Freda Sandstone

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).

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References

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

  • Catacosinos, Paul (1991). "Early Sedimentary Evolution of the Michigan Basin". Geological Society of America Special Paper. 256 (1): 248. ISBN 978-0-8137-2256-6.
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Chronostratigraphy of Michigan
Ph
Cz
Q
Pleistocene
indet.
Glacial till
Mz
J
indet.
  • Ionia Formation
Pz
C
indet.
M
D
Upper
indet.
Frasnian
Middle
Givetian
Lower
S
indet.
Llandovery
O
Upper
Sandbian
Middle
Darriwilian
Lower
Є
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Ph
Pz
D
Upper
  • Antrim Formation
Middle
S
O
Upper
Middle
Lower
Є
Y
Stenian


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