Roche des Poignards (Upper Ubaye Valley, France)
There appears to be some potential damage from a varnish like substance running down this panel. This is the darker streaking. I am not sure about the source of this at present.
This is a collection of fairly random images and notes about Alpine rock art sites that I come across on my travels. You can see about my work in the Alps on my main website: www.trustrameve.com