Fascinating graphic. I notice this geology in many of your mountain images. Is this dolomite? This kind of image with alot of white about the edges displays poorly on Summitpost's default white background.
Do you have Photoshop skills? You might edit the image in Photoshop and add a border increasing the canvas size to 1100x850 pixels. Black would work but #323445 is better (HSB 233-27-27)