| Plant Stem High Resolution Image Location: Tucson Mountains Age: Early Cretaceous Formation: Amole Arkose |  |
| Phylum: Mollusca Class: Bivalvia (Pelecypoda) Coquina Mixed Broken Shells High Resolution Image Location: Tucson Mountains Age: Early Cretaceous Formation: Amole Arkose |  |
| Phylum: Mollusca Class: Bivalvia (Pelecypoda) Coquina Mixed Broken Shells High Resolution Image Location: Tucson Mountains Age: Early Cretaceous Formation: Amole Arkose |  |
| Phylum: Mollusca Class: Bivalvia (Pelecypoda) Coquina Mixed Broken Shells High Resolution Image Location: Tucson Mountains Age: Early Cretaceous Formation: Amole Arkose |  |
| Phylum: Brachiopoda Class: Articulata Order: Spiriferidea Spiriferid Valve with hinge Age: Pennsylvanian Formation: Horquilla Limestone High Resosution Image |  |
| Phylum: Brachiopoda Class: Articulata Order: Spiriferidea Spiriferid Brachiopod Age: Pennsylvanian Formation: Horquilla Limestone High Resosution Image |  |
| Phylum: Brachiopoda Class: Articulata Order: Spiriferidea Spiriferid Brachiopod Age: Pennsylvanian Formation: Horquilla Limestone High Resosution Image |  |
| Phylum: Bryozoa Branching Bryozoa Age: Pennsylvanian Formation: Horquilla Limestone High Resosution Image |  |
| Phylum: Cnidaria Class: Anthozoa Subclass: Zoantharia Order: Rugosa Horn Coral High Resolution Image Location: Tucson Mountains. Age: Pennsylvanian Formation: Horquilla Limstone |  |