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1 juin 2016
- handle: 10670/1.m09y1t
- hal: hal-02886315
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Clive Oppenheimer et al., « Risk and opportunity at Nabro volcano, Eritrea : a deep time perspective », HAL-SHS : archéologie, ID : 10670/1.m09y1t
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Nabro Volcano is located some 50 km from the coast in the southern Red Sea region of Eritrea. It reaches a maximum elevation of over 2200 m a.s.l. and has an 8 km-wide summit caldera with associated ignimbrites. Its first recorded eruption took place in 2011, displacing several thousand people who lived within the caldera. A field trip focused on understanding this event provided an opportunity to collect samples of older pyroclastic deposits and lavas, which have now been dated using the Ar–Ar method. Several large eruptions have occurred in the Middle to Late Pleistocene. Rhyolite coulees on the flanks of the volcano contained high quality obsidian. Worked obsidian pieces were present in abundance on the surface in various locations visited. The newly-quantified eruption history, along with the evidence for obsidian procurement and recent occupation of the volcano point to a complex relationship between humans and the volcano that has existed for many thousands of years.