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USNM 18138

Siskiyou County, California
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Next site in CaliforniaUSNM 18118 · 1 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.

Nearby sites

All of California
1 miUSNM 18118Fossil6 miUSNM 18172Fossil6 miUSNM 18136Fossil

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About USNM 18138

USNM 18138 is a fossil collection site in Siskiyou, California, cataloged in the Paleobiology Database. Fossils here come from the Kangaroo Creek Formation, dated to the Ashgill (449.5–443.1 million years ago). The depositional environment is recorded as carbonate indet. Documented finds include Proturritella historicum, Streptelasma etnaense, Eurogrewingkia penobscotensis, Eurogrewingkia callahanensis.

Geologic setting

Formation
Kangaroo Creek
Geologic interval
Ashgill
Age
449.5–443.1 Ma
Depositional environment
carbonate indet.
Altitude
3690 feet
Recorded occurrences
4
Locality notes

NE¼ NW¼ sec. 3 T41N R8W, Etna Quadrangle

Fossils found here

Proturritella historicum
Gastropoda · Lophospiridae
Streptelasma etnaense
Anthozoa · Streptelasmatidae
Eurogrewingkia penobscotensis
Anthozoa · Streptelasmatidae
Eurogrewingkia callahanensis
Anthozoa · Streptelasmatidae

Records and references

Data: Paleobiology Database collection 69236 (CC BY 4.0) — view the source record

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Questions about USNM 18138

Can you collect at USNM 18138?

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 USNM 18138?

Fossil.

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Source: Paleobiology Database.