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 this View attachment 1432232 View attachment 1432233 View attachment 1432234 View attachment 1432235 View 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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