Big Hill Formation
Stratigraphic range: Late Ordovician
Jointed limestone from the Big Hill Formation (Upper Peninsula of Michigan)
Type	Formation
Unit of	Richmond Group (geology)
Underlies	Manitoulin Dolomite
Overlies	Stonington Formation
Lithology
Primary	limestone
Location
Region	Michigan
Country	United States

The Big Hill Formation is a geologic formation in Michigan. It preserves fossils dating back to the Ordovician period. A fossiliferous site on the Stonington Peninsula (in Delta County) includes a dolomite bed of the Big Hill Formation which has abundant and well-preserved fossils. The most common fossils are soft-bodied medusae (jellyfish), followed by linguloid brachiopods, algae, and arthropods (namely chasmataspidids, leperditid ostracods, and eurypterids). This site is considered a Konservat-Lagerstätte, and is commonly referred to as the Big Hill Lagerstätte or Big Hill Biota. ^{[1] [2]}

See also

• List of fossiliferous stratigraphic units in Michigan

References

• Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.

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