| *Field View High Resolution Image Age: Cretaceous Location: Empire Mountains Age: Early Cretaceous Formation: Upper Shellenberger Canyon | ![]() |
| Petrified Wood High Resolution Image Age: Cretaceous Location: Empire Mountains Age: Early Cretaceous Formation: Shellenberger Canyon | ![]() |
| Petrified Wood High Resolution Image Age: Cretaceous Location: Empire Mountains Age: Early Cretaceous Formation: Shellenberger Canyon | ![]() |
| Petrified Wood High Resolution Image Age: Cretaceous Location: Empire Mountains Age: Early Cretaceous Formation: Shellenberger Canyon | ![]() |
| Petrified Wood High Resolution Image Age: Cretaceous Location: Empire Mountains Age: Early Cretaceous Formation: Shellenberger Canyon | ![]() |
| Petrified Wood High Resolution Image Age: Cretaceous Location: Empire Mountains Age: Early Cretaceous Formation: Shellenberger Canyon | ![]() |
| Petrified Wood High Resolution Image Age: Cretaceous Location: Empire Mountains Age: Early Cretaceous Formation: Shellenberger Canyon | ![]() |
| Petrified Wood High Resolution Image Age: Cretaceous Location: Empire Mountains Age: Early Cretaceous Formation: Shellenberger Canyon | ![]() |
| Petrified Wood High Resolution Image Age: Cretaceous Location: Empire Mountains Age: Early Cretaceous Formation: Shellenberger Canyon | ![]() |
| Petrified Wood High Resolution Image Age: Cretaceous Location: Empire Mountains Age: Early Cretaceous Formation: Shellenberger Canyon | ![]() |
| Petrified Wood High Resolution Image Age: Cretaceous Location: Empire Mountains Age: Early Cretaceous Formation: Shellenberger Canyon | ![]() |
| Petrified Wood High Resolution Image Age: Cretaceous Location: Empire Mountains Age: Early Cretaceous Formation: Shellenberger Canyon | ![]() |
| Petrified Wood High Resolution Image Age: Cretaceous Location: Empire Mountains Age: Early Cretaceous Formation: Shellenberger Canyon | ![]() |
| Petrified Wood Impression High Resolution Image Age: Cretaceous Location: Empire Mountains Age: Early Cretaceous Formation: Shellenberger Canyon | ![]() |
| *Field View High Resolution Image Age: Cretaceous Location: Empire Mountains Age: Late Cretaceous Formation: Hilton Ranch Conglomerate | ![]() |
| Phylum: Mollusca Class: Bivalvia (Pelecypoda) Bivalve Packstone High Resolution Image Location: Empire Mountains Age: Early Cretaceous Formation: Shellenberger Canyon | ![]() |
| Phylum: Mollusca Class: Bivalvia (Pelecypoda) Bivalve Packstone High Resolution Image Location: Empire Mountains Age: Early Cretaceous Formation: Shellenberger Canyon | ![]() |
| Phylum: Mollusca Class: Gastropoda Gastropod Location: Empire Mountains Age: Early Cretaceous Formation: Shellenberger Canyon High Resolution Image | ![]() |
| *Field View High Resolution Image Age: Cretaceous Location: Empire Mountains Age: Early Cretaceous Formation: Apache Canyon | ![]() |
| *Field View High Resolution Image Age: Cretaceous Location: Empire Mountains Age: Early Cretaceous Formation: Apache Canyon | ![]() |
| Fossilized Algae Mats High Resolution Image Age: Cretaceous Location: Empire Mountains Age: Early Cretaceous Formation: Apache Canyon | ![]() |
* THE GEOLOGY OF THE EMPIRE MOUNTAINS AND VICINIT Y , PIMA COUNTY, ARIZONA - W W Tyrrell (1957).