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USGS 22883. Muldoon Hill

Colorado
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Next site in ColoradoD3922. Pueblo 4 NW · 10 mi

Can I collect here?

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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.

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All of Colorado
10 miD3922. Pueblo 4 NWFossil26 miElizabeth ProspectAzurite, chalcopyrite, chrysocolla +627 miFountain FormationFossil

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About USGS 22883. Muldoon Hill

USGS 22883. Muldoon Hill is a fossil collection site in Colorado, cataloged in the Paleobiology Database. Fossils here come from the Graneros Shale, dated to the Cenomanian (100.5–93.9 million years ago). The depositional environment is recorded as carbonate indet. Documented finds include Diploconcha, Scleractinia, Nuculana, Breviarca, Inoceramus, Exogyra.

Geologic setting

Formation
Graneros Shale
Geologic interval
Cenomanian
Age
100.5–93.9 Ma
Depositional environment
carbonate indet.
Recorded occurrences
15

Fossils found here

Diploconcha
Polychaeta · NO_FAMILY_SPECIFIED
Scleractinia
Anthozoa
Nuculana
Bivalvia · Nuculanidae
Breviarca
Bivalvia · Arcidae
Inoceramus
Bivalvia · Inoceramidae
Exogyra
Bivalvia · Gryphaeidae
Camptonectes
Bivalvia · Pectinidae
Limatula
Bivalvia · Limidae
Scaphopoda
Scaphopoda
Gastropoda
Gastropoda
Turrilites
Cephalopoda · Turrilitidae
Calycoceras (Gentoniceras) leonense
Cephalopoda · Acanthoceratidae
Conlinoceras gilberti
Cephalopoda · Acanthoceratidae
Cunningtoniceras cunningtoni
Cephalopoda · Acanthoceratidae
Borissjakoceras
Cephalopoda · Binneyitidae

Records and references

Data: Paleobiology Database collection 230801 (CC BY 4.0) — view the source record

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Questions about USGS 22883. Muldoon Hill

Can you collect at USGS 22883. Muldoon Hill?

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 22883. Muldoon Hill?

Fossil.

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Source: Paleobiology Database.