File:Costabonne depuis Roc Colom.jpg

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Français : Vue vers le sommet de Costabonne, depuis le nord-ouest (Roc Colom). Le sentier qui descend de Costabonne passe la source du Tech. La majeure partie de la zone de l'image se trouve sur le "granit de Costabonne" hercynien. Mais le sommet de Costabonne lui-même se trouve sur des sédiments métamorphosés édiacariens plus anciens ("Gneiss à silicates calciques").

Voir : B. Laumonier et al., Notice explicative de la feuille Prats-de-Mollo-La-preste (1099) à 1/50 000, BRGM Éditions, Orléans, 2015, pages 21 et 23, ficheinfoterre.brgm.fr.

Les roches au premier plan immédiat se trouvent sur un important filon de quartz, qui s'étend vers l'est, jusqu'aux Esquerdes de Rotjà.
English: View towards the summit of Costabonne, from the northwest (Roc Colom). The path leading down from Costabonne passes the source of the Tech river. Most of the area in the image is on Hercynian "Costabonne granite". But the Costabonne summit itself is on older, Ediacaran, metamorphosed sediments (Gneiss à silicates calciques). The rocks in the immediate foreground mark the line of a large quartz vein, which extends eastwards to the Esquerdes de Rotjà.

Carte topographique sur Géoportail.

Carte géologique sur Géoportail.
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Author Alan Mattingly

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