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GeoRef Subject
Illinois Basin
Crawford County Illinois
Carboniferous
Paleozoic
United States
Lawrence County Illinois
Mattoon Formation
miospores
palynomorphs
Spermatophyta
Gymnospermae
Pennsylvanian
Plantae
Pteridophyta
Pteridospermae
Illinois
microfossils
Upper Pennsylvanian
Wabash County Illinois
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