Stromatolitic cherts from the Mesoproterozoic Gaoyuzhuang Formation (1.4- 1.5Ga) contain well preserved, paleoecologically diverse microfossils.

• 华北中元古代高于庄组 ( 1 4- 1 5亿年 )的硅质叠层石中保存了完好的多种微生物化石。