Rock-less

The reference, three days ago, to Helen's Reef, off Rockall, was incorrect - for this submerged feature is some two kilometres from the islet. It was an image of Hasselwood Rock, 200 metres to the north, and evident here to the right of the sheer face of Rockall and below in the turbulence. The skerry is, at low water, a metre above the surface and has a diameter of 13 metres. Its geological composition has apparently never been analysed for 'landings' have never taken place or specimens secured. Here's an ultimate geological challenge - for a piece of Hasselwood is rarer than that of the Moon.

Scottish Islands Explorer - Some back copies have become rare specimens