Field Photos of Bivalves
| Phylum: Mollusca Class: Bivalvia (Pelecypoda) Bivalve High Resolution Image Location: Near Sonoita Arizona Age: Early Cretaceous Formation: Mural Limestone |  |
| Phylum: Mollusca Class: Bivalvia (Pelecypoda) Bivalve High Resolution Image Location: Near Sonoita Arizona Age: Early Cretaceous Formation: Mural Limestone |  |
| Phylum: Mollusca Class: Bivalvia (Pelecypoda) Bivalve High Resolution Image Location: Near Sonoita Arizona Age: Early Cretaceous Formation: Mural Limestone |  |
Phylum: Mollusca Class: Bivalvia (Pelecypoda) Bivalve High Resolution Image Location: Near Sonoita Arizona Age: Early Cretaceous Formation: Mural Limestone |  |
| Phylum: Mollusca Class: Bivalvia (Pelecypoda) Assorted Bivalves High Resolution image Location: Near Benson Az. Age: Early Cretaceous Formation: Mural Limestone |  |
| Phylum: Mollusca Class: Bivalvia (Pelecypoda) Assorted Bivalves High Resolution image Location: Near Benson Az. Age: Early Cretaceous Formation: Mural Limestone |  |
| Phylum: Mollusca Class: Bivalvia (Pelecypoda) Genus: Trigonia Trigonia Bivalve (in matrix) High Resolution Image Location: Near Sonoita Arizona Age: Early Cretaceous Formation: Mural Limestone |  |
| Phylum: Mollusca Class: Bivalvia (Pelecypoda) Coquina Mixed Broken Shells Location: Tucson Mountains Age: Early Cretaceous Formation: Amole Arkose |  |
| Phylum: Mollusca Class: Bivalvia (Pelecypoda) Coquina Mixed Broken Shells Location: Tucson Mountains Age: Early Cretaceous Formation: Amole Arkose |  |
| Phylum: Mollusca Class: Bivalvia (Pelecypoda) Bivalve Location: Near Sonoita Arizona Age: Early Cretaceous Formation: Mural Limestone |  |
| Phylum: Mollusca Class: Bivalvia (Pelecypoda) Order: Pteroidea Family: Ostreidae Oyster Location: Near Sonoita Arizona Age: Early Cretaceous Formation: Mural Limestone |  |
| Phylum: Mollusca Class: Bivalvia (Pelecypoda) Order: Pteroidea Family: Ostreidae Oyster Location: Near Sonoita Arizona Age: Early Cretaceous Formation: Mural Limestone |  |
| Phylum: Mollusca Class: Bivalvia (Pelecypoda) Bivalve Mollusk (cross section) and what appears to be associated trace fossils Pelecypod is about 1". Location: Near Tucson Az. Age: Early Cretaceous Formation: Amole Arkose |  |
| Phylum: Mollusca Class: Bivalvia (Pelecypoda) Coquina Mixed Broken Shells Location: Tucson Mountains Age: Early Cretaceous Formation: Amole Arkose |  |
| Phylum: Mollusca Class: Bivalvia Bivalve mollusk Fossil is about 3/4 inch long. Location: Near Tucson Az. Age: Early Cretaceous Formation: Amole Arkose |  |
| Phylum: Mollusca Class: Bivalvia (Pelecypoda) This Pelecypod is from the Amole Arkose (Bisbee equivalent) in the Tucson mountains. Fossil is about 1/4 inch long. |  |