black graptolite shale黑色笔石页岩
black muddy shale黑色泥质页岩
Eureka black shale尤里卡黑页岩
Clip Black Shale夹黑色页岩
sulfide containing black shale硫化物黑色页岩
black shale formations黑色页岩建造
Niutitang black shale牛蹄塘组黑色岩系
marine black shale海相黑色页岩
The sources for the heavy-metal contamination of the soils are directly related to the bedrock,the carbonaceous black shale.
黑色页岩即为土壤重金属污染的污染源。
参考来源 - 湘中HJC铀矿区黑色页岩土壤重金属污染地球化学分析