We have visited petroglyph sites in Nevada, Utah and Colorado and all of them appear, to my untrained eye, to be from different cultures. According to an archaeologist we know in the area they have no clue what any of them mean.
Some can be identified as to what they are, but not what they mean. Others are so foreign that the meaning is simply unknown.
The Indian cultures didn't use a written language like we do. All we know comes from translations by anthropologists that spoke with surviving tribal members who knew the oral histories of the tribes.
They don't know if it's a message or just teenager graffiti.
Duane
