ABSTRACT : Ignimbrite is a type of pyroclastic rocks, and it`s occurence is still debated. Ignîmbrite is an interesting pyroclastic rock for geologist and volc.anolog.isl. because it. covers large areas, and composed of volconic glass, pumice, and lithic clasts. It has been, not observed in active volcanoes, therefore it is found more interesting. Ignimbrites are contenting abundant pumices, laminar flows, the. pyroclastic flow units products and are emplaced at high temperatures.. `They .are occasionally welded. Synonyms are tuff flow, pumice flow, welded tuff, welded mud. flow, and. hot ash flow.