Discovery of carbonaceous compressions and their multicellular tissues from the Changzhougou Formation (1,800 Ma) in the Yanshan range, North China.
Reference:
Zhu,S. et al. (2000)
Discovery of carbonaceous compressions and their multicellular tissues from the Changzhougou Formation (1,800 Ma) in the Yanshan range, North China. Chinese Science Bulletin (Kexue Tongbao)
Vol. 45 # 9 P. 841- 846