Saginaw Group
The Saginaw Group is a geologic group in Michigan composed of sedimentary rock deposited during the Pennsylvanian Period (circa 323.2 million years ago to 298.9 million years ago. Saginaw group rocks include sandstone, shale, coal, and limestone of fresh water, brackish, and marine origin. Fossils dating back to the Penssylvanian Period (Late or Upper Carboniferous period) can be found in Saginaw Group formations.
| Saginaw Group Stratigraphic range: Carboniferous | |
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References
- USGS Mineral Resources On-Line Spatial Data. https://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=MIPAs. Retrieved 2 May 2017.
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 31 July 2014. Retrieved 22 June 2014.
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