Knox Group
The Knox Group is a widespread geologic group in the Southeastern United States. Though not commonly fossiliferous, it preserves fossils dating back to the Cambrian period. Typical lithologies include thick-bedded cherty dolomites and limestones. Associated minerals include barite, fluorite, lead, and most importantly zinc in the form of the mineral sphalerite. Oil and gas also occur in the Knox Group beneath the Appalachian Plateaus.
| Knox Group | |
|---|---|
| Stratigraphic range: Late Cambrian - Early Ordovician | |
_1_(44862884385).jpg.webp) Sphalerite from the Knox Group, Tennessee | |
| Type | Group |
| Underlies | Chickamauga Group and Wells Creek Formation |
| Overlies | Conasauga Group |
| Lithology | |
| Primary | dolomite |
| Other | Limestone |
| Location | |
| Region | Alabama and West Virginia |
| Country | United States |
| Type section | |
| Named for | Knox County, Tennessee |
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