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Guaranteed tours:
4-11 Aug 2019: Nyiragongo Lava Lake & Mountain Gorillas - DR Congo
12-30 Aug 2019: Kamchatka - Land of Colors - Kamchatka (Russia)
13-29 Aug 2019: Volcanoes of Java - Java (Indonesia)
1-19 Sep 2019: Kamchatka - Land of Colors - Kamchatka (Russia)
3-18 Sep 2019: From Krakatau to Bali - Java (Indonesia)
21-28 Sep 2019: Pearl of the Aegean - Santorini - Santorini Island (Greece)
12-20 Oct 2019: From Stromboli to Etna - Eolian Islands + Etna volcano (Italy)
2-18 Nov 2019: Volcanoes and Spices - N-Sulawesi + Halmahera (Indonesia)
9-17 May 2020: From Stromboli to Etna - Eolian Islands + Etna volcano (Italy)
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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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