 | Sir Charles Lyell - 1845 - 720 pagina’s
...XXIII. or corresponding to that of the shore at this point. After walking about a quarter of a mile, I found another set of similar furrows, having the...mechanical power to groove the ledge of soft sandstone. is common use for large sheets of ice several acres in area, which are sometimes floated off from the... | |
 | Jared Sparks, Edward Everett, James Russell Lowell, Henry Cabot Lodge - 1845 - 574 pagina’s
...stated that fragments of the ' black stone ' which fell from the summit of the cliff, a pile of which lay at its base, were often frozen into the ice, and...have furnished sufficient pressure and mechanical powerto groove the ledge of soft sandstone." — Vol. n., pp. 144- 146. We have touched only upon some... | |
 | Jared Sparks, Edward Everett, James Russell Lowell, Henry Cabot Lodge - 1845 - 560 pagina’s
...cliff, a pile of which lay at its base, were often frozen into the ice, and moved along with it. 1 then examined these fallen blocks of amygdaloid scattered...mechanical power to groove the ledge of soft sandstone." — Vol. it., pp. 144- 146. We have touched only upon some of the simpler of the geological matters... | |
 | Hugh Miller - 1865 - 446 pagina’s
...— a pile of which lay at its base — were often frozen into the ice, and moved along with it. And I have no doubt that the hardness of these gravers, firmly fixed in masses of ice, which, though only fifteen feet thick, are often of considerable horizontal extent, has furnished sufficient... | |
 | Hugh Miller - 1869 - 436 pagina’s
...a pile of which lay at its base, — were often frozen' into the ice, and moved along with it. And I have no doubt that the hardness of these gravers, firmly fixed in masses of ice, which, though only fifteen feet thick, are often of considerable horizontal extent, has furnished sufficient... | |
 | George Frederick Wright - 1889 - 704 pagina’s
...of amygdaloid scattered around me, and observed in them numerous geodes coated with quartz-crystals. I have no doubt that the hardness of these gravers,...mechanical power to groove the ledge of soft sandstone.* Stones are also striated by other agencies than moving ice. Extensive avalanches and land-slides furnish... | |
 | George Frederick Wright, Warren Upham - 1889 - 662 pagina’s
...of amygdaloid scattered around me, and observed in them numerous geodes coated with quartz-crystals. I have no doubt that the hardness of these gravers,...ice, which, although only fifteen feet thick, are of ten of considerable horizontal extent, have furnished sufficient pressure and mechanical power to... | |
 | Sir Henry Hoyle Howorth - 1893 - 416 pagina’s
...packed ice in which fragments of hard stone coated with quartz crystals were frozen ; and he adds, " I have no doubt that the hardness of these gravers,...pressure and mechanical power to groove the ledge of soft sandstone.7 In our speculations, therefore, on the carrying power of ice, we ought always to remember... | |
 | George Frederick Wright - 1911 - 848 pagina’s
...of amygdaloid scattered around me, and observed in them numerous geodes coated with quartz-crystals. I have no doubt that the hardness of these gravers,...ice, which, although only fifteen feet thick, are of ten of considerable horizontal extent, have furnished sufficient pressure and mechanical power to... | |
 | 1917 - 594 pagina’s
...examined these fallen blocks of amygdaloid scattered round me, and observed in them numerous geodcs coated with quartz crystals. I have no doubt that...firmly fixed in masses of ice, which, although only IS feet thick, are often of considerable horizontal extent, have furnished sufficient pressure and... | |
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He also stated that fragments of the " black stone" which fell from the summit of the cliff, » a pile of which, d, fig. 16, lay at its base, were often frozen into the ice, and moved along with it. I then examined these fallen blocks of amygdaloid scattered... 
