A number of samples have been dredged from the upper parts of Amanay and El Banquete Seamounts, yet volcanicudmaterials have been collected only in Amanay. Based on the textural features and the presence or absence ofudkaersutite, two main types of olivine pyroxene basaltic rocks have been identified. From a compositional pointudof view, they are basanites with high enrichment in the most incompatible elements, similar to that displayed byudOcean Island Basalts. Samples from Amanay seamount would have been formed due to a low degree of meltingudof an enriched mantle, very similar to that which probably caused the Miocene volcanic activity of Fuerteventura.udThe age of Amanay volcanic rocks, 15.3 ± 0.4 and 13.1 ± 0.3 Ma, is similar to those of the old volcanic unitsudexposed in the nearby islands (Gran Canaria, Fuerteventura and Lanzarote). This proves the formation of a separateudsubmarine volcanic edifice coeval with the other edifices of the Eastern Canarian Volcanic Ridge. Volcanic activityudon the submarine edifice is thought to have ceased at about 13 Ma, simultaneous with the adjacent main volcanicudconstruction.
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