| *The Bolsa Quartzite is a thin to medium bedded red to dark red sandstone. The bedding planes often weather out into picturesque patterns. | 
|
| *Source: Southern Arizona Guidebook Three available from the Arizona Geological Society. | |
| *The Bolsa Quartzite is a thin to medium bedded red to dark red sandstone. The bedding planes often weather out into picturesque patterns. |
|
| *Source: Southern Arizona Guidebook Three available from the Arizona Geological Society. | |