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
Group or Formation Period Notes
Alan Mountain LimestoneCarboniferous
Amsden FormationCarboniferous
Arikaree FormationNeogene
Bear FormationPaleogene
Bearpaw FormationCretaceous
Bearpaw ShaleCretaceous
Benton ShaleCretaceous
Big Snowy FormationCarboniferous
Big Snowy Group/Heath FormationCarboniferous
Blackleaf FormationCretaceous
Blacktail Deer Creek FormationCretaceous
Cameron Creek FormationCarboniferous
Castle Reef DolomiteCarboniferous
Claggett FormationCretaceous
Claggett ShaleCretaceous
Climbing Arrow FormationPaleogene
Cloverly FormationCretaceous
Cody ShaleCretaceous
Colorado Group/Belle Fourche FormationCretaceous
Cook Ranch FormationPaleogene
Deadwood FormationOrdovician, Cambrian
Dearborne LimestoneCambrian
Deep River FormationNeogene
Dell Beds FormationPaleogene
Dinwoody FormationTriassic
Dunbar Creek FormationPaleogene
Eagle FormationCretaceous
Ellis FormationJurassic
Flaxville Gravels FormationNeogene
Fort Union FormationPaleogene, Cretaceous
Fort Union No. 3 Beds (Melville) FormationPaleogene
Fort Union Group/Tullock FormationPaleogene
Fox Hills SandstoneCretaceous
Graneros ShaleCretaceous
Greyson ShalePrecambrian
Hell Creek FormationPaleogene, Cretaceous
Hepburn's Mesa FormationNeogene
Horsethief FormationCretaceous
Jefferson FormationDevonian
Judith River FormationCretaceous
Kishenehn FormationPaleogene
Kootenai FormationCretaceous
Lance FormationCretaceous
Lebo FormationPaleogene
Livingston FormationPaleogene
Lodgepole LimestoneCarboniferous
Ludlow FormationPaleogene
Madison Group/Lodgepole and Mission Canyon FormationMississippian
Madison Valley FormationNeogene
Madison Valley Equivalent FormationNeogene
Madison Group/Allan Mountain LimestoneCarboniferous
Madison Group/Lodgepole FormationCarboniferous
Madison Group/Lodgepole LimestoneCarboniferous
Marias River ShaleCretaceous
Meagher FormationCambrian
Melville FormationPaleogene
Montana FormationCretaceous
Montana Group/Eagle SandstoneCretaceous
Montana Group/Hell Creek FormationCretaceous
Montana Group/Judith River FormationCretaceous
Montana Group/Two Medicine FormationCretaceous
Morrison FormationJurassic
Mowry ShaleCretaceous
Otter FormationCarboniferous
Pagoda FormationCambrian
Park City FormationPermian
Passamari FormationPaleogene
Passamari FormationPaleogene
Pentagon FormationCambrian
Phosphoria FormationPermian
Pierre ShaleCretaceous
Pilgrim FormationCambrian
Polecat Bench FormationPaleogene
Renova FormationPaleogene
Ruby River Basin Group/Renova FormationPaleogene
Sage Creek FormationPaleogene
Sappington FormationCarboniferous, Devonian
Sawtooth FormationJurassic
Shedhorn FormationPermian
Shell Creek ShaleCretaceous
Sixmile Creek FormationNeogene
Snowy Range FormationCambrian
St. Mary River FormationCretaceous
Telegraph Creek FormationCretaceous
Thaynes FormationTriassic
Thermopolis ShaleCretaceous
Three Forks FormationDevonian
Three Forks ShaleDevonian
Tongue River FormationPaleogene
Toston FormationPaleogene
Tullock FormationPaleogene
Two Medicine FormationCretaceous
Upper Hell Creek FormationCretaceous
Virgelle SandstoneCretaceous
White River FormationPaleogene
Willow Creek FormationCretaceous
Wiota GravelsQuaternary[1]
Wolsey FormationCambrian
Wolsey ShaleCambrian

See also

References
  1. https://ngmdb.usgs.gov/Geolex/UnitRefs/WiotaRefs_11212.html
  • 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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