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USC Loc. 350 - Circle Wash Reservoir

Nevada
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Next site in NevadaSix Claim Block · 7 mi

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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.

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About USC Loc. 350 - Circle Wash Reservoir

USC Loc. 350 - Circle Wash Reservoir is a fossil collection site in Nevada, cataloged in the Paleobiology Database. Fossils here come from the Arcturus Formation, dated to the Artinskian (290.1–283.3 million years ago). The depositional environment is recorded as open shallow subtidal. Documented finds include Protowentzelella kunthi.

Geologic setting

Formation
Arcturus
Geologic interval
Artinskian
Age
290.1–283.3 Ma
Depositional environment
open shallow subtidal
Recorded occurrences
1
Locality notes

Limestone bluff in the lower part of the Arcturus formation where Circle Wash cuts southeastward through the hills about 200 yards south of Circle Wash reservoir. Probably cen., W 1/2, sec. 26, T. 15 N., R. 59 E., Treasure Hill quadrangle.

Fossils found here

Protowentzelella kunthi
Anthozoa · Kleopatrinidae

Records and references

Data: Paleobiology Database collection 107580 (CC BY 4.0) — view the source record

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Questions about USC Loc. 350 - Circle Wash Reservoir

Can you collect at USC Loc. 350 - Circle Wash Reservoir?

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 USC Loc. 350 - Circle Wash Reservoir?

Fossil.

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Source: Paleobiology Database.