The finds of kimberlite dikes and veins which tend to strike towards a centre, and the finds of angular breccia boulders in the same area suggest a new centre of volcanic activity within the Åvike Bay region, situated approximately 15 kilometres east of the wellknown Alnö district in Sweden. The volcanism of the two areas are probably related to each other. However, the rocks of Åvike seem to be more kimberlitic in character and appear to be younger than those of the Alnö region.