Alpine marmots were introduced between 1980 and 1991 in the outskirts of Mont Mézenc, from the Gandoulet site. In 2011, more than 125 family groups were identified around this massif.
Description
These animals have acclimatized well and number 125 family groups, now spread over 23 municipalities.
Since 1988, more than 200 km2 have been observed each year, from April to September. Monitoring includes five counts per year for each family group and the census of new marmot settlements. A network of residents also contributes to the search for new facilities.
The analysis of the results of this monitoring will make it possible to specify whether this installation is moving towards a decline or towards an invasive process. In the long term, it will provide data for the study of possible allopatric speciation in the sense of Zecchini (2002).
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All year.
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This maar is a superb example of phreatomagmatic volcanic activity. The operation is characterized by an intense explosive activity caused by the meeting of the hot magma during the ascent with the waters infiltrated from the surface.
Sub-lacustrine volcano, the panorama of the cross opens on the needles of viscous lava of the surroundings of Borée. The walk towards the Cirque des Boutières will allow you to find the shape of the ancient volcano which occupied the site.
These are typical examples of viscous lava needles that have moved into place almost in a solid state. Here no craters but massive shapes in the landscape. Interpretation table between the two rocks.
The Rocher des Pradoux corresponds geologically to an isolated phonolite rock bar (phonolite is a volcanic rock).
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