I thought that was the location of the Dragon burial Mounds; not the shrines on the top of mountains.
Either would be valuable, and by the time I did the MQ up to Delphine, I had the Shrines cleared out, which is why I thought of the rubbing thing. It is a stone, and we do have access to paper and charcoal early, it seems to make sense, but is missing as an option....
I guess if it is the burial mounds, it's pointless, since you rarely get the opportunity to catch them coming back to life there.