The Grand Som is a mountain of the Chartreuse Mountains in the French Prealps, in Isère, France. It has a long ridge, unevenly sharp, overlooking the Petit Som (1,772m), the Col de la Ruchère northwest and the Grande Chartreuse monastery below the cliffs. The summit has a cross and two relief tables. It lies in the Parc Naturel Régional de la Chartreuse.

Grand Som
The Grand Som from the Charmant Som.
Highest point
Elevation2,026 m (6,647 ft)
Prominence887 m (2,910 ft)[1]
Coordinates45°22′14″N 05°48′43″E / 45.37056°N 5.81194°E / 45.37056; 5.81194
Geography
Grand Som is located in Alps
Grand Som
Grand Som
Location in the Alps
LocationIsère, France
Parent rangeChartreuse Mountains

Caving

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Many chasms are present on the massif: Trou Lisse à Combonne (−303 m), puits de l'Écho (−396 m), gouffre Roland (−481 m), gouffre de Mauvernay (−507 m), gouffre des Aures (−512 m), , but the most important network is the puits Francis (1,565 m) or Réseau de Bovinant [fr] of 723 meters deep for 6,836 m of development. Discovered in July 1966 by the caving club of La Tronche (FLT), the siphon at (−688 m) was reached on August 23, 1967. Upper entries were then found.[2]

 
View from the col de la Ruchère to the Petit Som (1,772 metres (5,814 ft), on the left) and the summit of the Grand Som (on the right).

References

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  1. ^ "Grand Som - peakbagger". peakbagger.com. Retrieved 4 February 2015.
  2. ^ Jean-Jacques Delannoy; Richard Maire (1984). "Les grandes cavités alpines. Répartition et contexte hydrogéologique". revue Karstologia (in French). p. 63-64. Retrieved 2017-06-13..