Montagnes Noires

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The Montagnes Noires (French: 'the black mountains'), also known as the Montagne Noire (French: 'the black mountain')[1] and in Breton as Menez Du[2] are an east-west oriented range of hills in Brittany centred on the town of Gourin. They culminate in the peak of Roc de Toullaeron (Breton: Roc'h Toull-al-Laeron) which attains a height of either 318m[3] or 326m.[4] Other significant peaks include Ar Menez (304m) and Montagne Noir (307m) (or, in Breton: Menez Du).[5] They are composed from a range of Precambrian, Ordovician, Silurian and Devonian rocks forming a part of the Variscan orogen and include sandstones, quartzites and slates.[6]

The hills form a part of the border between the départements of Finistère and Morbihan and just extend into Côtes-du-Nord.

References

  1. Carte Geologique de la France, 1:1,000,000 scale, 5th edn, Bureau de Recherches Geologiques et Minieres
  2. http://www.geobreizh.com/breizh/bre/kartenn-douaroniezh.asp
  3. http://www.geobreizh.com/breizh/fra/chiffres-monts.asp
  4. Collins Road Atlas France 1988, based on IGN mapping 1988
  5. http://www.geobreizh.com/breizh/fra/carte-geographie.asp
  6. Carte Geologique de la France, 1:1,000,000 scale, 5th edn, Bureau de Recherches Geologiques et Minieres

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