Maquoketa Formation, Group

Geology

Group: Maquoketa

Formations: unnamed (1), Brainard (4), Brainard Shale (3), Elgin (1), Fort Atkinson (7), Fort Atkinson Limestone (3), Maquoketa (1), Neda (2), Scales (4), Scales Shale (22)

Members: Brainard (1)

Lithologies: not reported (1), "shale" (17), wackestone (3), grainstone (2), "limestone" (22), dolomite (5)

Paleoenvironments: marine indet. (3), carbonate indet. (34), shallow subtidal indet. (4), deep subtidal ramp (1), deep subtidal shelf (1), deep subtidal indet. (1), offshore (1)

Age range: base of the Maysvillian to the top of the Richmondian or 450.20000 to 445.50000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Edenian - Maysvillian451.0 - 449.6USA (Iowa) (23235 120502)
Edenian - Maysvillian451.0 - 449.6USA (Illinois, Iowa) (23521 23682 23810)
Edenian - Maysvillian451.0 - 449.6USA (Illinois, Iowa, Wisconsin) (23783)
Maysvillian450.2 - 449.6USA (Iowa) (23236 23237 26683 184440 192085)
Maysvillian450.2 - 449.6USA (Illinois, Iowa) (23522 23524 23684 23811)
Maysvillian450.2 - 449.6USA (Illinois, Iowa, Wisconsin) (23784 23785)
Maysvillian450.2 - 449.6USA (Minnesota) (23283)
Maysvillian - Richmondian450.2 - 445.5USA (Minnesota) (357 192175)
Richmondian449.6 - 445.5USA (Illinois, Iowa) (23534 23546)
Richmondian449.6 - 445.5USA (Illinois, Iowa, Wisconsin) (23786 23787)
Richmondian449.6 - 445.5USA (Wisconsin) (75744)
Richmondian449.6 - 445.5USA (Iowa, Illinois) (28166)
Richmondian449.6 - 445.5USA (Minnesota) (155710)
Richmondian449.6 - 445.5USA (Illinois) (26684 28167 192093)
Richmondian449.6 - 445.5USA (Iowa) (13200 13204 23238 183357 183359 164471 172795 173365 192102 192092 192094 192095 192096 192901 192902 197197 204093 219794)