There is a long term debate about the depositional model of the chert sediment, as well as the definition of the Precambrian-Cambrian boundary because of few index fossils reported.

• 过去对这套硅质岩的沉积模式有多种解释，而且由于生物化石的匮乏而很难确定前寒武纪-寒武纪界线的位置。