Bryce Canyon was not formed from erosion initiated from a central stream, meaning it technically is not a canyon. Instead headward erosion has excavated large amphitheater-shaped features in the Cenozoic-aged rocks of the Paunsaugunt Plateau. This erosion exposed delicate and colorful pinnacles called hoodoos that are up to high. A series of amphitheaters extends more than north-to-south within the park. The largest is Bryce Amphitheater, which is long, wide and deep. A nearby example of amphitheaters with hoodoos in the same formation but at a higher elevation, is in Cedar Breaks National Monument, which is to the west on the Markagunt Plateau.