Maquoketa Formation, Group

Geology

Group: Maquoketa

Formations: Maquoketa (1)

Members: unnamed (7), basal (1), Brainard (4), Clermont (4), Elgin (7)

Lithologies: not reported (4), "shale" (13), wackestone (2), "limestone" (14), dolomite (1), phosphorite (1)

Paleoenvironments: marine indet. (5), carbonate indet. (12), shallow subtidal indet. (3), deep subtidal ramp (1), offshore indet. (2)

Age range: base of the Edenian to the top of the Richmondian or 451.00000 to 445.50000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Edenian451.0 - 450.2USA (Iowa) (24170)
Edenian - Maysvillian451.0 - 449.6USA (Minnesota, Iowa, Wisconsin, Illinois) (23554)
Edenian - Maysvillian451.0 - 449.6USA (Minnesota) (23191 23409 23603 23741 120503 120504 120505)
Maysvillian450.2 - 449.6USA (Iowa) (13261)
Maysvillian450.2 - 449.6USA (Minnesota) (23196 23410 23607 23744)
Maysvillian - Richmondian450.2 - 445.5USA (Minnesota) (28017)
Richmondian449.6 - 445.5USA (Iowa) (421 356 13259 13260 164471)
Richmondian449.6 - 445.5USA (Illinois) (396 173283)
Richmondian449.6 - 445.5USA (Minnesota) (358)