PF, you are indeed warm. We passed within about 30 nm of Clifton Hills, but it should have been out the righthand window and that pic looks to have been taken out the left ..... and the watercourse is wrong for Clifton Hills.
I had to go home to get some papers so I had a look at the snail trail on the eWACs. I can see nothing on WACs between Coober Pedy and Birdsville that could be what is in that pic.
Dr 