Abstract
Palaeomagnetic investigations of the lava flows in two profiles on the island of Sao Antão are presented. It is concluded that the ca. 290 m Cha de Morte-Profile is dominantly of reverse polarity, equivalent to a Lower Matuyama age (between 2.1 and 2.6 Ma). The slightly older Escabecada Profile, covering 15 lava flows, ca. 110m, shows reverse polarity in the top flows, and a dominant normal polarity in the lower flows, suggesting an age between 2.5 to 3 Ma, equivalent to the older part of Matuyama and the younger part of Gauss (marine chron C2An.1n). A minimum eruption frequency of the lava flows in the Escabecada Profile, equivalent to one flow every 15.0 ± ca. 5 Ka, is suggested.
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