Signs and symbols

[suberdave]

Hello, I was metal detecting today in Elysian Park CA and was walking past some rock outposts. I was hoping to find some old markings or graffiti. I came upon thisView attachment 1432232View attachment 1432233View attachment 1432234View attachment 1432235View attachment 1432236. Ok the triangle with the arrow pointing looks kind of old. The skull does not look old. Not sure about the other markings. Any thought would be wonderful, thank you. Dave

 

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