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Updated March 2026
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South Dakota Baculite fossil specimen
cephalopodLate CretaceousUpdated March 2026

South Dakota Baculite

Late Cretaceous

About South Dakota Baculite

The South Dakota Baculite is a cephalopod fossil dating to the Late Cretaceous. Baculite is a realistic South Dakota fossil profile built around straight-shelled ammonite common in western seaway chalk and shale. In this state, success usually comes from learning chalk beds, badlands mudstones, and river gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.

“According to TroveRadar, South Dakota Baculite fossils from the Late Cretaceous are found across South Dakota. TroveRadar's field database catalogs 795+ fossil entries for identification and collection guidance.

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Identification Tips

  • straight chambered shell
  • ribbed exterior
  • suture lines
  • Check chalk beds, badlands mudstones, and river gravels

Where Found

South Dakota

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South Dakota Ammonite

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Explore More

How do I identify a South Dakota Baculite fossil?
South Dakota Baculite fossils from the Late Cretaceous can be identified by: straight chambered shell. ribbed exterior. suture lines. Check chalk beds, badlands mudstones, and river gravels. They are most commonly found in South Dakota.
Where are South Dakota Baculite fossils found?
South Dakota Baculite fossils are found in South Dakota. Look in sedimentary rock formations dating to the Late Cretaceous era. The best collecting is typically found in exposed roadcuts, creek banks, and quarry sites.
How old are South Dakota Baculite fossils?
South Dakota Baculite fossils date to the Late Cretaceous. They are classified as cephalopod fossils in TroveRadar's database, which catalogs 795+ fossil entries across North America.
Is it legal to collect South Dakota Baculite fossils?
Fossil collecting laws vary by state and land ownership. Common invertebrate fossils are generally collectible on some public lands for personal use, but vertebrate fossils and collecting on protected lands may require permits. Always check local regulations before collecting. Use TroveRadar's State Guides for specific rules.