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55 Specimen Results
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County:
Grundy
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Phylum
Lycophyta (1)
Mollusca (1)
Pteridophyta (34)
Order
Equisetales (8)
Lepidodendrales (1)
Marattiales (13)
Trigonocarpales (13)
Class
Bivalvia (1)
Family
Alethopteridaceae (5)
Calamitaceae (8)
Lepidodendraceae (1)
Marattiaceae (13)
Medullosaceae (8)
Genus
Alethopteris (5)
Annularia (8)
Codonotheca (2)
Lepidodendron (1)
Neuropteris (6)
Pecopteris (13)
has media
Has media (2)
Has no media (53)
Individual/Organization
Sternberg, G.F. (20)
Zakrzewski, R.J. (1)
Mrs. Danforth, F. (34)
Bures, J. (1)
Period
Pennsylvanian (53)
Permian (1)
Formation
Mazon Creek (55)
Country
United States of America (55)
State/Province
Illinois (55)