The earliest Cambrian record of animals and ocean geochemical change Maloof, A. C. ; Porter, S. M. ; Moore, J. L. ; Dudas, F. O. ; Bowring, S. A. ; Higgins, J. A. ; Fike, D. A. ; Eddy, M. P. Abstract Publication: Geological Society of America Bulletin Pub Date: November 2010 DOI: 10.1130/B30346.1 Bibcode: 2010GSAB..122.1731M