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BafaU. 449 Unmelted, on coal, and even intercepted between ftrata of coal. Defmaretz feit this inconfiftence, a’nd endey- vours to explain it away. “ Moll: of the prilmatic “ mafies (iays he) announce clearly, by their “ fituation, their origin, and nature of compadt “ lava • but fome of thefe mafies, in confequence “ of alterations that have vifibly taken place in “ the primitive difpofition of the currents, either “ in the tuinult of pofterior eruptions, or more “ efpecially by the degradations arifing from wa- “ ter, have 110 longer preferved their connexion “ with thefe currents, and in that cafe we find “ thefe pillars fingle, perched on infulated fum- “ mits, whofe bafis isa fnbflance no way injured “ by fire.” It is furprifing, howeyer, that wa ter fhould fweep away the foundation on which they ftood, and yet leave them ftanding; but even this harfh fuppofition will not folve the difn- culty. Mr. Faujas, near Villeneuve de Berg, found malles of limeftone and baialt adjoining to each other, and even incorporated, and mixed with each other; he examined the limeftone thus mixed, and inftead of finding it cauftic, as Ihould naturallv be expedted, it effervefeed as uiual. In Lefke’s'Cabinet, G. 294, we meet with bafalt ftuck in granite, and yet the felfpar of this gra- nitc retains its lullre, and the quartz its tranfpa- rei Dr.’ Hamilton does not feem willing to allow the fadt; he teils us, he found the Amts lntermixed with bafalts, opake and Ihincry, and the coal as if it were glazed, and chnrred, refufmg to inflame. As to the flints, it is fo common to find them dull, whitilh, and opake, in countries moft cer- tainly not volcanic, that this indication cannot be J q g much