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MP-197

Wyoming
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Next site in WyomingMP-217 · 0.2 mi

Can I collect here?

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Based on our latest records, with claims updated from the BLM on Oct 3, 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-217Fossil0.2 miMP-216Fossil0.4 miMP-211Fossil

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About MP-197

MP-197 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 Allognathosuchus, Amia, Arfia shoshoniensis, Cantius mckennai, Cardiolophus radinskyi, Coryphodon eocaenus.

Geologic setting

Formation
Willwood
Geologic interval
Wasatchian
Age
56–51.1 Ma
Depositional environment
fluvial-lacustrine indet.
Tectonic setting
intermontane basin
Recorded occurrences
21
Locality notes

Quad = Ralston, Township = 54N, Range = 99W, Section = 8

Fossils found here

Allognathosuchus
Reptilia · Alligatoridae
Amia
Osteichthyes · Amiidae
Arfia shoshoniensis
Mammalia · Hyaenodontidae
Cantius mckennai
Mammalia · Notharctidae
Cardiolophus radinskyi
Mammalia · NO_FAMILY_SPECIFIED
Coryphodon eocaenus
Mammalia · Coryphodontidae
Diacodexis metsiacus
Mammalia · Diacodexeidae
Ectocion osbornianus
Mammalia · Phenacodontidae
Esthonyx spatularius
Mammalia · Esthonychidae
Haplomylus speirianus
Mammalia · Apheliscidae
Hyopsodus loomisi
Mammalia · Hyopsodontidae
Sifrhippus grangeri
Mammalia · Equidae
Insectivora
Mammalia
Lacertilia
Reptilia
Pachyaena ossifraga
Mammalia · Mesonychidae
Palaeosinopa
Mammalia · Pantolestidae
Paramys copei
Mammalia · Ischyromyidae
Paramys taurus
Mammalia · Ischyromyidae
Phenacodus vortmani
Mammalia · Phenacodontidae
Osteichthyes
Osteichthyes
Thryptacodon antiquus
Mammalia · Arctocyonidae

Records and references

Data: Paleobiology Database collection 46768 (CC BY 4.0) — view the source record

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Questions about MP-197

Can you collect at MP-197?

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-197?

Fossil.

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Source: Paleobiology Database.