Had to look at one of your links - this site is in Turkey. I don’t know, but the volcanic ash dated about the same time as the mural, along with the proximity of the similar shaped twin peaks of the mountains, it seems plausible to me.
The orange color of the mountains might be due to the recent deposits - or perhaps indicating fire? Or - how about red mountains from the sun shining through the ash in the sky? (Posting from smokey Seattle, with ash falling on everything at the moment, and a VERY red sky!)
I'm not as sanguine over the abilities of getting a tight date that is accurate from the volcano people. The classic "Gods, Graves, and Scholars" used to be the entree to archaeology for a lot of youngsters, and in its pages there's an interesting (true) story about a preColumbian temple and other ruins that were abandoned after getting partly or mostly buried by a lava flow. Perfect, thought the archaeologists, we'll get a date from the volcano people -- but they asked them to date the flow without telling them anything else. The figure came back at 9000 years. Well, the ruins are not 9000 years old. :^)