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UCMP 484, Mount Diablo

Contra Costa County, California
Directions
Next site in CaliforniaUCMP 476, Mount Diablo · 2 mi

Can I collect here?

Pro
See who owns this land and whether it is claimedPro shows the owner, the claim on this spot and every claim within a mile.
Read the collecting rules by land type

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 California
2 miUCMP 476, Mount DiabloFossil2 miUCMP 714, Riggs CanyonFossil2 miBrssi & Land Mag CoAzurite, chrysocolla, copper, malachite

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About UCMP 484, Mount Diablo

UCMP 484, Mount Diablo is a fossil collection site in Contra Costa, California, cataloged in the Paleobiology Database. The depositional environment is recorded as marine indet. Documented finds include Trochocyathus pergranulatus.

Geologic setting

Geologic interval
Santonian to Campanian
Age
85.7–72.2 Ma
Depositional environment
marine indet.
Recorded occurrences
1
Locality notes

SE1/4 of SW1/4, sec. 9, T1S, R1E

Fossils found here

Trochocyathus pergranulatus
Anthozoa · Caryophylliidae

Records and references

Data: Paleobiology Database collection 122298 (CC BY 4.0) — view the source record

Getting there

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Questions about UCMP 484, Mount Diablo

Can you collect at UCMP 484, Mount Diablo?

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 UCMP 484, Mount Diablo?

Fossil.

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Source: Paleobiology Database.