Coalmont Formation
Geologic formation in Colorado, US
From Wikipedia, the free encyclopedia
The Coalmont Formation (Tmc) is a geologic formation that outcrops in the North Park intermountain basin in Colorado. It contains fossil plants and coal layers dating back to the Paleogene period.[3]
.jpg)
TypeFormation
UnderliesNorth Park Formation
OverliesCretaceous strata[1]
Thickness9,000 feet (2,700 m)[1]
| 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 | 40.4°N 106.5°W |
| Approximate paleocoordinates | 45.0°N 90.3°W |
| Region | Colorado |
| Country | United States |
| Extent | North Park intermountain basin |
| Type section | |
| Named for | Coalmont, Jackson County, Colorado[2] |
| Named by | A. L. Beekly[2] |
  Coalmont Formation (the United States)  Coalmont Formation (Colorado) | |
Fossil content
The following fossils have been reported from the formation:[3]
Insects
Flora
- Allantodiopsis erosa[6]
- Ampelopsis acerifolia[6]
- Betula stevensoni[6]
- Carya antiquorum[6]
- Cercidiphyllum arcticum[6]
- Cissus marginata[6]
- Eucommia serrata[6]
- Fraxinus eocenica[6]
- Glyptostrobus nordenskioldi[6]
- Hydromystria expansa[6]
- Lastrea goldiana[6]
- Laurophyllum perseanum[6]
- Laurus socialis[6]
- Lygodium coloradense[6]
- Metasequoia occidentalis[6]
- Mimosites coloradensis[6]
- Nordenskioldia borealis[6]
- Persea brossiana[6]
- Platanus nobilis[6]
- P. raynoldsi[6]
- Prunus corrugis[6]
- Pterocarya hispida[6]
- Quercus greenlandica[6]
- Q. sullyi[6]
- ?Robinia wardi[6]
- Sassafras thermale[6]
- Sparganium antiquum[6]
