in Australia, a stone similar to a petrified book with a metal binding was found

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At a depth of 12 meters in Australia, a stone similar to a petrified book with a metal binding was found
During excavations in Australia at a depth of 12 meters, archaeologists discovered a stone shaped like a closed book.
The object amazed even experts - its "pages" were mineralized, and the binding, according to researchers, was made of a metal alloy.
Professor Jane Balme admitted: at first she thought it was a joke.
But the find turned out to be real. However, the question remains - how could such an artifact have appeared hundreds of millions of years ago? Science has not yet provided an answer.