We don’t need to study volcanic landforms to predict possible eruptions here in Northern Ireland. Well, at least not anymore, as it was 60 million years ago that this land mass was a volcano!

However, there are no known volcanic landforms in the immediate vicinity of Savonoski Crater and no signs of a magma source beneath the hole, according to the surveys from the 1960s and 1970s.

Rootless cones are small volcanic landforms ranging from several to several hundred meters in diameter, formed by continuous explosions resulting from the interaction between surface lava and ...