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oai:docta.ucm.es:20.500.14352/1205042025-05-27T23:48:26Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc Hernández Pacheco, Alfredo author 1989 The Amanay Massif in the island of Fuerteventura is built up by a series of hypoabyssal subvolcanic alkaline rocks (ultramafics, gabbros and syenites) intruded by several basaltic dyke-swarms of regional extension. The ultramafic rocks form a Pyroxenite-Carbonatite Complex surrounded by the corresponding feldespatic net-work and associated fenites. The regional swarms of dykes, whose main structural trends are NNE-SSW, N-60-70º and N-115-120° seems to change gradual/y in the southern areas of the massif to lava sheets that mark the upper levels .of the formation. The last event in the area is represented by a few remanents of a formerly extenser coverture of horizontal lava flows that líe unconformabily over the dyke-swarm formation. 0213-683X https://hdl.handle.net/20.500.14352/120504 2173-6545 https://sociedadgeologica.org/publicaciones/geogaceta/geogaceta-6-1989/ Datos sobre la geología y petrología del Macizo de Amanay, Fuerteventura, Canarias