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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
- 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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