Tall tree trunk striped by shadows

I took this one quite a while ago - May 2013 - at Hardcastle Crags. No idea what type of tree this is but it stood out from the others around it for being so tall, with branches only at the top, and looking like its trunk was stripy, due to the shadows cast across it from other trees around.

Camera/lens settings: ISO 100, f/3.5, 1/200s, 18mm, hand held.