Pyroclastic fall refers to the ash, lapilli, blocks or bombs produced during an explosive magmatic eruption that fall to Earth, usually from an eruption column
Jan Lindsay, Jerome David, John Shepherd and Judith Ephraim, Volcanic Hazard Assessment for Saint Lucia, Lesser Antilles, Glossary Of Terms Used In This Report, Seismic Research Unit The University of the West Indies St. Augustine Trinidad and Tobago 2002. file:///C:/Users/user/Downloads/1001.pdf, (ND/ Volc Emr - Brit) {963}