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Al Naslaa rock: Saudi Arabia's enigmatic sandstone block that's split perfectly down the middleThe Al Naslaa Rock Formation is a landmark in the Saudi Arabian desert formed of two big blocks of sandstone separated by a mysterious, pencil-thin gap. The gap is almost perfectly straight and ...
CALIFORNIA — If you are a "rock nerd" living in California or just love learning about geology, we've found some of the most ...
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