|LC control no.||sh 85144250
|LC classification||QE461 QE462 Petrology
TL557.V64 Aeronautical meteorology
|Topical heading||Volcanic ash, tuff, etc.
|See also||Igneous rocks
|Found in||Dict. geol. terms (tephra; volcanic ejecta: collective term for all clastic volcanic materials which, during an eruption, are ejected from a crater or from some other type of vent and are transported through the air)
GeoRef (Pyroclastics; UF tephra)