Coalmont Formation
Coalmont Formation Stratigraphic range: Paleocene-Wasatchian ~ | |
---|---|
![]() Coalmont Formation, Jackson County, Colorado | |
Type | Formation |
Underlies | North Park Formation |
Overlies | Cretaceous strata[1] |
Thickness | 9,000 feet (2,700 m)[1] |
Lithology | |
Primary | Sandstone |
Other | Clay, Shale, Coal |
Location | |
Coordinates | 40°24′N 106°30′W / 40.4°N 106.5°WCoordinates: 40°24′N 106°30′W / 40.4°N 106.5°W |
Approximate paleocoordinates | 45°00′N 90°18′W / 45.0°N 90.3°W |
Region | Colorado |
Country | ![]() |
Extent | North Park intermountaine basin |
Type section | |
Named for | Coalmont, Jackson County, Colorado[2] |
Named by | A. L. Beekly[2] |
![]() ![]() Coalmont Formation (the United States) ![]() ![]() Coalmont Formation (Colorado) |
The Coalmont Formation (Tmc) is a geologic formation that outcrops in the North Park intermountaine basin in Colorado. It contains fossil plants and coal layers dating back to the Paleogene period.[3]
Fossil content[]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/c/c3/USGS_North_Park_Basin_geologic_map.png/250px-USGS_North_Park_Basin_geologic_map.png)
Geologic map of the North Park Basin with the Coalmont Formation indicated in light green (Tmc)
The following fossils have been reported from the formation:[3]
Insects[]
Flora[]
- [6]
- Ampelopsis acerifolia[6]
- [6]
- [6]
- Cercidiphyllum arcticum[6]
- Cissus marginata[6]
- Eucommia serrata[6]
- Fraxinus eocenica[6]
- Glyptostrobus nordenskioldi[6]
- Hydromystria expansa[6]
- [6]
- [6]
- [6]
- Lygodium coloradense[6]
- Metasequoia occidentalis[6]
- [6]
- [6]
- [6]
- [6]
- [6]
- [6]
- Pterocarya hispida[6]
- [6]
- [6]
- ?Robinia wardi[6]
- [6]
- Sparganium antiquum[6]
Wasatchian correlations[]
Formation | Wasatch | DeBeque | Claron | Indian Meadows | Pass Peak | Tatman | Willwood | Golden Valley | Coldwater | Allenby | Margaret | Nanjemoy | Hatchetigbee | Tetas de Cabra | Hannold Hill | Coalmont | Cuchara | Galisteo | San Jose | Ypresian (IUCS) • Itaboraian (SALMA) Bumbanian (ALMA) • Mangaorapan (NZ) | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basin | Powder River Uinta Piceance Colorado Plateau Wind River Green River Bighorn |
Piceance |
Colorado Plateau |
Wind River |
Green River |
Bighorn |
Williston | Okanagan | Rio Grande | North Park | Raton | Galisteo | San Juan | |||||||||
Country | ![]() |
![]() |
![]() |
![]() |
![]() | |||||||||||||||||
Copelemur | ![]() |
![]() |
![]() |
![]() | ||||||||||||||||||
Coryphodon | ![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() | ||||||||||||
Diacodexis | ![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() | |||||||||||||||
Homogalax | ![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
|||||||||||||||
Oxyaena | ![]() |
![]() |
![]() |
![]() |
![]() | |||||||||||||||||
Paramys | ![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() | |||||||||||||
Primates | ![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() | |||||||||||||||
Birds | ![]() |
![]() |
![]() |
![]() |
![]() |
|||||||||||||||||
Reptiles | ![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() | |||||||||||||||
Fish | ![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
|||||||||||||||
Insects | ![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
||||||||||||||||
Flora | ![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
|||||||||||||
Environments | Alluvial-fluvio-lacustrine | Fluvial | Fluvial | Fluvio-lacustrine | Fluvial | Lacustrine | Fluvio-lacustrine | Deltaic-paludal | Shallow marine | Fluvial | Shallow marine | Fluvial | Fluvial | ![]() ![]() ![]() | ||||||||
Volcanic | Yes | No | Yes | No | Yes | No | Yes | No | Yes | No |
See also[]
References[]
- ^ a b Hail, W.J. and Leopold, E.B., 1960. Paleocene and Eocene age of the Coalmont Formation, North Park, Colorado. Geological Survey Professional Paper, 400-B, pp.B260-B261.
- ^ a b Beekly, A.L., 1915. Geology and coal resources of North Park, Colorado. U.S. Geological Survey Bulletin, 596, 121 p
- ^ a b Coalmont Formation at Fossilworks.org
- ^ a b Cockerell, 1916
- ^ a b c d Cockerell, 1918
- ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa Brown, 1962
Bibliography[]
- . 1962. Paleocene flora of the Rocky Mountains and Great Plains. 375. 1–119.
- Proceedings of the United States National Museum 54. 301–311. . 1918. New species of North American fossil beetles, cockroaches, and tsetse flies.
- Proceedings of the United States National Museum 51. 89–106. . 1916. Some American fossil insects.
Categories:
- Geologic formations of Colorado
- Eocene Series of North America
- Paleocene Series of North America
- Paleogene Colorado
- Ypresian Stage
- Thanetian Stage
- Wasatchian
- Coal formations
- Coal in the United States
- Sandstone formations of the United States
- Fluvial deposits
- Paleontology in Colorado