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L-9230, Arroyo Alamito

New Mexico
Directions
Next site in New MexicoBelen NMMNH L-3737 · 9 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.
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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.

9 miBelen NMMNH L-3737Fossil15 miBelen to Los LunasGem Agate16 miLos LunasRed Agate, banded agate, apache tears +2

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About L-9230, Arroyo Alamito

L-9230, Arroyo Alamito is a fossil collection site in New Mexico, cataloged in the Paleobiology Database. Fossils here come from the Mancos Shale, dated to the Late Turonian (93.9–89.8 million years ago). The depositional environment is recorded as marine indet. Documented finds include Prionocyclus macombi, Hourcquia mirabilis, Inoceramidae.

Geologic setting

Formation
Mancos Shale
Geologic interval
Late Turonian
Age
93.9–89.8 Ma
Depositional environment
marine indet.
Recorded occurrences
3
Locality notes

North of Rio Gallina in SE1/4 sec. 15, T. 25 N., R. 1 E., Rio Arriba County.

Fossils found here

Prionocyclus macombi
Cephalopoda · Collignoniceratidae
Hourcquia mirabilis
Cephalopoda · Pseudotissotiidae
Inoceramidae
Bivalvia · Inoceramidae

Records and references

Data: Paleobiology Database collection 229812 (CC BY 4.0) — view the source record

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Questions about L-9230, Arroyo Alamito

Can you collect at L-9230, Arroyo Alamito?

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 L-9230, Arroyo Alamito?

Fossil.

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Meteorite nearbyA 130 g iron meteorite was found at New Mexico in 1935, 7 miles from here.

Source: Paleobiology Database.