November 5, 2010
New evidence suggests that the river that started carving the Grand Canyon once flowed north into Utah, until the south-flowing Colorado River captured it.
Stories this photo appears in:
Geologists debate the age of the planet’s deepest canyon, with the answer to ancient riddles hanging in the balance
So I’m sitting on a river-smoothed swirl of Vishnu Schist in the bottom of the Grand Canyon trying to reset my imagination as the Colorado River roars past.