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Around 100 million years ago, several thrust plates pushed up out of an ancient sea and created the foundation of the Spring Mountains. That rupture lifted limestone from roughly 300 million years ago into the sky, forming what Dr. Steve Rowland from UNLV calls “a classic Monte Cristo formation.”
The limestone on these sheer faces of Mummy Mountain is full of fossils from a world older than the dinosaurs. All of that limestone we hike across and climb on was made from the remains of marine creatures that lived so deep in old earth’s time that the mountains themselves had not yet been imagined.




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