| Crab Orchard Formation | |
| Type: | Formation |
| Age: | Telychian-Aeronian |
| Period: | Aeronian |
| Region: | Kentucky |
| Underlies: | Bisher Formation |
| Overlies: | Brassfield Formation |
The Crab Orchard Formation is a geologic formation in Kentucky, United States. It dates back to the Telychian to Aeronian stages of the Silurian period.[1]