Hermosa Group

The Hermosa Group is a group of geologic formations in Utah and Colorado. It preserves fossils dating back to the Carboniferous period.

Hermosa Group
Stratigraphic range: Carboniferous
Hermosa Formation near its type section, Hermosa, Colorado, US
Type	Group
Sub-units	Honaker Trail Formation Paradox Formation Pinkerton Trail Formation
Underlies	Cutler Group
Overlies	Molas Formation
Lithology
Primary	mudstone
Other	shale, limestone
Location
Coordinates	37.431°N 107.837°W / 37.431; -107.837
Region	Utah
Country	United States
Type section
Named for	Hermosa Creek
Named by	Cross and Spencer
Year defined	1899

Hermosa Formation exposed in a roadcut near Rico, Colorado.

See also

• Earth sciences portal
• Utah portal
• Paleontology portal

• List of fossiliferous stratigraphic units in Utah
• Paleontology in Utah

References

• "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 25 March 2022. Retrieved 17 December 2021.