New Burgess Shale Fossil Sites Reveal Middle Cambrian Faunal Complex

Science  14 Oct 1983:
Vol. 222, Issue 4620, pp. 163-167
DOI: 10.1126/science.222.4620.163


Soft-bodied and lightly sclerotized Burgess shale fossils have been found at more than a dozen new localities in an area extending for 20 kilometers along the front of the Cathedral Escarpment in the Middle Cambrian Stephen Formation of the Canadian Rockies. Five different fossil assemblages from four stratigraphic levels have been recognized. These assemblages represent distinct penecontemporaneous marine communities that together make up a normal fore-reef faunal complex.