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USGS M28665

Orange County, California
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Next site in CaliforniaCorona Lead-Zinc Mine · 3 mi

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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.

3 miCorona Lead-Zinc MineGalena, silver, sphalerite, stibnite4 miSentinal OakGalena, gold, silver, sphalerite4 miBlue Light MineGalena, gold, silver, sphalerite

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About USGS M28665

USGS M28665 is a fossil collection site in Orange, California, cataloged in the Paleobiology Database. Fossils here come from the Bedford Canyon, dated to the Bajocian (170.9–168.2 million years ago). The depositional environment is recorded as marine indet and the tectonic setting is forearc basin. Documented finds include Inoceramus hamadae, Bositra buchi, Holcophylloceras, Dorsetensia liostraca, Teloceras.

Geologic setting

Formation
Bedford Canyon
Geologic interval
Bajocian
Age
170.9–168.2 Ma
Depositional environment
marine indet.
Tectonic setting
forearc basin
Recorded occurrences
5
Locality notes

Another limestone (USGS Mesozoic loc. 28665) contains fossils of Bajocian age and is located near the head of McBride Canyon in the NE corner of sec. 31, T. 4 S., R. 6 W. This lens is on the south side of the canyon just north of the crest of a low ridge. It is about 400 feet west of the east line of sec. 31, 300 feet south of the north line of sec. 31, and 800 feet east of the Bedford Motorway. A map showing the geologic and geographic setting of the area that includes these limestone lenses has been published previously (Silberling, Schoellhamer, Gray, and Imlay, 1961, p. 1747).

Fossils found here

Inoceramus hamadae
Bivalvia · Inoceramidae
Bositra buchi
Bivalvia · Posidoniidae
Holcophylloceras
Cephalopoda · Phylloceratidae
Dorsetensia liostraca
Cephalopoda · Sonniniidae
Teloceras
Cephalopoda · Stephanoceratidae

Records and references

Data: Paleobiology Database collection 200048 (CC BY 4.0) — view the source record

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Questions about USGS M28665

Can you collect at USGS M28665?

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 M28665?

Fossil.

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Meteorite nearbyA 56 g stony meteorite fell at San Juan Capistrano in 1973, 23 miles from here.

Source: Paleobiology Database.