This observation can be collected semi weathered specimens, due to weathering of plagioclase pale, and can be easily distinguished from darkminerals.
这时,可采集半风化的标本观察,由于斜长石风化后颜色变浅,而与暗色矿物易于区别。
2
The dry land of the continents consists mostly of granite and other light silicate minerals, while the ocean floors are made up mostly of a dark, dense volcanic rock called basalt.
陆地地壳主要由花岗岩和其它轻质硅酸盐矿物构成,而海底则主要由黑色的高密度火山岩——玄武岩构成。
3
A dark mineral consisting of oxides of yttrium and erbium and tantalum and other minerals.