Scales Shale

Scales Shale
Scales Shale
Stratigraphic range: Ordovician
Type	Formation
Unit of	Maquoketa Group
Underlies	Fort Atkinson Limestone
Overlies	Trenton Limestone
Location
Region	Illinois, Indiana
Country	United States

Last updated July 04, 2025

The Scales Shale is a geologic formation in Illinois. It preserves fossils dating back to the Ordovician period.

References

Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database" . Retrieved 22 June 2014.

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Scales Shale

See also

References