The emplacement of basaltic sills and dykes outcropping in the Cinco Villas Massif (Western Pyrenees), northwards of the North-pyrenean fault, was controled by the hercynian main-phase cleavage (dykes) and by the orientation of three small half-graben permian basins (sills), unconformably overlain by the Buntsandstein conglomerates. Both types of magmatism are cogenetic and coeval
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