Stratigraphic range: Paleocene-Wasatchian
Coalmont Formation, Jackson County, Colorado
|Underlies||North Park Formation|
|Thickness||9,000 feet (2,700 m)|
|Other||Clay, Shale, Coal|
|Extent||North Park intermountaine basin|
|Named for||Coalmont, Jackson County, Colorado|
|Named by||A. L. Beekly|
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.
The following fossils have been reported from the formation:
|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 |
| Piceance |
|Williston||Okanagan||Princeton||Buck Creek||Nechako||Sverdrup||Potomac||GoM||Laguna Salada||Rio Grande||North Park||Raton||Galisteo||San Juan|
|Environments||Alluvial-fluvio-lacustrine||Fluvial||Fluvial||Fluvio-lacustrine||Fluvial||Lacustrine||Fluvio-lacustrine||Deltaic-paludal||Shallow marine||Fluvial||Shallow marine||Fluvial||Fluvial|
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