Pyroclastic flow deposits have amazingly sharp margins. An intermediate zone (in the upper middle of the image), a few meters wide, is where the surge of hot gas surrounding the particle-rich flow burnt the gras. (Photo: Tom Pfeiffer)
Desert, Salt & Volcanoes: Experience one of the geologically most active areas on the planet: the Danakil desert in northern Ethiopia. Highlights include Erta Ale volcano with its active lava lake and Dallol hydrothermal fields offering a surreal landscape of colors, salt, geysers and springs.
Dukono volcano photos: Dukono on Halmahera in Indonesia has been in permanent activity for years, often producing ash plumes that drift around the northern part of the island and have become normality.
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