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Sur l'age Tithonien-Berriasien du lithostratotype de la Formation Magura (anticlinal de Belogradchik, Prebalkan Occidental): implications paleogeographiques


, : Sur l'age Tithonien-Berriasien du lithostratotype de la Formation Magura (anticlinal de Belogradchik, Prebalkan Occidental): implications paleogeographiques. Geologica Balcanica 31(3-4): 37-47

In the Western Fore-Balkan, micropaleontologic assemblages (Calpionellids, benthic Foraminifera, Algae) observed within the lithostratotype of the Magura Formation (Magura cave - Rabisha hill, Northern limb of the Belogradchik anticline) evidence its Late Tithonian and Berriasian (Early to Middle) age. This formation can be regarded as a lateral tongue (more or less reefal) of the lower part of the Makresh Formation, described in the well R-1, situated more the North, close to the village of Makresh on the Moesian Platform. Magura Formation is also older than the "urgonian"-type massive limestones, Barremian in age, from the Oreshets-Rouzhintsi area (SE), previously included in the same formation, which must be rather correlated to the Simeonovo Formation, more the North, and the Banitsa tongue, first unit of the Vratsa Urgonian Group cropping out to the South-East.

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