Orr Formation
The Orr Formation is a geologic formation in Utah. It preserves fossils dating back to the Cambrian period.[1]
| Orr Formation | |
|---|---|
| Stratigraphic range: Cambrian | |
_3_(44840227425).jpg.webp) Stromatolitic limestone (Big Horse Limestone Member; Utah) | |
| Type | Geological formation |
| Sub-units | Big Horse Limestone Member |
| Thickness | 1,825 feet[1] |
| Location | |
| Region |  Utah |
| Country |  United States |
| Extent | House Range |
| Type section | |
| Named for | Orr Ridge |
| Named by | Charles D. Walcott[1] |
| Year defined | 1910[1] |
References
- Walcott, Charles D. (1910). "Nomenclature of some cambrian cordilleran formations". Smithsonian Miscellaneous Collections. 53 (1): 1–12.
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.
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