|Following recent discoveries I have made on the North Yorkshire Moors and information I have received from Graeme Chappell, I think these marks are not prehistoric cups but marks left by bullets. Apparently standing stones were used for target practice during World War 2. Further evidence for this on this particular stone is that the 'cup' has damaged the carving of the date which would imply that the cup is younger than the date carving. The close proximety of an army training ground would also support this.
Posted by fitzcoraldo
1st April 2003ce