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Glen Park Formation, stratigraphic locality 396 (Poor Farm Hollow Road), Calhoun

Calhoun County, Illinois
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Next site in IllinoisSalt Spring Hollow, about two miles north of the hollow south of Kritesville · 5 mi

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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

All of Illinois
5 miSalt Spring Hollow, about two miles north of the hollow south of KritesvilleFossil18 miOld MonroeLake Superior Agate, garnet, staurolite24 miTroyCalcite, marcasite, pyrite +5

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About Glen Park Formation, stratigraphic locality 396 (Poor Farm Hollow Road), Calhoun

Glen Park Formation, stratigraphic locality 396 (Poor Farm Hollow Road), Calhoun is a fossil collection site in Calhoun, Illinois, cataloged in the Paleobiology Database. Fossils here come from the Glen Park Formation, dated to the Tournaisian (358.86–346.7 million years ago). The depositional environment is recorded as shallow subtidal indet. Documented finds include Schuchertella, Sedenticellula hamburgensis, Axiodeaneia, Rhynchopora, Cardiothyris, Tylothyris missouriensis.

Geologic setting

Formation
Glen Park
Geologic interval
Tournaisian
Age
358.86–346.7 Ma
Depositional environment
shallow subtidal indet.
Recorded occurrences
11
Locality notes

Poor Farm Hollow Road, Illinois. Glen Park Formation in creek bank on south side of Poor Farm Hollow Road, about 1.1 miles west of Illinois 100. SW 1/4, NW 1/4, sec. 22, T. 10 S., R. 2 W., Hamburg Quad., Calhoun Co., IL.; coordinates based on Poor Farm Hollow in the Hamburg Quad.

Fossils found here

Schuchertella
Strophomenata · Schuchertellidae
Sedenticellula hamburgensis
Rhynchonellata · Stenoscismatidae
Axiodeaneia
Rhynchonellata · Rhynchotetradidae
Rhynchopora
Rhynchonellata · Rhynchoporidae
Cardiothyris
Rhynchonellata · Athyrididae
Tylothyris missouriensis
Rhynchonellata · Mucrospiriferidae
Syringothyris
Rhynchonellata · Syringothyrididae
Zeugopleura
Rhynchonellata · Dimegelasmidae
Hamburgia
Rhynchonellata · Cranaenidae
Beecheria
Rhynchonellata · Beecheriidae
Dielasmella
Rhynchonellata · Cryptonellidae

Records and references

Data: Paleobiology Database collection 5810 (CC BY 4.0) — view the source record

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Questions about Glen Park Formation, stratigraphic locality 396 (Poor Farm Hollow Road), Calhoun

Can you collect at Glen Park Formation, stratigraphic locality 396 (Poor Farm Hollow Road), Calhoun?

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 Glen Park Formation, stratigraphic locality 396 (Poor Farm Hollow Road), Calhoun?

Fossil.

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Source: Paleobiology Database.