So now there are two camps of the "portable rock art" folks.
1. The original group that thinks that every odd shaped rock that they find is some small, hand held, sculpture that is usually several different animals according to how you hold it...even if some of those "animals" are a little lop-sided. These folks will come on here and pretend to ask for opinions on their "effigy", and when all the life long artifact collectors chime in and tell them that it is just a weathered rock, or a rock with fossil inclusions, they freak out, and begin to explain to all of us "uneducated" folks that it is a very important find and the local professor/archeologist/museum janitor/tribal elder has confirmed that fact. (if anyone confirmed it, there is a good chance they just wanted to be agreeable, and not get stabbed in the face.)
These folks think that their "artifact" is waaaaaay older than "anything any of you have ever seen", and that's why we don't recognize them as artifacts. Some even claim that they are millions of years old. So I guess that these ancient people had so much free time on their hands while trying to survive being eaten by a dinosaur, or trying to figure out how to swallow a T-rex (Answer: one bite at a time), that they sat around making crappy, lop-sided, miniature statues that look like four different animals from the future.
2. The second group thinks that every odd shaped rock or fossil inclusion is some sort of treasure map, or treasure sign. There is no shortage of "stone maps" (I've even seen a shell map) that you can google....and it is lost on these folks that those maps...whether real or fake...are at least VERY legible, and there is no mistaking that they are human made carvings, and no mistaking what was carved on them (images, not their meanings).
I don't doubt that there were/are treasure signs that were actually carved on rocks and trees and whatever, but I seriously doubt that they were so small that you could loose them...I would think that they would be put on something that you would want to be able to find when you came back to the area...or...they would be put onto an outright map that you could fold up and put in your pocket (and yeah...I know that a small rock could fit in your pocket). So...someone carves a lion with a hat and a bear on his chin...and somehow THAT tells you where to find a treasure? Sure.
I have to wonder if the "portable rock art" folks have ever seen a rock that wasn't an artifact or a treasure map?