Lahar 03 : A flowing mixture of water-saturated rock debris that forms on the slopes of a volcano and moves downslope under force of gravity - sometimes referred to as a debris flow or mudflow
County of Humboldt, Volcano Ash Contingency Plan to the Emergency Operations Plan, Glossary, Humboldt Operational Area, Humboldt County Sheriffs Office, Office of Emergency Services, Eureka, CA, USA 2014. http://humboldtgov.org/DocumentCenter/View/6209, (ND/ Volc Emr - Amer) {965}