volcaniclastics  search
UFvolcaniclastic rocks
RTigneous rocks
 pyroclastics
 sedimentary rocks
 clastic sediments
 volcanic ash
 sediments
 tuff
 clastic rocks
 terrigenous materials
 ash falls
 pyroclastic flows
 volcanic breccia
 ejecta
 lapilli
SNUsed to indicate material, within sediments or sedimentary rocks, which originated from a volcano. Use pyroclastics for the igneous rock. Added to Thesaurus in 1984.