Fossil-bearing formation in Michigan
Grand River Formation |
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Stratigraphic range: Pennsylvanian |
Type | Formation |
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Underlies | Ionia Formation |
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Overlies | Saginaw Formation |
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Location |
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Region | Michigan |
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Country | United States |
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The Grand River Formation is a geologic formation in Michigan. It preserves fossils dating back to the Pennsylvanian period.
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- Michigan portal
- Paleontology portal
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.
Chronostratigraphy of Michigan
Ph | Cz | |
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Mz | |
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Pz | C | ⁋ | - Grand River Formation
- Saginaw Formation
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indet. | |
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M | - Bayport Limestone
- Coldwater Shale
- Marshall Sandstone
- Sunbury Shale
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D | |
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S | |
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O | |
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Є | |
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pЄ | |
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