Scientific examination by actual geologists and paleontologists would put a lot of these questions to bed, though I somehow doubt serious scientific tests will ever take place.
some interesting segments from the article detailing Alvis Delk's miraculous (and financially convenient) discovery :
A domestic fall from a ladder eight months ago nearly crippled Delk, resulting in surgeries, a long recovery and expensive medical bills. He decided to try and sell some of his archeological treasurers, so he turned to the large piece of limestone, thinking he could clean it up some and sell it to the Creation Evidence Museum
Dr. Carl Baugh is the founder and director of the Creation Evidence Museum ... Baugh said the fossil is the proof he has been searching many years for. He acquired the stone from Delk and has it in safekeeping.
follow the money.
Sounds like a big scam to me. If it were truly authentic, they would have no problem releasing it to be tested by real scientists.
Follow the money!