63-40 million years ago: Iron- and lime-rich sediments flowing from highlands sink into remaining lakes, forming the pink cliffs of Bryce.
More Top Picks Best Cold Plunge Tubs Under 5000 Dollars
13 million years ago: Land gradually rises in southern Utah and northern Arizona.
10 million years ago: Huge north-south fault develops as earth pulls apart and pressure from uplift divides the land into massive plateaus.
10 million years ago to present: Uplift makes rivers run at great strength, scrubbing away rock, forming canyons and eating at tablelands.