Lyons Formation
Lyons Sandstone is a geological layer formed during the Paleozoic Era, Middle Permian Period about 250 million years ago. This layer is also referred to as the Lyons Formation. It is the result of fine-grained quartz sand dunes compressing into sandstone. This layer is visible along the Front Range of the Colorado Rocky Mountains.
| Lyons Sandstone Stratigraphic range: Guadalupian | |
|---|---|
 Buff and pink rocks typical of The Lyons Formation seen on the right at Roxborough State Park near Littleton, Colorado | |
| Type | sedimentary |
| Underlies | Lykins Formation |
| Overlies | Fountain Formation |
| Thickness | 50-220 ft |
| Lithology | |
| Primary | sandstone, conglomerate |
| Location | |
| Region | Denver Basin |
| Extent | Colorado, Wyoming |
| Type section | |
| Named for | Lyons, Colorado |
The stone quarried from this layer was used to build many buildings on the University of Colorado - Boulder campus.[1]
External links
- Colorado Mountain Presentation
- Geology of Colorado (Boulder Valley)
- Geologic History of the Boulder Area
- The Horsetooth Quadrangle Virtual Geological Field Trip
- USGS Geolex Database: Lyons
- Roxborough State Park Geology
- Fountain Formation
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