Tag Archives: ammonites

Fossil display at National Museum of Natural History Smithsonian, National Mall, Washington, D.C. Ammonites Timeline: Jurassic / Cretaceous Period (256-65 Million years ago) Maximum size: 2.6 meters (8.5 feet) in diameter Predator advantage: tentacles, large beak Likely prey: Fishes, mollusks, … Continue reading →