Smooth and rough forms of this substance are called pahoehoe [pahÂ­HOHÂ­ayÂ­hohÂ­ay] and a'a [AHÂ­ah].
Deccan and Siberian traps were formed from this natural substance. Smooth and rough forms of this substance are called pahoehoe [pahÂ­HOHÂ­ayÂ­hohÂ­ay] and a'a [AHÂ­ah]. (*) Pumice and obsidian glass result from this substance cooling. For 10 points, name this molten rock that forms igneous rocks and comes out of volcanos.
Deccan and Siberian traps were formed from this natural substance.
lava (accept magma; prompt on "molten rock" or equivalents until it is read)