Iceland - sketch 1

I am working on sketches towards a finished Oil Pastel painting of ice flows in Iceland. I haven't been there, but they are based on photos taken by a family member.

First sketch - 11x7in Reeves and Sennelier OPs on sketchbook paper. I like the water, but think the ice needs more work, and the composition needs changing to include less mid-ground ice, more sky, and maybe a bit more water.

Please do let me know what you think, as I need some advice!