Highly metalliferous carbonaceous shale and Early Cambrian seawater: COMMENT and REPLY: COMMENT Jiang, S. -Y. ; Zhao, K. -D. ; Li, L. ; Ling, H. -F. ; Zhu, M. Abstract Publication: Geology Pub Date: January 2007 DOI: 10.1130/G24437C.1 Bibcode: 2007Geo....35E.158J