用“black shale”造句大全，black shale造句
The black shale series in northern Guizhou consist mainly of silicate, phosphate, metal-rich shale and black shale.
REE geochemical characteristics of the Lower Cambrian black shale series in Shitai area,Anhui Province,and their geological significance
The Upper Triassic Formation is sub-abysmal basinal facies deposit in the south and north depressions. A black shale layer developed.
The Miaohe-type biotas occur in the black shale and siliceous shale in the transitional areas from the late open platform facies to deep-water shelf-bathyal facies.
The palace of grey-black shale is located in the north-central part of Shangjing. It covers an area of 1000 mu, four city gates and four corner towers. The wall thickness exceeds the height.
During the prospecting in Qinggchengzi area, we should also pay attention to other minerals occurred in the black shale series.
In the stone coal layer and the overlying black shale, there is a pyrite layer.
Ore prospect should be directed to PGE deposits both related to Emeishan basalt and black shale sequence.
