The Fraileys Formation or Fraileys Shale is a
geologic formation
A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics ( lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exp ...
in
Illinois. It preserves
fossils
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in ...
dating back to the
Carboniferous
The Carboniferous ( ) is a geologic period and system of the Paleozoic that spans 60 million years from the end of the Devonian Period million years ago ( Mya), to the beginning of the Permian Period, million years ago. The name ''Carbonifero ...
period.
See also
*
List of fossiliferous stratigraphic units in Illinois
This article contains a list of fossil-bearing stratigraphic units in the state of Illinois, U.S.
Sites
See also
* Paleontology in Illinois
References
*
{{DEFAULTSORT:Fossiliferous stratigraphic units in Illinois
Illinois
Stratigraphi ...
*
List of fossiliferous stratigraphic units in Kentucky
References
*
Carboniferous Illinois
Carboniferous southern paleotropical deposits
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