Caption
The Grand Canyon is a trough 6000 to 7000 feet deep, ten to twenty miles wide, hundreds of miles long, peopled with hundreds of peaks taller than any mountain east of the Rockies, and all ablaze with such color as no eastern or European landscape ever knew. And as you sit on the brink the Divine Scene-Shifter gives you a new canyon every hour; with each degree of the sun's course the great countersunk mountains fade away and new ones are carved by the westering shadows. The Canyon is not only the hugest but the most varied example on earth of one of the chief factors of earth building-erosion.