Loségal dome, Le Pertuis, Saint-Julien-Chapteuil, Haute-Loire, Auvergne, France

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Mio-Pliocene phonolite dome (Mégal volcanos, Emblavez Tertiary basin).
Fumarolitic deposition (350-200°C) products in fracture plans and prismation of the dome.
Quarry near Le Pertuis village, along road D 35.

Ref.:
Bull. Soc. Franç. Minéralo. Cristallo. , 1974, 97, p. 494.

Mineral List:

Analcime

'Metahalloysite'

Thomsonite-Ca

3 entries listed. 2 valid minerals.

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