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pumice |
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pumiceLight volcanic rock produced by the frothing action of expanding gases during the solidification of lava. It has the texture of a hard sponge and is used as an abrasive. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Their march this day lay among singular hills and knolls of an indurated red earth, resembling brick, about the bases of which were scattered pumice stones and cinders, the whole bearing traces of the action of fire. Some of his low places he found lifted to ideals, some of his ideas had sunk to the valleys, and lay there with the sackcloth and ashes of pumice stone and sulphur on their ruined heads. The strata are of sandstone, and one layer was remarkable from being composed of a firmly- cemented conglomerate of pumice pebbles, which must have travelled more than four hundred miles, from the Andes. |
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