Use "scoria" em uma frase

1. Whence came they? how planted upon this once scraggy scoria of a country?

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2. The products of volcanoes bear no similarity of origin, or kindred resemblance to meteoric stones; those are lavas of different kinds, pumicestone, scoria, ashes, &c

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3. — in scoria, Wollaston's mode of detecting, xix, 188

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