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USGS locality 4256, northwest of Coleharbor, ND, upper Fort Union Fm

McLean County, North Dakota
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Next site in North DakotaUSGS locality 9202, 3 miles east of Fort Stevenson, Fort Union Fm · 25 mi

Can I collect here?

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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

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25 miUSGS locality 9202, 3 miles east of Fort Stevenson, Fort Union FmFossil28 miARCO Wunderlich #1 - North Dakota Geo Survey Well #8803Fossil31 miCrowley QuarryGem Flint

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About USGS locality 4256, northwest of Coleharbor, ND, upper Fort Union Fm

USGS locality 4256, northwest of Coleharbor, ND, upper Fort Union Fm is a fossil collection site in McLean, North Dakota, cataloged in the Paleobiology Database. Fossils here come from the Fort Union Formation, dated to the Paleocene (66–56 million years ago). The depositional environment is recorded as fluvial indet. Documented finds include Cercidiphyllum.

Geologic setting

Formation
Fort Union
Geologic interval
Paleocene
Age
66–56 Ma
Depositional environment
fluvial indet.
Recorded occurrences
1
Locality notes

'Bluffs on Missouri River one and a half miles northwest of Coleharbor.'

Fossils found here

Cercidiphyllum
NO_CLASS_SPECIFIED · Cercidiphyllaceae

Records and references

Data: Paleobiology Database collection 40389 (CC BY 4.0) — view the source record

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Questions about USGS locality 4256, northwest of Coleharbor, ND, upper Fort Union Fm

Can you collect at USGS locality 4256, northwest of Coleharbor, ND, upper Fort Union Fm?

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 USGS locality 4256, northwest of Coleharbor, ND, upper Fort Union Fm?

Fossil.

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Source: Paleobiology Database.