Stratigraphic schematic introduction: A schematic stratigraphic diagram of the west open-pit mine. From top to bottom, they are gravel layer, green shale, kerogen shale, coal in this layer, tuff and basalt.
Attraction
Stratigraphic schematic introduction: A schematic stratigraphic diagram of the west open-pit mine. From top to bottom, they are gravel layer, green shale, kerogen shale, coal in this layer, tuff and basalt.