| Petrified Wood Scale is 6" High Resosution Image Location: Tucson Mountains Age: Early Cretaceous Formation: Amole Arkose |  |
| Petrified Wood Location: Tucson Mountains Age: Early Cretaceous Formation: Amole Arkose |  |
| Petrified Wood Location: Tucson Mountains Age: Early Cretaceous Formation: Amole Arkose |  |
| Phylum: Bryozoa Branching Bryozoa Location: Tucson Mountains. Age: Pennsylvanian Formation: Horquilla Limstone |  |
| Phylum: Brachiopoda Class: Articulata Order: Strophomenidina Suborder: Productid Location: Tucson Mountains. Age: Mid to late Permian Formation: Concha |  |
| Phylum: Brachiopoda Class: Articulata Order: Strophomenidina Suborder: Productid Location: Tucson Mountains. Age: Mid to late Permian Formation: Concha |  |
| Phylum: Brachiopoda Class: Articulata Order: Strophomenidina Suborder: Productid Location: Tucson Mountains. Age: Mid to late Permian Formation: Concha |  |
| Gastropod Location: Tucson Mountains Age: Mid to late Permian Formation: Concha |  |
| Gastropod Location: Tucson Mountains Age: Mid to late Permian Formation: Concha |  |
| Gastropod Location: Tucson Mountains Age: Mid to late Permian Formation: Concha |  |
| Gastropod Location: Tucson Mountains Age: Mid to late Permian Formation: Concha |  |