Canadian Rockies, Cambrian, Shale, Field, British Columbia, Yoho National Park, History of the <strong>Burgess Shale</strong>, Stephen Formation, Burgess Shale ... » 

Canadian Rockies, Cambrian, Shale, Field, British Columbia, Yoho National Park, History of the Burgess Shale, Stephen Formation, Burgess Shale Type Fauna, Fossils of the Burgess Shale «