The Coalmont Formation (Tmc) is a

geologic formation A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics ( lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exp ...

that

outcrop An outcrop or rocky outcrop is a visible exposure of bedrock or ancient superficial deposits on the surface of the Earth and other terrestrial planets. Features Outcrops do not cover the majority of the Earth's land surface because in most p ...

s in the North Park intermountain basin in

Colorado Colorado is a U.S. state, state in the Western United States. It is one of the Mountain states, sharing the Four Corners region with Arizona, New Mexico, and Utah. It is also bordered by Wyoming to the north, Nebraska to the northeast, Kansas ...

. It contains

fossil plants Paleobotany or palaeobotany, also known as paleophytology, is the branch of botany dealing with the recovery and identification of plant fossils from geological contexts, and their use for the biological reconstruction of past environments ( pal ...

and

coal Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams. Coal is mostly carbon with variable amounts of other Chemical element, elements, chiefly hydrogen, sulfur, oxygen, and nitrogen. Coal i ...

layers dating back to the

Paleogene The Paleogene Period ( ; also spelled Palaeogene or Palæogene) is a geologic period and system that spans 43 million years from the end of the Cretaceous Period Ma (million years ago) to the beginning of the Neogene Period Ma. It is the fir ...

period Period may refer to: Common uses * Period (punctuation) * Era, a length or span of time *Menstruation, commonly referred to as a "period" Arts, entertainment, and media * Period (music), a concept in musical composition * Periodic sentence (o ...

.Coalmont Formation
at

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.org

Fossil content

The following fossils have been reported from the formation:

Insects

* '' Calandrites hindsi''Cockerell, 1916 * '' ?Calandrites ursorum'' * '' ?Carabites arapahoensis''Cockerell, 1918 * '' Curculio beeklyi'' * '' Ophryastites hendersoni''

Flora

* '' Allantodiopsis erosa'' * '' Ampelopsis acerifolia'' * '' Betula stevensoni'' * '' Carya antiquorum''Brown, 1962 * '' Cercidiphyllum arcticum'' * '' Cissus marginata'' * '' Eucommia serrata'' * '' Fraxinus eocenica'' * '' Glyptostrobus nordenskioldi'' * '' Hydromystria expansa'' * '' Lastrea goldiana'' * '' Laurophyllum perseanum'' * ''

Laurus socialis ''Laurus'' () is a genus of evergreen trees or shrubs belonging to the laurel family, Lauraceae. The genus contains three or more species, including the bay laurel or sweet bay, ''L. nobilis'', widely cultivated as an ornamental plant and a cul ...

'' * '' Lygodium coloradense'' * ''

Metasequoia occidentalis ''Metasequoia occidentalis'' is an extinct redwood species of the family Cupressaceae that is found as fossils throughout the Northern Hemisphere. It is one of three extinct species of ''Metasequoia'' that are currently recognized as valid.Stocke ...

'' * '' Mimosites coloradensis'' * '' Nordenskioldia borealis'' * '' Persea brossiana'' * '' Platanus nobilis'' * '' P. raynoldsi'' * '' Prunus corrugis'' * '' Pterocarya hispida'' * '' Quercus greenlandica'' * '' Q. sullyi'' * '' ?Robinia wardi'' * '' Sassafras thermale'' * '' Sparganium antiquum''

Wasatchian correlations

References

Bibliography

* * * {{citation , last=Cockerell , first=T. D. A , year=1916 , title=Some American fossil insects , journal=

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