Origin and impact of the oldest metazoan bioclastic sediments Warren, L. V. ; Simoes, M. G. ; Fairchild, T. R. ; Riccomini, C. ; Gaucher, C. ; Anelli, L. E. ; Freitas, B. T. ; Boggiani, P. C. ; Quaglio, F. Abstract Publication: Geology Pub Date: April 2013 DOI: 10.1130/G33931.1 Bibcode: 2013Geo....41..507W