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List of fossiliferous stratigraphic units in Montana

This article contains a list of fossil-bearing stratigraphic units in the state of Montana, U.S.

Sites

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Group or Formation Period Notes
Alan Mountain Limestone Carboniferous
Amsden Formation Carboniferous
Arikaree Formation Neogene
Bear Formation Paleogene
Bearpaw Formation Cretaceous
Bearpaw Shale Cretaceous
Benton Shale Cretaceous
Big Snowy Formation Carboniferous
Big Snowy Group/Heath Formation Carboniferous
Blackleaf Formation Cretaceous
Blacktail Deer Creek Formation Cretaceous
Cameron Creek Formation Carboniferous
Castle Reef Dolomite Carboniferous
Claggett Formation Cretaceous
Claggett Shale Cretaceous
Climbing Arrow Formation Paleogene
Cloverly Formation Cretaceous
Cody Shale Cretaceous
Colorado Group/Belle Fourche Formation Cretaceous
Cook Ranch Formation Paleogene
Deadwood Formation Ordovician, Cambrian
Dearborne Limestone Cambrian
Deep River Formation Neogene
Dell Beds Formation Paleogene
Dinwoody Formation Triassic
Dunbar Creek Formation Paleogene
Eagle Formation Cretaceous
Ellis Formation Jurassic
Flaxville Gravels Formation Neogene
Fort Union Formation Paleogene, Cretaceous
Fort Union No. 3 Beds (Melville) Formation Paleogene
Fort Union Group/Tullock Formation Paleogene
Fox Hills Sandstone Cretaceous
Graneros Shale Cretaceous
Greyson Shale Precambrian
Hell Creek Formation Paleogene, Cretaceous
Hepburn's Mesa Formation Neogene
Horsethief Formation Cretaceous
Jefferson Formation Devonian
Judith River Formation Cretaceous
Kishenehn Formation Paleogene
Kootenai Formation Cretaceous
Lance Formation Cretaceous
Lebo Formation Paleogene
Livingston Formation Paleogene
Lodgepole Limestone Carboniferous
Ludlow Formation Paleogene
Madison Group/Lodgepole and Mission Canyon Formation Mississippian
Madison Valley Formation Neogene
Madison Valley Equivalent Formation Neogene
Madison Group/Allan Mountain Limestone Carboniferous
Madison Group/Lodgepole Formation Carboniferous
Madison Group/Lodgepole Limestone Carboniferous
Marias River Shale Cretaceous
Meagher Formation Cambrian
Melville Formation Paleogene
Montana Formation Cretaceous
Montana Group/Eagle Sandstone Cretaceous
Montana Group/Hell Creek Formation Cretaceous
Montana Group/Judith River Formation Cretaceous
Montana Group/Two Medicine Formation Cretaceous
Morrison Formation Jurassic
Mowry Shale Cretaceous
Otter Formation Carboniferous
Pagoda Formation Cambrian
Park City Formation Permian
Passamari Formation Paleogene
Passamari Formation Paleogene
Pentagon Formation Cambrian
Phosphoria Formation Permian
Pierre Shale Cretaceous
Pilgrim Formation Cambrian
Polecat Bench Formation Paleogene
Renova Formation Paleogene
Ruby River Basin Group/Renova Formation Paleogene
Sage Creek Formation Paleogene
Sappington Formation Carboniferous, Devonian
Sawtooth Formation Jurassic
Shedhorn Formation Permian
Shedhorn Sandstone Permian
Shell Creek Shale Cretaceous
Sixmile Creek Formation Neogene
Snowy Range Formation Cambrian
St. Mary River Formation Cretaceous
Telegraph Creek Formation Cretaceous
Thaynes Formation Triassic
Thermopolis Shale Cretaceous
Three Forks Formation Devonian
Three Forks Shale Devonian
Tongue River Formation Paleogene
Toston Formation Paleogene
Tullock Formation Paleogene
Two Medicine Formation Cretaceous
Upper Hell Creek Formation Cretaceous
Virgelle Sandstone Cretaceous
White River Formation Paleogene
Willow Creek Formation Cretaceous
Wiota Gravels Quaternary[1]
Wolsey Formation Cambrian
Wolsey Shale Cambrian

See also

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References

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  1. ^ "Geolex — Wiota publications".
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