Evidence for catastrophic volcanic debris flows in Pemberton Valley, British Columbia Simpson, K. A. ; Stasiuk, M. ; Shimamura, K. ; Clague, J. J. ; Friele, P. Abstract Publication: Canadian Journal of Earth Sciences Pub Date: 2006 DOI: 10.1139/E06-026 Bibcode: 2006CaJES..43..679S