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04-AA64-A

Mason County, Kentucky
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Next site in KentuckyC2 - Maysville · 2 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.

2 miC2 - MaysvilleFossil3 mi04-AA67-AFossil8 mi03-FCL-AFossil

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About 04-AA64-A

04-AA64-A is a fossil collection site in Mason, Kentucky, cataloged in the Paleobiology Database. Fossils here come from the Sunset Formation, dated to the Richmondian (449.6–445.5 million years ago). The depositional environment is recorded as deep subtidal ramp and the tectonic setting is cratonic basin. Documented finds include Hebertella occidentalis, Leptaena, Platystrophia, Rafinesquina alternata, Bryozoa, Trepostomata.

Geologic setting

Formation
Sunset
Geologic interval
Richmondian
Age
449.6–445.5 Ma
Depositional environment
deep subtidal ramp
Tectonic setting
cratonic basin
Recorded occurrences
8
Locality notes

Roadcut on both sides of AA highway (Kentucky State Route 9), 0.4 miles west of intersection with Kentucky State Route 11

Fossils found here

Hebertella occidentalis
Rhynchonellata · Plectorthidae
Leptaena
Strophomenata · Rafinesquinidae
Platystrophia
Rhynchonellata · Platystrophiidae
Rafinesquina alternata
Strophomenata · Rafinesquinidae
Bryozoa
Bryozoa
Trepostomata
Stenolaemata
Deceptrix
Bivalvia · Cardiolariidae
Isotelus
Trilobita · Asaphidae

Records and references

Data: Paleobiology Database collection 73107 (CC BY 4.0) — view the source record

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Questions about 04-AA64-A

Can you collect at 04-AA64-A?

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 04-AA64-A?

Fossil.

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Meteorite nearbyA 86 kg stony meteorite fell at Bath Furnace in 1902, 25 miles from here.

Source: Paleobiology Database.