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• n  the scum formed by oxidation at the surface of molten metals

• Lank shadows and stocky, the fluttering shadows of dresses, the ridiculous elongated shadows of trousered legs, darted and danced last week all over the reddish scoria of the .
• Not molten lava, but pumice dust and hot scoria (like clinkers from a furnace) flew out of the crater, making the earth for miles around too hot to live in.

• slag
• dross

News & Articles

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• Coming Home: Rejoicing as little sister returns home
  I used to watch her pedal her little bike down the road toward the house, her curls bleached by the sun and her chubby face flushed from the effort it takes to navigate small wheels over uneven scoria.
  Oct. 6, 2013 - The Fargo Forum

Quotes

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• Lindsay Crocker in Dispatch Online
  We trained on it and it looked pretty good. With the portable pitch technology we thought there was a possibility but NZC decided there wasn't,Crocker said. "It had much firmer compaction, they're using a scoria base which helped the pace...