Abstract
Abstract A previously unsuspected series of volcanics has been discovered on the southeastern flank of the Montagne Noire in southern France. The lower Arenig-upper Tremadoc beds (Ordovician) are overlain successively by a lower pyroclastic series, andesitic porphyrite, and an upper detrital volcanic series. The volcanics are overlain by Devonian and Caradoc (Ordovician) strata of the Cabrieres nappe. The age of the volcanics is middle Arenig to Llandeilian (Ordovician).
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