25 avril 2017
Grotte du Nant de Rossanne
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Mardi 25 Avril 2017 Participants: Patrice et Yann Petite visite de la Grotte du Nant de Rossanne qui est un exutoire temporaire de la résurgence occidentale du mont Colombier. (carte approximative : http://www.coordonneesgps.net/point-gps/carte-11565...
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