Abstract
The palaeomagnetic study of Siluro-Devonian redbeds of the San Pedro formation, at Cabrillanes, Asturias, Spain, reveals a high temperature and pre-tectonic magnetization determined by intersection of great circles as well as conventional averaging (Fisher). This magnetization is carried by the haematitic pigment and is therefore of chemical and post- depositional origin. The formation mean direction (D=113°, I=+34°, α95=10°) is interpreted as representing a record of a Devonian palaeofield. The corresponding pole after correction for the opening of the Bay of Biscay and the tectonic closure of the Ibero-Armorican arc is in good agreement with contemporaneous European poles, confirming that the Armorica plate had already joined the Laurentia-Baltica assembly at that time.
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