s sa sb sc sd se sf sg sh si sj sk sl sm sn so sp sq sr ss st su sv sw sy

Перевод: scoria

[существительное]
шлак ; окалина

Тезаурус:

1. Bombs made from plastic lavas tend to remain where they fall, but denser, more solid bombs sometimes bounce off the sides of the scoria cone at a glancing angle, and acquire a rapid spin.
2. Quite often, also, hot steam blasting through a scoria cone may oxidize or "rust" the iron in the rock, giving the scoria a deep reddish-brown colour.
3. The scoria from a typical Strombolian eruption consists of loose, rubbly material, with a wide range in size of the constituent fragments, but with only a small proportion less than about one millimetre in size.
4. These terms are all very descriptive, since the material which accumulates around a Strombolian vent does indeed look rather like boiler slag, but it is more correctly called scoria, and the cones which build up around the vent scoria cones.
5. Normally, basaltic scoria is a drab grey colour, but sometimes when it is fresh the surface may be beautifully iridescent, shining in peacock blue colours.
6. Unlike a scoria cone though, a pumice cone is usually rather low and poorly defined, and sometimes does not even have a recognizable crater.
7. Many of the fragments which go to make up a scoria cone are individually big enough to be called "blocks" or "bombs", according to the simple size classification.
8. Naturally this crisp geometrical profile becomes softened and less perceptible as scoria cones grow older and are subjected to the normal processes of erosion.
9. Scoria cones are themselves distinctive objects.
10. Their most characteristic feature, though, is that the angle of slope of the sides of the cone is always that of the "angle of rest" for loose scoria, which means that all young scoria cones have side slopes of 33 degrees.