Fossil Hunting in Alabama

Alabama is an underappreciated gem in the fossil collecting world. The state’s Coastal Plain stretches from the Tennessee Valley to the Gulf of Mexico, exposing a thick sequence of Cretaceous and Eocene marine sediments that have produced everything from mosasaurs and plesiosaurs to exquisitely preserved seashells.

Why Alabama?

Alabama’s geological story is one of ancient seas advancing and retreating across the southern landscape. During the Late Cretaceous (roughly 70-85 million years ago), much of Alabama was submerged beneath the warm waters of the Gulf Coastal Plain seaway. The chalk formations deposited during this time — the Mooreville Chalk and Demopolis Chalk — are equivalent to the famous chalk of Kansas and Texas, and they have produced world-class marine reptile fossils.

Later, during the Eocene (around 40-50 million years ago), the sea returned, depositing shell-rich sands and clays that now line the banks of the Alabama, Tombigbee, and Warrior rivers. The Claiborne Bluff locality has been a landmark in American paleontology since the 1830s.

What makes Alabama special for collectors is the combination of productive formations, active fossil clubs, and relatively uncrowded sites. The Alabama Paleontological Society operates organized collecting events at several sites, giving collectors supervised access to outstanding material.

What You’ll Find

Cretaceous marine fossils (~70-85 million years old):

• Oysters — Massive Exogyra and Pycnodonte shells, often beautifully preserved
• Shark teeth — Squalicorax, Scapanorhynchus, and others
• Ammonites — Baculites (straight-shelled) and coiled forms
• Mosasaur bones and teeth — Found in chalk exposures (report significant finds)
• Fish vertebrae — Common in creek gravel

Eocene marine fossils (~40-50 million years old):

• Gastropods — Stunning turritella towers, moon snails, and whelks
• Bivalves — Scallops, clams, and oysters with original shell material
• Echinoids — Sea urchin tests, occasionally very well preserved
• Shark teeth — Various Eocene species
• Nummulites — Large foraminifera visible to the naked eye

Pennsylvanian fossils (~310 million years old, northern Alabama):

• Trackways — Amphibian, reptile, and insect traces at the Minkin Site
• Plant fossils — Fern fronds, lycopsid bark, seed ferns
• Insect impressions — Rare and scientifically valuable

Best Time to Visit

• Fall (September-November): Lower water levels on rivers and creeks expose bluffs and gravel bars
• Late winter (February-March): Post-winter erosion reveals fresh material before spring vegetation fills in
• After storms: Creek levels drop and leave behind concentrated fossil gravel
• Avoid midsummer: Alabama heat and humidity are intense, and vegetation can obscure sites

Tips for Alabama Collecting

1. Join the Alabama Paleontological Society — they operate the best sites in the state and organize regular collecting events
2. Check river levels before visiting bluff sites — the Alabama and Tombigbee rivers fluctuate significantly; low water exposes the best collecting areas
3. Bring insect repellent — mosquitoes and ticks are abundant near water in warm months
4. Carry a screen or sieve — sifting creek gravel is the most efficient way to find shark teeth and small fossils
5. Watch for snakes — cottonmouths are common near Alabama waterways; watch where you step and reach
6. Learn your chalks — the Mooreville and Demopolis Chalks look similar but contain different fauna; geological maps from the GSA help identify what you are collecting from
7. Visit the Alabama Museum of Natural History — the Tuscaloosa campus houses a superb collection, including the state’s famous mosasaur and whale fossils

Collecting Sites

Legal Rules for Alabama

Key Geological Formations

• Mooreville Chalk (Upper Cretaceous)
• Demopolis Chalk (Upper Cretaceous)
• Ripley Formation (Upper Cretaceous)
• Gosport Sand (Middle Eocene)
• Lisbon Formation (Middle Eocene)

Local Fossil Clubs & Museums

• Alabama Paleontological Society
• Birmingham Paleontological Society
• Alabama Museum of Natural History
• Geological Survey of Alabama