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East Alcalde

Rio Arriba County, New Mexico
Directions
Next site in New MexicoPilar (garnet) · 16 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 New Mexico
16 miPilar (garnet)Garnet, staurolite16 miHarding Pegmatite MineBlue Apatite, bityite, eucryptite +516 miHarding Pegmatite outcropsApatite, bityite, eucryptite

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About East Alcalde

East Alcalde is a fossil collection site in Rio Arriba, New Mexico, cataloged in the Paleobiology Database. Fossils here come from the Chamita Formation, dated to the Late Hemphillian (9.4–4.7 million years ago). The depositional environment is recorded as terrestrial indet. Documented finds include Osbornoceros osborni, Vulpes stenognathus.

Geologic setting

Formation
Chamita
Geologic interval
Late Hemphillian
Age
9.4–4.7 Ma
Depositional environment
terrestrial indet.
Recorded occurrences
2
Locality notes

coordinates based on Alcalde, NM

Fossils found here

Osbornoceros osborni
Mammalia · Antilocapridae
Vulpes stenognathus
Mammalia · Canidae

Records and references

Data: Paleobiology Database collection 19338 (CC BY 4.0) — view the source record

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Questions about East Alcalde

Can you collect at East Alcalde?

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 East Alcalde?

Fossil.

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What to bring

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Source: Paleobiology Database.