 In the meantime, the boulders and angular fragments brought down the ravines and river by the floods, are being cemented into a firm conglomerate so that it is difficult to dislodge even a small pebble, the pebble itself sometimes breaking before the...  American Journal of Science and Arts - 157 ページ1851全文表示 - この書籍について
 | 1851 - 520 ページ
...floods are being cemented into a firm conglomerate, so that it is difficult to dislodge even a single pebble, the pebble itself sometimes breaking before...fragments appeared midway between petrifaction and carbonisation. In this connection, finding some drops of a very dense fluid, and also highly refractive,... | |
 | 1852 - 450 ページ
...cemented into a firm conglomerate, so that it is difficult to dislodge even a small pebble, the peoble itself sometimes breaking before the cementation yields....I discovered the stump of a large tree, silicified ; m another, a log changed to lignite or brown coal: Other fragments appeared midway between petrifaction... | |
 | John Russell Bartlett - 1854 - 732 ページ
...into alum. In the mean time the boulders and angular fragments brought down the ravines and river by floods are being cemented into a firm conglomerate...to dislodge even a small pebble, the pebble itself breaking before the conglomerate yields. " The thermal action on wood in this place is also highly... | |
 | Edward Hitchcock, Charles Henry Hitchcock - 1860 - 442 ページ
...into alum. In the meantime the bowlders and angular fragments brought down the ravine and river by floods, are being cemented into a firm conglomerate,...sometimes breaking before the cementation yields." Mr. Shepherd adds: " the metamorpliic action going on is at this moment effecting important changes... | |
 | Edward Hitchcock, Charles Henry Hitchcock - 1862 - 434 ページ
...into alum. In the meantime the bowlders and angular fragments brought down the ravine and river by floods, are being cemented into a firm conglomerate,...sometimes breaking before the cementation yields." Mr. Shepherd adds: " the metamorphic action going on is at this moment effecting important changes... | |
 | Joel Dorman Steele - 1874 - 314 ページ
...into alum. The boulders and angular fragments brought down the ravine by floods are being converted into a firm conglomerate, so that it is difficult...pebble, the pebble itself sometimes breaking before the cement will yield.— Shepherd, Am, Jaurn. of Science. metamorphosed. How many times this cycle of... | |
 | Joel Dorman Steele - 1876 - 302 ページ
...down tha • ravine by floods are being converted into a firm conglomerate, so that it is difflcult to dislodge even a small pebble, the pebble itself sometimes breaking before the cement will yield.— Shepherd, Am. Jaurn. of Science. metamorphosed. How many times this cycle of... | |
 | Joel Dorman Steele - 1877 - 302 ページ
...into alum. The boulders and angular fragments brought down the ravine by floods are being converted into a firm conglomerate, so that it is difficult...pebble, the pebble itself sometimes breaking before the cement will yield.— Shepherd, Am. Journ. of /Science. metamorphosed. How many times this cycle of... | |
 | J. Dorman Steele - 1877 - 298 ページ
...into alum. The boulders and angular fragments brought down the ravine by floods are being converted into a firm conglomerate, so that it is difficult...pebble, the pebble itself sometimes breaking before the cement will yield.—Shepherd, Am. Journ. of Science. metamorphosed. How many times this cycle of change... | |
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