Puy de Montiroir
| Puy de Montiroir | ||
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 The Puy de Montiroir with the eponymous hamlet in the foreground |
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| height | 698 m | |
| location | Puy-de-Dôme department , France | |
| Mountains | Chaîne de la Sioule , Massif Central | |
| Coordinates | 45 ° 58 '13 " N , 2 ° 55' 35" E | |
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| Type | Cinder cone | |
The Puy de Montiroir is an extinct volcano in the French department of Puy-de-Dôme ( Auvergne-Rhône-Alpes region ), which belongs to the Chaîne de la Sioule .
geography
The Puy de Montiroir is located in the municipality of Manzat , about 1.5 kilometers northwest of the town center. Immediately to the southeast is the eponymous hamlet of Montiroir. Clermont-Ferrand in the southeast is around 40 kilometers away from here. The north side of the former volcano is largely forested, the southern slopes are used for agriculture. It is 4 kilometers to the next volcano, the Puy de Chalard further east-southeast .
geology
The strombolian cinder cone of the Puy de Montiroir forms the northernmost branch of the Chaîne de la Sioule , a series of 7 volcanic centers in a north-east-south-west direction, which clearly separates itself from the further east running Chaîne des Puys .
The volcanic rocks of the Chaîne de la Sioule are much older than the volcanoes of the Chaïne des Puys, recognizable by their stronger weathering, some of them already reversing the relief . They originated in the Pliocene and early Pleistocene (period 5 to 1 million years BP ), the second main phase (post-rift) of volcanism in the Massif Central. These are alkali basalts and basanites that emerged from magma that is undersaturated with SiO 2 . They are characterized by the guiding of peridotic sheath inclusions .
literature
G. Guard: Les anciens volcans de la région de Manzat (Puy-de-Dôme) . In: Bulletin de la Société Géologique de France . Tome 22, 1922.
Individual evidence
- ↑ Nehlig, P. et al .: les volcans du Massif Central . In: Revue Géologues, Numéro spécial . BRGM, 2003.