zoomed to do a pieced together pano of this row of HooDoos. Of course, clicking on Original below makes for better viewing.

The hoodoos at Bryce Canyon are carved in the Claron Formation. Limestone, siltstone,dolomite and mudstonemake up the four different rock types that form the Claron Formation. Each rock type erodes at different rates. The rock's resistance to erosion is what causes the undulating shapes of the hoodoos.