Principles of Geology: Being an Inquiry how Far the Former Changes of the Earth's Surface are Referable to Causes Now in Operation, Volumen 1J. Kay, jun. & brother, 1837 - 546 páginas |
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Página 8
... sand . Collectively , there are an estimated 64,200,000 tons of silica sand in the deposit . Additional silica sands are probably present west of Highway 34. These have not been tested by drilling . If the av- erage thickness of ...
... sand . Collectively , there are an estimated 64,200,000 tons of silica sand in the deposit . Additional silica sands are probably present west of Highway 34. These have not been tested by drilling . If the av- erage thickness of ...
Página 14
... sand and pebbles ( 1 : 2 : 4 mix ) . 66 0-11 Elgin sand and pebbles ( 1 : 3 : 5 mix ) . 0-11 " 8888 0.646 98 90 68 47 24 0.612 100 100 100 100 100 99 97 99 88888 0 3.27 98 70 70 6.75 82 75 65 47 5 0 5.60 96 88 80 72 61 43 40 5.43 ...
... sand and pebbles ( 1 : 2 : 4 mix ) . 66 0-11 Elgin sand and pebbles ( 1 : 3 : 5 mix ) . 0-11 " 8888 0.646 98 90 68 47 24 0.612 100 100 100 100 100 99 97 99 88888 0 3.27 98 70 70 6.75 82 75 65 47 5 0 5.60 96 88 80 72 61 43 40 5.43 ...
Página 13
... sand to waters . However , the absence of montmorillonites does not guarantee that a sand will be insensitive to water , because large amounts of less reactive clays can impart a degree of water sensitivity to a sand , as illustrated by ...
... sand to waters . However , the absence of montmorillonites does not guarantee that a sand will be insensitive to water , because large amounts of less reactive clays can impart a degree of water sensitivity to a sand , as illustrated by ...
Página 5
... sand forms a negligible part . Sand is con- centrated on the continental blocks rather than in the oceanic basins . Sand forms a fourth to a third of the sediments on the continental plat- form ( including the mobile belts and ...
... sand forms a negligible part . Sand is con- centrated on the continental blocks rather than in the oceanic basins . Sand forms a fourth to a third of the sediments on the continental plat- form ( including the mobile belts and ...
Página
... sand. It was not easy walking on the sand. It shifted and slid beneath his feet, and it often required two steps just to travel one. Harriok rode a special breed of horse Morgin had heard of but never seen. It had large, broad hooves ...
... sand. It was not easy walking on the sand. It shifted and slid beneath his feet, and it often required two steps just to travel one. Harriok rode a special breed of horse Morgin had heard of but never seen. It had large, broad hooves ...
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Términos y frases comunes
afterwards alluvial ancient animals appear basalt beds Calabria carboniferous causes century changes channel cliffs climate coast cone considerable continued convulsions crater deep delta deposits depth distance district earth earthquakes elevation eruption estuary Etna existing feet fissures flood flowed formation formed former fossil geological geologist globe gradually granite gulf heat height Herculaneum hills igneous igneous rocks inhabitants Ischia island Isle Journ lakes land lapilli latitudes lava limestone marine mass matter Mediterranean miles mineral modern Monte Nuovo mountains nature northern observed ocean origin period phenomena Phil plain plants Polistena Pompeii present produced pumice quadrupeds quantity regions remains rise river rocks sand scoriæ sediment shells shock shores Sicily side Solfatara species springs Strabo strata stream subterranean supposed surface temperature tertiary theory thrown tides tion trachyte tract Trans travertin tuff valley vapour vegetable Vesuvius violent volcanic whole
Pasajes populares
Página 152 - A thousand men, that fishes gnaw'd upon; Wedges of gold, great anchors, heaps of pearl, Inestimable stones, unvalued jewels, All scatter'd in the bottom of the sea...
Página 49 - He knew the seat of paradise, Could tell in what degree it lies: And, as he was disposed, could prove it, Below the moon, or else above it.
Página 436 - Thy waters washed them power while they were free, And many a tyrant since: their shores obey The stranger, slave or savage; their decay Has dried up realms to deserts: — not so thou, Unchangeable save to thy wild wave's play — Time writes no wrinkle on thine azure brow — Such as creation's dawn beheld, thou rollest now.
Página 36 - I found the sea in the same place, and on its shores were a party of fishermen, of whom I inquired how long the land had been covered by the waters. 'Is this a question/ said they, ' for a man like you? this spot has always been what it is now.
Página 72 - ... in the planetary motions, where geometry has carried the eye so far both into the future and the past, we discover no mark either of the commencement or the termination of the present order.
Página 73 - Author of nature has not given laws to the universe, which, like the institutions of men, carry in themselves the elements of their own destruction. He has not permitted in His works any symptom of infancy or of old age, or any sign by which we may estimate either their future or their past duration. He may put an end, as he no doubt gave a beginning, to the present system at some determinate period of time ; but we may rest assured that this great catastrophe will not be brought about by the laws...
Página 417 - ... above its ordinary level. The mountains of Arrabida, Estrella, Julio, Marvan, and Cintra, being some of the largest in Portugal, were impetuously shaken, as it were, from their very foundations; and some of them opened at their summits, which were split and rent in a wonderful manner, huge masses of them being thrown down into the subjacent valleys.
Página 17 - GEOLOGY is the science which investigates the successive changes that have taken place in the organic and inorganic kingdoms of nature : it inquires into the causes of these changes, and the influence which they have exerted in modifying the surface and external structure of our planet.
Página 149 - In the above passages, the author deduces two important conclusions from geological data: first, that in the successive groups of strata, from the oldest to the most recent, there is a progressive development of organic life, from the simplest to the most complicated forms; — secondly, that man is of comparatively recent origin.
Página 42 - ... fossils were mere sports of nature. An additional period of a century and a half was now destined to be consumed in exploding the hypothesis, that organised fossils had all been buried in the solid strata by Noah's flood. Never did a theoretical fallacy, in any branch of science, interfere more seriously with accurate observation and the systematic classification of facts. In recent times, we may attribute our rapid progress chiefly to the careful determination of the order of succession in mineral...