Coalmont Formation | |
---|---|
Stratigraphic range: Paleocene-Wasatchian ~ | |
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°W |
Approximate paleocoordinates | 45°00′N 90°18′W / 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] |
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]
The following fossils have been reported from the formation:[3]
Formation | Wasatch | DeBeque | Claron | Indian Meadows | Pass Peak | Tatman | Willwood | Golden Valley | Coldwater | Allenby | Kamloops | Ootsa Lake | 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 | Princeton | Buck Creek | Nechako | Sverdrup | Potomac | GoM | Laguna Salada | Rio Grande | North Park | Raton | Galisteo | San Juan | ||
Country | United States | Canada | United States | Mexico | United States | |||||||||||||||||
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 |