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CAS Loc. 444 - Hornbrook

Siskiyou County, California
Directions
Next site in California3 miles north of Henley · 2 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 CAS Loc. 444 - Hornbrook

CAS Loc. 444 - Hornbrook is a fossil collection site in Siskiyou, California, cataloged in the Paleobiology Database. The depositional environment is recorded as coastal indet. Documented finds include Tetragonites popetensis, Desmophyllites diphylloides, Fagesia siskiyouensis, Trochactaeon (Trochactaeon) frazierensis.

Geologic setting

Geologic interval
Campanian
Age
83.6–72.2 Ma
Depositional environment
coastal indet.
Recorded occurrences
5
Geology notes

ENVIRONMENT: Not reported in text, but apparently shallow marine siliciclastic.

Locality notes

SPECIFIC LOCATION: Near Henley, Hornbrook Quad., Siskiyou Co., California. LAT/LONG: estimate based on Hornbrook, California.

Fossils found here

Tetragonites popetensis
Cephalopoda · Tetragonitidae
Desmophyllites diphylloides
Cephalopoda · Desmoceratidae
Fagesia siskiyouensis
Cephalopoda · Vascoceratidae
Trochactaeon (Trochactaeon) frazierensis
Gastropoda · Acteonidae

Records and references

Data: Paleobiology Database collection 86809 (CC BY 4.0) — view the source record

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Questions about CAS Loc. 444 - Hornbrook

Can you collect at CAS Loc. 444 - Hornbrook?

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 CAS Loc. 444 - Hornbrook?

Fossil.

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Source: Paleobiology Database.