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单词 volcanic bomb
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volcanic bomb
5. A roundish mass of lava thrown out of a volcano. Chiefly in volcanic bomb.
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the world > the earth > structure of the earth > constituent materials > ejected volcanic material > [noun] > volcanic bomb
bomb1780
breadcrust bomb1888
1780 W. Hamilton in Philos. Trans. (Royal Soc.) 70 63 Others again burst into a thousand pieces soon after their emission from the crater: they might very properly be called volcanic bombs.
1798 R. Jameson Outl. Mineral. Shetland Islands 56 Any appearance of..what the Volcanists call volcanic bombs.
1833 C. Lyell Princ. Geol. III. Gloss. 83 Volcanic Bombs, volcanos throw out sometimes detached masses of melted lava, which, as they fall, assume rounded forms (like bomb-shells), and are often elongated into a pear shape.
1839 C. Darwin in R. Fitzroy & C. Darwin Narr. Surv. Voy. H.M.S. Adventure & Beagle III. xxiii. 589 In some parts rounded volcanic bombs, which must have assumed this form, when projected red-hot from the crater, lie strewed on the surface.
1878 T. H. Huxley Physiography (ed. 2) 193 Sometimes the masses of lava..fall as..volcanic bombs.
1956 W. Edwards in D. L. Linton Sheffield 8 Tuffs are especially well seen in the Ashaver anticline,..and are dark green, brown, and purple well-bedded basaltic ashes with ‘bombs’ of basalt, limestone, and chert.
1969 Nature 8 Nov. 557/2 Volcanic activity occurred at several places along this fracture and fresh bombs rest on the ice close to the edge of the chasm.
extracted from bombn.
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