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Danakil expedition Nov-Dec 08, part I: Erta Ale volcano

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The lava lake is sometimes effectively "tapped" for more than an hour at a time - covered with a stable crust preventing degassing. At some point, this crust becomes too heavy to be supported and often triggers spectacular overturns, permitting the lake to degas again in often very violent fountains. (Photo: Tom Pfeiffer)
The lava lake is sometimes effectively "tapped" for more than an hour at a time - covered with a sta... [info]
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A circular fountain starts to develop at the margins of the lake, after a period where the lake was tapped by a solid crust. (Photo: Tom Pfeiffer)
A circular fountain starts to develop at the margins of the lake, after a period where the lake was ... [info]
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The solid crust is breaking up starting from its margins where degassing has resumed in a violent fountain. (Photo: Tom Pfeiffer)
The solid crust is breaking up starting from its margins where degassing has resumed in a violent fo... [info]
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The lava fountain at the margin of the lake. (Photo: Tom Pfeiffer)
The lava fountain at the margin of the lake. (Photo: Tom Pfeiffer) [info]
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The view from the north onto the lava lake inside its pit crater, about 50 meter wide, in the south crater. (Photo: Tom Pfeiffer)
The view from the north onto the lava lake inside its pit crater, about 50 meter wide, in the south ... [info]
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A collision zone between two plates of the lava lake's crust where one plate is thrusted over the other plate.  (Photo: Tom Pfeiffer)
A collision zone between two plates of the lava lake's crust where one plate is thrusted over the ot... [info]
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The walls of the lake are composed of many pahoehoe flows from repeated overflows.  (Photo: Tom Pfeiffer)
The walls of the lake are composed of many pahoehoe flows from repeated overflows. (Photo: Tom Pfei... [info]
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Exploding lava bubble on the axis of a rift zone. (Photo: Tom Pfeiffer)
Exploding lava bubble on the axis of a rift zone. (Photo: Tom Pfeiffer) [info]
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The floor of the caldera consists of pahoehoe lava flows, most of them originating from eruptions caused by overflows of the lava lake. (Photo: Tom Pfeiffer)
The floor of the caldera consists of pahoehoe lava flows, most of them originating from eruptions ca... [info]
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The group and our camp above the south crater. (Photo: Tom Pfeiffer)
The group and our camp above the south crater. (Photo: Tom Pfeiffer) [info]
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Sunset touches the upper caldera rims of the Erta Ale volcano. Behind is another caldera and Hayli Gubbi shield volcano in the far background with its own summit caldera. (Photo: Tom Pfeiffer)
Sunset touches the upper caldera rims of the Erta Ale volcano. Behind is another caldera and Hayli G... [info]
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The shadow of a spatter cone near the southern pit crater and the illuminated eastern caldera wall. (Photo: Tom Pfeiffer)
The shadow of a spatter cone near the southern pit crater and the illuminated eastern caldera wall. ... [info]
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