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Freda Sandstone

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Freda Sandstone
Stratigraphic range: Proterozoic
TypeFormation
UnderliesJacobsville Sandstone
OverliesNonesuch Shale
Lithology
Primarysandstone
Othermudstone, shale
Location
RegionMichigan and Wisconsin
Country United States
Freda Sandstone (Pcf, grey) on NPS Apostle Islands geological map

The Freda Sandstone is a geologic formation in Michigan. It dates back to the Proterozoic. Lithologically, the Freda Sandstone is a lithic, red-brown, cyclic sequence of sandstones, mudstones and shales (conglomerates are rare).

References

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  • Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 25 March 2022. Retrieved 17 December 2021.