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Fossil Hunting in Mississippi

intermediate friendly Petrified woodShark teethBivalves and gastropodsEchinoidsForaminifera

Mississippi may not be the first state that comes to mind for fossil collecting, but its Gulf Coastal Plain geology holds a rich record of Cretaceous through Oligocene marine life. Add in some of the finest petrified wood in the southeastern United States and you have a state well worth exploring.

Why Mississippi?

Mississippi’s bedrock is almost entirely Gulf Coastal Plain sediment, a thick sequence of marine and nearshore deposits laid down over the last 100 million years. As rivers and road construction cut through these soft sediments, they expose fossil-bearing layers that are often easy to work with basic tools or even bare hands.

The state also sits along the important Eocene-Oligocene boundary, and several of its exposures are internationally significant reference sections for this time period.

What You’ll Find

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

  • Bivalves and gastropods — Oysters, clams, and snails from the Selma Chalk
  • Echinoids — Sea urchins preserved in chalk
  • Shark teeth — Scattered through Cretaceous marine beds
  • Ammonite fragments — Occasionally found in Upper Cretaceous exposures
  • Mosasaur remains — Rare but documented from the Selma Group

Eocene-Oligocene marine fossils (~30-40 million years old):

  • Foraminifera — Microfossils abundant in many formations
  • Bivalves and gastropods — Well-preserved shells in the Vicksburg Group
  • Corals and bryozoans — Colonial organisms from warm shallow seas
  • Shark teeth — Multiple species from Eocene nearshore deposits

Petrified wood (Oligocene, ~36 million years old):

  • Silicified logs and fragments, some with excellent cellular preservation

Best Time to Visit

  • Late fall and winter (October-February): Lower vegetation makes bluff exposures more accessible and reduces insect pressure
  • After heavy rain: Erosion on bluffs and in gullies exposes fresh material
  • Spring: Good conditions but increasing heat and humidity as the season progresses

Tips for Mississippi Collecting

  1. Bring insect repellent — Mississippi’s warm climate means ticks and mosquitoes are a serious consideration during warmer months
  2. Watch for unstable bluffs — Coastal Plain sediments are soft and bluff faces can slump without warning; collect from talus slopes rather than undercutting bluffs
  3. Bring a hand lens — Many of Mississippi’s best fossils are small; a 10x loupe reveals foraminifera and microfossil detail
  4. Explore road cuts along Highway 45 — The north-south corridor through eastern Mississippi crosses multiple Cretaceous formations
  5. Check with the Mississippi Museum of Natural Science in Jackson for current site access information and regional guidance

Collecting Sites

Red Bluff (Hatchetigbee Bluff)

Free Public Access

Waynesboro, Wayne County

A nationally significant Eocene-Oligocene boundary exposure along the Chickasawhay River. The Red Bluff Formation here is the type section for the Vicksburgian Stage. Rich marine fauna can be collected from eroded bluff material.

BivalvesGastropodsCoralsBryozoansForaminifera

Mississippi Petrified Forest

Public (Fee)

Flora, Madison County

A privately owned park and National Natural Landmark preserving large petrified logs from Oligocene-age forests. Visitors can view specimens along the nature trail. Collecting of petrified wood is not permitted within the park, but the surrounding region has loose surface material on private land with permission.

Petrified woodFossilized plant material

Tippah County Road Cuts

Free Public Access

Ripley, Tippah County

Road cuts through Upper Cretaceous chalk and marl near Ripley expose marine fossils from the Selma Group. The Owl Creek Formation is accessible at several exposures east of town. Fossils weather out of the soft chalk matrix.

Cretaceous bivalvesGastropodsShark teethEchinoids

Vicksburg Area Bluffs

Free Public Access

Vicksburg, Warren County

Exposures of the Vicksburg Group along bluffs and road cuts in the Vicksburg area yield Oligocene marine invertebrates. The Mint Spring Formation and Marianna Limestone are the most productive units.

ForaminiferaBivalvesGastropodsBryozoans

Legal Rules for Mississippi

Mississippi does not have specific fossil collecting regulations for invertebrates on public land. Surface collecting along road cuts and river bluffs is generally tolerated. The Mississippi Petrified Forest is privately owned and collecting within the park is prohibited. Always obtain permission for private land. Vertebrate fossils on state land may require coordination with the Mississippi Museum of Natural Science.

Read our full legal guide for federal laws and more details.

Key Geological Formations

  • Cretaceous Selma Group (Upper Cretaceous)
  • Red Bluff Formation (Eocene-Oligocene)
  • Forest Hill Formation (Oligocene)
  • Tallahatta Formation (Eocene)

Local Fossil Clubs & Museums