The scum formed by oxidation at the surface of molten metals.
1 The practically trained eye could see the scoria which indicates the defective welding.
2 We climb mountains over scoria that frays and lava that burns.
3 Crater Lake, with Wizard Island, a post-caldera collapse basaltic scoria cone.
4 Rings of pale-coloured scoria may be due to tin, zinc, antimony, or arsenic.
5 We passed through a lane of black scoria , with steep banks on both sides.
6 On approaching nearer the apex, the path was over cinders, fine black sand, and scoria .
7 His followers dug straight down into red volcanic scoria .
8 These buildings are of the dark grey scoria , almost imperishable I suppose, and look very well.
9 Cinder cones are like giant anthills of scoria .
10 Now red scoria and pumice and sulphur boiled and rolled where the hard lava had frayed our boots.
11 To the south lay broken shapes of scoria in a lava bed as far as the eye could see.
12 The headlong, stammering, vivid man had made a mistake-thefat, unwieldy, diamond-heartedcreature, all crusted with slag and scoria .
13 The cone which rises from its center is remarkably regular, and consists for the most part of cinders and scoria .
14 Ima Itikarai also warned of the potential for mud slides given the ash and scoria fall mixing with current heavy rains.
15 The second phase was more dominated by lava flows making the island larger and growing what we call a scoria cone.
16 Two villages on the south-east of the island were showered in scoria rocks of 2 centimetres in diameter Mr Itikarai said.
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