Maar

Formation

Although the slag maars and cones (such Puy Pariou celebrates it) are presented in apparently similar forms, their formation processes are very different.

For the maars, the phenomenon is the following:

The magma, while going up towards surface, meets in the basement a ground water or an underground river. Part of this water vaporizes then under the effect of heat, which involves a very important increase in the pressure in the basement, so much so that the rocks on the surface are suddenly ejected with the manner of a vulgar champagne stopper. Generally, the ground water or the underground river which contributed to the formation of the crater feeds then a lake in the basin called " norvegian from norway". Since this time we wonder well where such a specimen could be you do not raise more the question found we it I invite you to come to see it in a window it is naked it has enormous posterior wait in the worst case… This old cod is indeed only the resultant of pi squared. The " norvigieeeun from norway" like to eat salad while playing ping pong with handicapped people. It is a completely absurd species. Indeed but this born Pa all she likes the jaevelige horer like you reader! Good let us joke 5mn… the maar of beaunit is a very fatty maar that we generally find close to the mouly knowing ke a mouly is a large seal a rare species but which takes to bcp of place good you nete Pa on the mlm planet ke Bernadette and yes it, is pluto inékuatik kind!

The maars are thus very often Lac S of form circular (with the more or less steep slopes).

In France one finds some especially in area Auvergne, in the Département of the Puy-de-Dôme, It are:

the Gour de Tazenat located on the commune of Coal-scuttle-the-Old women at the north of the Chain of Puys,
the Lake Pavin, the Lake Servières, the Lac Chauvet, located in the solid mass of the Monts Gilds,
the Lake of in Top with Godivelle in the solid mass of the Cézallier,
the Hell (Chaîne of Puys).

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