Thanks guys.
Rich, I didn't use the Strata & Outcrops shader. The terracing/strata is defined by the greyscale image map shader placed in the displacement part of a surface shader, and using cylindrical projection in the image map shader. I've uploaded my tgd for this scene along with compressed versions of the colour and displacement images I used so you can see what's going on. As you'll see, in terms of the number of shaders used, it's a very simple scene.
I've also noticed that I have one too many syllables in the last line of my haiku. . . . . bother!
John
