The Shuangwang gold-bearing albitite zone, which is composed of stratabound albitite, albitite breccia occurred conformably in the Xinghongpu Group, Devonian silt-slate.
Oxygen levels in the Devonian and Carboniferous periods, when terrestrial life first bloomed, were as high as 35 percent (as opposed to nearer 20 percent now).
When they first appeared in the Early Devonian, the fungal spires of Prototaxites towered over everything else that grew, burrowed, and crawled around them.