rockabilly

yep, absolutely it is a petroglyph thanks to mr. wren... thank about it, in 5 thousand years it will be an ancient petroglyph and no one will know what it means. english will have disappeared and it will not be readable. it will become a sacred symbol and a whole race of religious fanatics will gather there to worship it. they will be called the wruids.

By definition it certainly is a petroglyph . When you consider that Frederick Baker thought that the Red Army graffiti in the Reichstag , Berlin was rock art and wrote a paper on it CW's effort effort will slot nicely into the canon .