pyroclastic flows  search
RTash flows
 ash-flow tuff
 base surges
 clastic sediments
 flow texture
 igneous rocks
 ignimbrite
 nuees ardentes
 pyroclastics
 sediments
 shirasu
 tuff
 volcanic ash
 volcanic rocks
 volcaniclastics
 volcanism
SNAdded to Thesaurus in 1985.