| Stonington Formation Stratigraphic range: Late Ordovician | |
|---|---|
| Type | Formation |
| Unit of | Richmond Group (geology) |
| Sub-units | Ogontz Member and Bay de Noc Member |
| Underlies | Big Hill Formation |
| Overlies | Bill's Creek Shale |
| Location | |
| Region |  Michigan |
| Country |  United States |
The Stonington Formation is a geologic formation in Michigan. It preserves fossils dating back to the Ordovician period.
The Bass Islands Formation is a geologic formation in Michigan. It preserves fossils dating back to the Silurian period.
The Lucas Formation is a geologic formation in Michigan. It preserves fossils dating back to the Devonian period.
The Silica Formation is a geologic formation in Michigan. It preserves fossils dating back to the Devonian period.
The Alpena Formation is a geologic formation in Michigan. It preserves fossils dating back to the Devonian period.
The Cordell Formation is a geologic formation in Michigan. It preserves fossils dating back to the Silurian period.
The Collingwood Formation is a geologic formation in Michigan. It preserves fossils dating back to the Ordovician period.
The Sylvania Sandstone is a geologic formation in Ohio and Michigan. Its type locality is Sylvania, Ohio. It preserves fossils dating back to the Devonian period.
The Amherstburg Formation is a geologic formation in Ontario, Canada and Michigan, United States. It preserves fossils dating back to the Devonian period.
The Big Hill Formation is a geologic formation in Michigan. It preserves fossils dating back to the Ordovician period.
The Cabot Head Shale is a geologic formation in Michigan. It preserves fossils dating back to the Silurian period.
The Lime Island Formation is a geologic formation in Michigan. It preserves fossils dating back to the Silurian period.
The Hendricks Formation is a geologic formation in Michigan. It preserves fossils dating back to the Silurian period.
The Schoolcraft Formation is a geologic formation in Michigan. It preserves fossils dating back to the Silurian period.
The Rockview Formation is a geologic formation in Michigan. It preserves fossils dating back to the Silurian period.
The Rapson Creek Formation is a geologic formation in Michigan. It preserves fossils dating back to the Silurian period.
The Bush Bay Formation is a geologic formation in Michigan. It preserves fossils dating back to the Silurian period.
The Garden Island Formation is a geologic formation in Michigan. It preserves fossils dating back to the Devonian period.
The Bois Blanc Formation is a geologic formation in Michigan. It preserves fossils dating back to the Devonian period.
The Ellsworth Shale is a geologic formation in Michigan. It preserves fossils dating back to the Devonian period.
The Copper Harbor Conglomerate is a geologic formation in Michigan. It is part of the larger Oronto Group and its formation dates to the Stenian period of the Proterozoic.
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