Surely some folk here are aware of the progressive evolution & development of symbols. There are plenty of CR designs on early crosses, where such imagery was probably adopted & plonked onto their designs. That's likely what's happened at Rowter. There's at least one Saxon cross less than 10 miles south of Rowter with a stylized cup-and-ring on its shaft. Why couldn't any recent carver have based his designs on that? As any good rock-art student knows, one needs to branch out a bit further and explore the evolution of symbols in early xtian religious iconography. We know that people were etching cup-marks on upright stones in Yorkshire in the 16th century, so I see little problem with some dood/s down Derbyshire doing the same, with a little additional flair!
Does the Rowter Rocks solar design really originate in prehistoric times? I very much doubt it. And whether Pastscape, Baza or anyone else thinks otherwise, they're probably wrong on this one. Soz...
Weirdly though, I think those on t'other side of this rocky mass, with the 3 CRs on top of the stone, are likely to be more ancient. Why? God knows! :)
Each to their own though innit, at least past scape don't change their opinions more often that their pants unlike some eminent archaeological "authorities". ; )