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MP-140

Wyoming
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Next site in WyomingMP-139 · 0.2 mi

Can I collect here?

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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 Wyoming
0.2 miMP-139Fossil2 miMP-154Fossil2 miMP-155Fossil

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About MP-140

MP-140 is a fossil collection site in Wyoming, cataloged in the Paleobiology Database. Fossils here come from the Willwood Formation, dated to the Wasatchian (56–51.1 million years ago). The depositional environment is recorded as fluvial-lacustrine indet and the tectonic setting is intermontane basin. Documented finds include Anacodon ursidens, Apatemys, Cantius abditus, Diacodexis metsiacus, Bunophorus robustus, Esthonyx bisulcatus.

Geologic setting

Formation
Willwood
Geologic interval
Wasatchian
Age
56–51.1 Ma
Depositional environment
fluvial-lacustrine indet.
Tectonic setting
intermontane basin
Recorded occurrences
12
Locality notes

Quad = Gilmore Hill, Township = 53N, Range = 98W, Section = 34

Fossils found here

Anacodon ursidens
Mammalia · Arctocyonidae
Apatemys
Mammalia · Apatemyidae
Cantius abditus
Mammalia · Notharctidae
Diacodexis metsiacus
Mammalia · Diacodexeidae
Bunophorus robustus
Mammalia · Diacodexeidae
Esthonyx bisulcatus
Mammalia · Esthonychidae
Hyopsodus simplex
Mammalia · Hyopsodontidae
Bunophorus etsagicus
Mammalia · Diacodexeidae
Arenahippus pernix
Mammalia · Equidae
Lacertilia
Reptilia
Miacis exiguus
Mammalia · NO_FAMILY_SPECIFIED
Vulpavus australis
Mammalia · NO_FAMILY_SPECIFIED

Records and references

Data: Paleobiology Database collection 46729 (CC BY 4.0) — view the source record

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Questions about MP-140

Can you collect at MP-140?

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 MP-140?

Fossil.

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What to bring

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Source: Paleobiology Database.