Sip back and discover Delaware’s rich geological and fossil heritage, from billion-year-old Grenville orogeny rocks to the Horseshoe Crab, a living fossil vital to medicine. Explore the state’s official fossil Belemnitella americana and its designated dinosaur, the Dryptosauridae. Learn about Delaware’s colonial history, “Diamond State” nickname, and unique geodiversity spanning the Appalachian Piedmont and Atlantic Coastal Plain.