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Walls of active craters are always very unstable. Debris has already deposited on the one-day old snow on the lower terrace inside the crater. (c)
File: est_e31469.jpg | 2676 Hits
--- Image found in Excursion on Etna - climbing the summit craters (Oct. 07)
Etna trekking tour A tour entirely dedicated to Etna, the most active volcano in Europe. Spend 6 full days on Etna and get good chances to see eruptive activity.
Tours by destination We travel to volcanic areas worldwide: from Greece and Italy, Iceland, to Hawai'i, Japan, Indonesia, Vanuatu. We even offer a Round-The-World tour to volcanoes.
Divergent plate boundaries in oceans Two ocean plates move apart from each other. Hot upwelling mantle material forms magmas that continuously produce new oceanic crust. An ocean widens.