.bk A15 .fl L917okk1.j .fn field journal .ed L917 .ei okk .rd L917 .ri okk f 236 df st-is ds This feature is given to a set of stones for which we do not fully understand their function. They are large boulder-size stones which cover an irregular area of more than 5 metres. Some of them appear to be hewn, and others appear to be laid in a line. It is possibly that some of them represent the top of structures that we have yet to uncover, while others are fallen stones. C10 To fully uncover the surface, determine if there are any lines that match structures or installations. a 23 C10 Fully uncover structure a23 to its southernmost extent in k5.