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Like that one, definitely art even if it's not made by humans :)
That settles it, cheers. Have looked at all your non rock art images and as soon as I am able to I shall take my Wren's Egg images. Plough. Fair enough. Still good to look at even if to show the consequences of an over-active imagination : ) You are right to have these images up for reference.
TSC .pretty arty nature innit .
S. Dunno if you saw the others , i.e. those that were up from earlier ,more like the usual RA .Click on the "non rock art " bit to access them .
Some of these later ones probably manmade i.e. with a plough but it doesn't explain all of them .
I only thought a plough was a possible explanation for Monreith , hence the question mark after it .It might have a geological one .