Help with quest: A Piece of History

So I started doing this quest, and I managed to find 2 or the mining nodes for it, but the 3rd one proves ever elusive.

I'm stuck at the one that's next to Camp Horizon. I've scouted every rock formation I could see around the area, and I know the yellow circle doesn't give an exact location (Because the 1st node I managed to find was outside of the circle) but I just can't find it (I can't find ANY), and I'm not entirely sure what lvl prospect is necessary for this quest.

I even went to the DoL website to see where the nodes were in that spot, and none are available for mining.

Please help, what do I do? D: Is my only choice to wait for a node to pop up on that particular rock formation? How long does it take for that to happen, anyway?

I don't know if this will help you, but this site is usually where I turn to:

http://ffxiv.gamerescape.com/wiki/A_Piece_of_History

OMG! Thank you! That actually did help! XD