Grand Staircase
The rocks exposed in Bryce Canyon are about 100 million years younger than those in nearby Zion National Park, and the rocks exposed in Zion are younger than those in the Grand Canyon to the south.
There are, however, shared rock units between all three, creating a supersequence of formations that geologists call the Grand Staircase. Together the formations of the Grand Staircase record nearly 2000 million years of the Earth's history. Bryce Canyon's formations are the youngest known units in the Grand Staircase. Younger rock units, if they ever existed, have been removed by erosion.
Read more about this topic: Geology Of The Bryce Canyon Area
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—Friedrich Nietzsche (1844–1900)