Crosses ans a triangle on rocks,what does it mean?

[Trhu]

Crosses on rocks,what does it mean?

Hello every one,i have found these symbols on some rocks near my home but I didn't know what they refer,knowing that I live in Algeria,can Simone help me solve this mystery.



here are the photos​

 

[jeff of pa]

Welcome Your thread was moved to

• Treasure Marks/Signs

where it is more appropriate.
and may attract the Right members.

listing your location may help also