The Scales Shale is a
geologic formation 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
Ordovician 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 ...
References
*
Ordovician Iowa
Ordovician Illinois
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