Lapilli
Volcanic ashes, consisting of small, angular, stony fragments or particles.
Lapilli
Lapilli is a size classification of tephra, which is material that falls out of the air during a volcanic eruption or during some meteorite impacts. Lapilli (singular: lapillus) is Latin for .
Tuffnoun
(rock) A light porous rock, now especially a rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel.
Tuffnoun
Same as Tufa.
Tuffnoun
hard volcanic rock composed of compacted volcanic ash
Tuffnoun
a light, porous rock formed by consolidation of volcanic ash.
Tuff
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Following ejection and deposition, the ash is lithified into a solid rock.