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Diaporama

Volcan Krakatau (Indonésie) juillet 2012: champs de fumerolles

Extensive fumarole fields and large expanses of altered ground are found on the southern and western base of the main cone, especially in the valley between the low, pre-1990 crater rim and the cone. Here are some impressions taken in July during our expedition to Krakatau.
A large bomb in the saddle between the old crater rim and the main cone of Anak has been covered by white and yellow sulfate deposits. (Photo: Tom Pfeiffer)
A large bomb in the saddle between the old crater rim and the main cone of Anak has been covered by ... [info]
(330 Hits)
Strong steaming from a fumarole field on the lower southern flank of Anak Krakatau. (Photo: Tom Pfeiffer)
Strong steaming from a fumarole field on the lower southern flank of Anak Krakatau. (Photo: Tom Pfei... [info]
(400 Hits)
Block encrusted with yellow and orange oxides and sulfur. (Photo: Tom Pfeiffer)
Block encrusted with yellow and orange oxides and sulfur. (Photo: Tom Pfeiffer) [info]
(342 Hits)
Small fumarole vent. (Photo: Tom Pfeiffer)
Small fumarole vent. (Photo: Tom Pfeiffer) [info]
(354 Hits)
Oxides and fumarole minerals of various colors cover the ground. (Photo: Tom Pfeiffer)
Oxides and fumarole minerals of various colors cover the ground. (Photo: Tom Pfeiffer) [info]
(455 Hits)
Beautiful monoclinic sulfur needles form around some of the hotter fumarolic vents. (Photo: Tom Pfeiffer)
Beautiful monoclinic sulfur needles form around some of the hotter fumarolic vents. (Photo: Tom Pfei... [info]
(416 Hits)
Sublimating sulfur covers blocks and gives them a greenish-yellowish stain. (Photo: Tom Pfeiffer)
Sublimating sulfur covers blocks and gives them a greenish-yellowish stain. (Photo: Tom Pfeiffer) [info]
(315 Hits)
Oxidized and sulfur-covered blocks. (Photo: Tom Pfeiffer)
Oxidized and sulfur-covered blocks. (Photo: Tom Pfeiffer) [info]
(336 Hits)
View across the fumarole field towards the west with Rakata island in the left background. (Photo: Tom Pfeiffer)
View across the fumarole field towards the west with Rakata island in the left background. (Photo: T... [info]
(343 Hits)
Our group walking on white altered ground at the foot of the cone of Anak Krakatau (Photo: Tom Pfeiffer)
Our group walking on white altered ground at the foot of the cone of Anak Krakatau (Photo: Tom Pfeif... [info]
(312 Hits)
Yellow-greenish ground in the very active fumarole field. (Photo: Tom Pfeiffer)
Yellow-greenish ground in the very active fumarole field. (Photo: Tom Pfeiffer) [info]
(327 Hits)
Yellow block coated by oxides and sulfur. (Photo: Tom Pfeiffer)
Yellow block coated by oxides and sulfur. (Photo: Tom Pfeiffer) [info]
(362 Hits)

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