Fire on the Horizon

Taken prior to sunrise at Dunbar on the East Coast. While I was struggling to find anything useful for a foreground I noticed a band of colour on the horizon.

I used a longer focal length to isolate a cluster of rocks and was intrigued by the various bands of interest from bottom to top.

Canon 40D and 70-200 f/4L:
f/16 | 81mm | 3.2sec | ISO-100 | Lee 0.9 ND filter and Lee 0.9 ND Grad (Hard)