| 词条 | Knox Group |
| 释义 |
| name = Knox Group | image = | caption = | type = Group | age = Late Cambrian - Early Ordovician | period = Paleozoic | prilithology = Dolostone | otherlithology = Limestone | namedfor = Knox County, Tennessee | namedby = | region = Alabama and West Virginia | country = United States | coordinates = | unitof = | subunits = | underlies = Chickamauga Group and Wells Creek Formation | overlies = Conasauga Group | thickness = | extent = | area = | map = | map_caption = }} 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. See also{{Portal|Earth sciences|Alabama|Paleontology|Cambrian|Paleozoic}}
References
4 : Geologic formations of Alabama|Geologic formations of Tennessee|Cambrian West Virginia|Ordovician West Virginia |
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