Dry stane dyke

Today I went to the garden centre in the countryside for lunch with A and Tom.  I had looked at the abstract challenge before I left home and took my camera with me.  The topic was "form or shape" and I took this shot, which was lucky as the weather really deteriorated during the day and we had a curling match this evening and I didn't have an opportunity to look for another subject.
Thanks as always to Ingeborg for hosting