Sunset Point offers vistas of some of the most famous and breathtaking of Bryce Canyon's hoodoos. Directly below the point and to the south, the Silent City rises from the canyon floor, a maze of hoodoos and fins packed in tight formation.

Nowhere are the colors of Bryce Canyon's rock better displayed than from Sunset Point. Called the Claron Formation, this unique rock is primarily composed of limestone deposited approximately 50 million years ago in a large freshwater lake, known to geologists as Lake Claron. Iron oxide minerals supply the vibrant red, oranges, and yellows of the lower half of the cliffs which geologists call the Pink Member. As its geologic names suggest, here too patches of pink and purple caused by manganese oxides add to the rainbow of color. The change from orange to white marks the beginning of the Upper Member. This section of limestone is purer; its lack of color is caused by the absence of mineral impurities.

http://www.nps.gov/brca/planyourvisit/sunset.htm