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Tanis

Bowman County, North Dakota
Directions
Next site in North DakotaUSGS locality 6382, about 3 miles east of Scranton, Marmarth Project, Fort Union · 9 mi

Can I collect here?

Pro
See who owns this land and whether it is claimedPro shows the owner, the claim on this spot and every claim within a mile.
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Based on our latest records, with claims updated from the BLM on Oct 9, 2026. Land and claims can change quickly, so check before you go.

Minerals on record here

1 mineral

Recorded here: fossil.

Nearby sites

All of North Dakota
9 miUSGS locality 6382, about 3 miles east of Scranton, Marmarth Project, Fort UnionFossil17 miDEW-22 OrnithomimidFossil18 miUSGS locality 6225, 8 miles south of Dakota Natural Forest, Fort Union FmFossil

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About Tanis

Tanis is a fossil collection site in Bowman, North Dakota, cataloged in the Paleobiology Database. Fossils here come from the Hell Creek Formation, dated to the Maastrichtian (72.2–66 million years ago). The depositional environment is recorded as terrestrial indet. Documented finds include Acipenser praeparatorum, Acipenser amnisinferos.

Geologic setting

Formation
Hell Creek
Geologic interval
Maastrichtian
Age
72.2–66 Ma
Depositional environment
terrestrial indet.
Recorded occurrences
2

Fossils found here

Acipenser praeparatorum
Osteichthyes · Acipenseridae
Acipenser amnisinferos
Osteichthyes · Acipenseridae

Records and references

Data: Paleobiology Database collection 227364 (CC BY 4.0) — view the source record

Getting there

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Questions about Tanis

Can you collect at Tanis?

It depends on who owns the land and whether a mining claim covers it. BLM land usually allows hand collecting for personal use, national parks allow none, and private land needs the owner’s permission. Pro members see the owner and any claims at this spot.

What minerals are found at Tanis?

Fossil.

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Source: Paleobiology Database.