The fossil deposit of the Montâgne d'Andance, a freshwater maar, is located about 10 km southeast from Privas (Ardèche, France). It is an approximately 50 m thick layer of diatomaceous earth, which is now obtained by the company C.E.C.A. Diatomite in large-scale mining as a filtering agent.
Literature:
GERARD DEMARCQ, PIERRE MEIN, ROLAND BALLESIO et JEAN-PAUL ROMAGGI 1989. The locality of Andance (Coiron, Ardeche, France) in the Upper Miocene of Rhone valley : tentative marine/non marine correlations. Bull. Soc. geol. France, 1989, (8), t. V, no 4, pp. 797-806.
M. L'abbé Boulay (1887) Notice Sur La Flore Tertiaire Des Environs De Privas (Ardèche), Bulletin de la Société Botanique de France, 34:6, 255-279, DOI: 10.1080/00378941.1887.10830251
Hans Steur 1989. De fossiele flora en fauna van St.Bauzile. Grondboor en Hamer, jrg. 43, no. 1, p. 11-15, 9 fig., februari 1989
Tanrattana M., Boura A., Jacques F. M. B., Villier L., Fournier F., Enguehard A., Cardonnet S., Voland G., Garcia A., Chaouch S. & De Franceschi D. 2020. — Climatic evolution in Western Europe during the Cenozoic: insights from historical collections using leaf physiognomy. Geodiversitas 42 (11): 151-174.