The ultimate summit eruption of Puy de Dôme volcano (Chaîne des Puys,French Massif Central) about 10,700 years ago |
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| Authors: | Didier Miallier Pierre Boivin Catherine Deniel Alain Gourgaud Philippe Lanos Marie Sforna Thierry Pilleyre |
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| Institution: | 1. LPC, CNRS/IN2P3, Clermont université, université d’Auvergne, 63177 Aubière cedex, France;2. Laboratoire magmas et volcans, Clermont université, université Blaise-Pascal, BP 10448, 63000 Clermont-Ferrand, France;3. CNRS, UMR 6524, LMV, 63038 Clermont-Ferrand, France;4. IRD, R 163, LMV, 63038 Clermont-Ferrand, France;5. CNRS UMR 5060 institut de recherche sur les archéomatériaux (IRAMAT), centre de recherche en physique appliquée à l’archéologie (CRPAA), université Bordeaux 3, Bordeaux, France;6. LPC, CNRS/IN2P3, Clermont université, université Blaise Pascal, 63177 Aubière cedex, France |
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| Abstract: | The Puy de Dôme volcano is a trachytic lava dome, about 11,000 y old. New pyroclastic layers originating from the volcano itself were discovered covering the summit and the flanks of the volcano. These pyroclastic layers do not fit with the previous interpretation, assuming a non-explosive dome-forming eruption. The tephra display pyroclastic surge features and exhibit fresh trachytic lapilli, basement lithics, allogeneous basaltic lava and clinker fragments requiring an open vent eruption. This ultimate eruption occurred after a period of rest, long enough for vegetation to develop on the volcano, as evidenced by carbonized plant fragments. Radiocarbon dating of some of these fragments gave an age of c.10,700 y also suggesting a significant rest duration. |
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| Keywords: | Puy de Dô me Lava dome Trachyte Crater France |
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