Freda Sandstone

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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Freda Sandstone (Pcf, grey) on NPS Apostle Islands geological map