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USGS Mesozoic loc. 2423

California
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Next site in CaliforniaUSGS Mesozoic loc. 9258 · 0.8 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
0.8 miUSGS Mesozoic loc. 9258Fossil2 miIron DikeChalcopyrite, copper, malachite, quartz2 miUSGS Mesozoic loc. 2425aFossil

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About USGS Mesozoic loc. 2423

USGS Mesozoic loc. 2423 is a fossil collection site in California, cataloged in the Paleobiology Database. Fossils here come from the Mormon Formation, dated to the Bajocian (170.9–168.2 million years ago). The depositional environment is recorded as marine indet. Documented finds include Trigonia hemisphaerica, Myophorella yellowstonensis.

Geologic setting

Formation
Mormon
Geologic interval
Bajocian
Age
170.9–168.2 Ma
Depositional environment
marine indet.
Altitude
1500 meters
Recorded occurrences
2
Locality notes

Elev. 1500 m (4925 ft), Spur 8 (approx. 1.4 km bearing 225° from peak of Mount Jura, California.

Fossils found here

Trigonia hemisphaerica
Bivalvia · Trigoniidae
Myophorella yellowstonensis
Bivalvia · Myophorellidae

Records and references

Data: Paleobiology Database collection 139298 (CC BY 4.0) — view the source record

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Questions about USGS Mesozoic loc. 2423

Can you collect at USGS Mesozoic loc. 2423?

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 USGS Mesozoic loc. 2423?

Fossil.

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Meteorite nearbyA 2.1 kg iron meteorite was found at Grass Flat in 1979, 28 miles from here.

Source: Paleobiology Database.