Volcaniclastic : A body of rock that is composed of fragments of volcanically derived rocks or minerals that were then transported some distance from their place of origin
U.S. Geological Survey, U.S. Department of the Interior, Volcano Hazards Program, Glossary, Washington, DC, USA 2011. http://volcanoes.usgs.gov/vsc/glossary/alluvium.ht ml, (ND/ Volc Emr - Amer) {795}