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Rocking Chair Mounds, Shamrock, Collinsworth County (Dozier Lens, Newell 4)

Texas
Directions
Next site in TexasEstelline-Memphis Road, Hall County (Dozier Lens, Newell 8b, Roth 361-H) · 37 mi

Can I collect here?

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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.

Nearby sites

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37 miEstelline-Memphis Road, Hall County (Dozier Lens, Newell 8b, Roth 361-H)Fossil39 miMill Iron RanchFossil40 miOMNH V620Fossil

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About Rocking Chair Mounds, Shamrock, Collinsworth County (Dozier Lens, Newell 4)

Rocking Chair Mounds, Shamrock, Collinsworth County (Dozier Lens, Newell 4) is a fossil collection site in Texas, cataloged in the Paleobiology Database. The depositional environment is recorded as shallow subtidal indet. Documented finds include Leptodesma gouldii, Gloverilima pratti, Lyroschizodus oklahomensis, Heteropecten vanvleeti, Allorisma albequus, Permophorus albequus.

Geologic setting

Geologic interval
Capitanian
Age
264.28–259.51 Ma
Depositional environment
shallow subtidal indet.
Recorded occurrences
10
Locality notes

Three miles southwest of Shamrock, Collinsworth County, in the Dozier lens capping Rocking Chair mounds

Fossils found here

Leptodesma gouldii
Bivalvia · Pterineidae
Gloverilima pratti
Bivalvia · NO_FAMILY_SPECIFIED
Lyroschizodus oklahomensis
Bivalvia · Trigoniidae
Heteropecten vanvleeti
Bivalvia · Heteropectinidae
Allorisma albequus
Bivalvia · Edmondiidae
Permophorus albequus
Bivalvia · Kalenteridae
Spirorbis
NO_CLASS_SPECIFIED · Serpulidae
Apachella capertoni
Gastropoda · Gosseletinidae
Cibecuia gouldii
Gastropoda · Orthonemidae
Naticopsis transversa
Gastropoda · Naticopsidae

Records and references

Data: Paleobiology Database collection 116648 (CC BY 4.0) — view the source record

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Questions about Rocking Chair Mounds, Shamrock, Collinsworth County (Dozier Lens, Newell 4)

Can you collect at Rocking Chair Mounds, Shamrock, Collinsworth County (Dozier Lens, Newell 4)?

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 Rocking Chair Mounds, Shamrock, Collinsworth County (Dozier Lens, Newell 4)?

Fossil.

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What to bring

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Meteorite nearbyA 13.4 kg stony meteorite was found at Wellington in 1955, 16 miles from here.

Source: Paleobiology Database.