Markings? Visual clues?

[blackrose]

I see a lot of people making posts with pics of markings on rocks. Can someone help me understand how to interpret these markings? Is there a guide or legend i can use as a point of refference?

 

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[chlsbrns]

Check this thread out: http://www.treasurenet.com/forums/t...1075-treasure-marks-signs-diagnosed-here.html