I disagree about it doing no good to challenge some theories though, sometimes just having the challenge on record is enough even if the challenge was not successful. It's a funny thing about evidence and facts, people may willfully ignore, marginalize, or falsely interpret them, but eventually someone will come along with an open mind and set the record straight.
You should report the rocks to the closest University. There are tons of cases of things found in University collections that weren't understood or purposely miscategorized when they were discovered which were later reinterpreted.
There are also tons of discoveries mouldering in forgotten back rooms because the evidence doesn't fit. :)
Every case I've ever seen of human prints found in rock got the same treatment-scepticism followed by outright disbelief.