
Strona 326 - scenes of ruin every where appeared around me : but my attention was quickly turned from more remote to contiguous danger, by a deep rumbling sound, which every moment grew louder. The place where we stood shook most dreadfully. After some time, the violent paroxysm ceasing, I stood up, and turning my eyes to look for Euphemia, saw only a frightful black cloud. We waited till it had passed away, when nothing but a dismal and putrid lake was to be seen where the city once stood.
Strona x - In 1778 Mr. Whitehurst published his "Inquiry into the original State and Formation of the Earth ;" of which a second edition appeared in 1786, considerably enlarged and improved; and a third in 1792.' This was the labour of many years ; and the numerous investigations necessary to its completion were in themselves also of so untoward a nature as at times, though he was naturally of a strong constitution...
Strona 336 - This eruption extended perceptible evidences of its existence over the whole of the Molucca islands, over Java, a considerable portion of Celebes, Sumatra, and Borneo, to a circumference of a thousand statute miles from its centre, by tremulous motions, and the report of explosions; while within the range of its more immediate activity, embracing a space of three hundred miles around it, it produced the most astonishing effects, and excited the most alarming apprehensions.
Strona 326 - Stromboli, though at sixty miles distance, belching forth flames in an unusual manner, and with a noise which I could distinctly hear. But my attention was quickly turned from more remote to contiguous danger.
Strona 340 - Auvergne or Italy." Submarine volcanoes are preceded by a violent boiling and agitation of the water, and by the discharge of volumes of gas and vapour, which take fire and roll in sheets of flame over the surface of the waves. Masses of rock are darted through the water with great violence, and accumulate till they form new islands. Sometimes the crater of the volcano rises out of the sea during an eruption.
Strona 346 - Immense quantities of volcanic substances, which were thrown out at the same time and spread in every direction, propagated the effects of the explosion through the space of many miles. " It is estimated that an extent of ground, of the mountain itself and its immediate environs, fifteen miles long and full six broad, was by this commotion swallowed up in the bowels of the earth.
Strona 434 - Manures supply this deficiency, by furnishing, in greater abundance, the hydrogen, carbon or azote, which they may require. In proportion as soils possess a due degree of tenacity, and power of retaining and absorbing heat and moisture, the necessity for a supply of manure is diminished ; and, in some instances, the earths are so fortunately combined, as to render all supply of artificial manure unnecessary. He, who possesses on his estate the three earths, clay, sand and lime of a good quality,...
Strona 172 - London in the year 1308, by the royal proclamation of Edward the First. In the reign of Queen Elizabeth, the burning of coal was again prohibited in London during the sitting of parliament, lest the health of the knights of the shire should suffer injury during their abode in the metropolis. In...
Strona 277 - Sussex" with the following interesting observations : " We cannot leave this subject without offering a few general remarks on the probable condition of the country, through which the waters flowed that deposited the strata of Tilgate Forest, and on the nature of its animal and vegetable productions. Whether it were an island or a continent, may not be determined ; but that it was diversified by hill and valley, and enjoyed a climate of a higher temperature than any part of modern Europe, is more...
Strona 175 - It has been stated that this coal-field extends over about 1200 square miles, and that there are twenty-three beds of workable coal, the total average thickness of which is ninety-five feet, and the quantity contained in each acre is 100,000 tons, or 65,000,000 tons per square mile. If from this we deduct...