Harding Sandstone
Stratigraphic range: Ordovician
Type	Formation
Underlies	Fremont Formation
Overlies	Manitou Limestone
Thickness	26 to 46 m (85 to 151 ft)
Lithology
Primary	Sandstone
Other	Siltstone, shale
Location
Region	Central Colorado
Country	United States
Type section
Named for	Harding’s quarry, Fremont County
Named by	Charles D. Walcott (1892)

The Harding Sandstone is a geologic formation in Colorado. It preserves fossils dating back to the Ordovician period.

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

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

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