Check out the volcano tours offered by Volcano-Adventures!
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Guaranteed tours:
16-20 Nov: Semeru - Bromo Trekking - East Java (Indonesia)
24 Dec - 6 Jan: Desert, salt and volcanoes - Danakil desert (Ethiopia)
8-19 Jan: Unknown Asia - Volcanoes of Myanmar - Myanmar (Burma)
4-17 Feb: Desert, salt and volcanoes - Danakil desert (Ethiopia)
6-21 May: From Krakatau to Bali - Java (Indonesia)
20-27(28) May: Fascination Volcano - Santorini Island (Greece)
29 May - 3 Jun: Aegean's Hidden Gem: Isle of Milos - Milos Island (Greece)
3-18 Jun: From Krakatau to Bali - Java (Indonesia)
8-23 Jul: From Krakatau to Bali - Java (Indonesia)
10-23 Jul: Volcanoes in the South Sea - Vanuatu (South Sea)
: spaces available / : guaranteed / : few spaces left / : booked out

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Illustrated Volcano Glossary

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accretionary lapilli

Volcanology
Accretionary lapilli in an ash deposit on Santorini.
Accretionary lapilli in an ash deposit on Santorini.
Small spherical balls of volcanic ash
Accretionary lapilli are small spherical balls of volcanic ash that form from a wet nucleus falling through a volcanic ash cloud. They can flatten on hitting the ground or may roll on loose ash and grow like a snowball.
 

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