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Chronostratigraphy of Minnesota
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v
t
e
Chronostratigraphy
of
Minnesota
Ph
Cz
Q
Glacial and post-glacial unconsolidated deposits
Mz
K
Upper
Coleraine Formation
Windrow Formation
unnamed Upper? Cretaceous formations, western and southeastern Minnesota
Pz
D
Upper
Frasnian
Lithograph City Formation
(in part)
Middle
Givetian
Coralville Formation
Lithograph City Formation
(in part)
Little Cedar Formation
Pinicon Ridge Formation
Eifelian
Spillville Formation
O
Upper
Cummingsville Formation
Decorah Shale
Dubuque Formation
Glenwood Formation
Maquoketa Formation
Platteville Formation
Prosser Formation
Red River Formation
(subsurface only)
St. Peter Sandstone
(in part)
Stewartville Formation
Winnipeg Formation
(subsurface only)
Middle
Darriwilian
St. Peter Sandstone
(in part)
Lower
Tremadocian
Oneota Dolomite
(
Prairie du Chien Group
)
Shakopee Formation
(
Prairie du Chien Group
)
Є
Furongian
Davis Formation
Jordan Sandstone
Lone Rock Formation
(
Tunnel City Group
, former
Franconia Formation
)
Mazomanie Formation
(
Tunnel City Group
, former
Franconia Formation
)
St. Lawrence Formation
Wonewoc Sandstone
(Galesville Sandstone in part, all Ironton Sandstone)
Series 3
Bonneterre Formation
Eau Claire Formation
Mt. Simon Sandstone
Wonewoc Sandstone
(Galesville Sandstone in part)
pЄ
♇
Y
Fond du Lac Formation
Hinckley Sandstone
North Shore Volcanic Group
Puckwunge Conglomerate
Solor Church Formation
(subsurface only)
X
Biwabik Formation
Gunflint Formation
Kakabeka Formation
Mahnoman Formation
Pokegama Formation
Rabbit Lake Formation
Rove Formation
Sioux Quartzite
Thomson Formation
Trommald Formation
Virginia Formation
