Knox Group

Geology

Formations: Chepultepec (1), Copper Ridge (1), Cotter (7), Newala (1), Roubidoux (1)

Lithologies: "limestone" (4), dolomite (8), chert (1)

Paleoenvironments: carbonate indet. (10), shallow subtidal indet. (1)

Age range: base of the Skullrockian to the top of the Tithonian or 488.90000 to 143.10000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Trempealeauan490.2 - 486.85USA (Alabama) (157241)
Skullrockian - Stairsian488.9 - 481.7USA (Tennessee) (189308)
Tremadocian486.85 - 477.1USA (Tennessee) (189226)
Floian477.1 - 471.3USA (Tennessee) (189129 189130 189132 189133 189284)
Floian477.1 - 471.3USA (Virginia) (189278 189285)
Blackhillsian475.3 - 471.3USA (Georgia) (164676)
Tithonian149.2 - 143.1USA (California) (228991)