Loose Materials : Solid material in particle form that is capable of subsiding or flowing in such a manner as to trap or engulf a person, e.g. sand, grain, fertilser, sawdust
Ministry of Business, Innovation and Employment, Glossary of terms and acronyms, Wellington, New Zealand 2010. http://wwwsosh.govt.nz/resources/glossary-u.shtml, (Occupn Hlth and Sfty - Brit) {530}