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Stewart's Mill reef

Esmeralda County, Nevada
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Next site in NevadaWashington-Nevada Claims · 1 mi

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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 Nevada
1 miWashington-Nevada ClaimsAzurite, chrysocolla, copper +32 miMonaco ClaimsArgentite, azurite, chalcopyrite +114 miStewart's Mill, section RR 32Fossil

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About Stewart's Mill reef

Stewart's Mill reef is a fossil collection site in Esmeralda, Nevada, cataloged in the Paleobiology Database. Fossils here come from the Poleta Formation, dated to the Botomian (516–512.1 million years ago). The depositional environment is recorded as reef, buildup or bioherm. Documented finds include Protopharetra, Paranacyathus, Renalcis, Epiphyton, Retilamina, Trilobita.

Geologic setting

Formation
Poleta
Geologic interval
Botomian
Age
516–512.1 Ma
Depositional environment
reef, buildup or bioherm
Recorded occurrences
12

Fossils found here

Protopharetra
Archaeocyatha · Archaeopharetridae
Paranacyathus
Archaeocyatha · Loculicyathidae
Renalcis
NO_CLASS_SPECIFIED · Chabakoviacea
Epiphyton
NO_CLASS_SPECIFIED · Ludloviaceae
Retilamina
Archaeocyatha · Dictyocyathidae
Trilobita
Trilobita
Chancelloria
Coeloscleritophora · Chancelloriidae
Echinodermata
Echinodermata
Helcionelloida
Helcionelloida
Hyolitha
Hyolitha
Brachiopoda
Brachiopoda
Eocrinoidea
Eocrinoidea

Records and references

Data: Paleobiology Database collection 81038 (CC BY 4.0) — view the source record

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Questions about Stewart's Mill reef

Can you collect at Stewart's Mill reef?

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 Stewart's Mill reef?

Fossil.

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What to bring

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Meteorite nearbyA 192.8 kg iron meteorite was found at Owens Valley in 1913, 29 miles from here.

Source: Paleobiology Database.