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Fifteen new K-Ar ages in the range of 79-31Ma are partially confirmed by three 40 Ar/ 39 Ar plateaus and isochron data of 64.9+/-0.4, 55.5+/-0.1 and 52.8+/-0.6Ma. The new geochronological data reveal a much more detailed picture of the subduction imprint in the Hurd Peninsula. Using cutting relationships, the dyke emplacement history is divided into four episodes. The Late...