黑曜岩火山玻璃，一般为黑色，带状，摔碎时色泽光亮，表面。
A usually black or banded, hard volcanic glass that displays shiny, curved surfaces when fractured and is formed by rapid cooling of lava.
其岩体形态为条带状和同心环带状。
稳定的带状排列是这些含橄榄石岩类杂岩的固定特点。
A consistent zonal arrangement is a constant feature of those complexes that contain olivine - bearing rocks.
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