Steven Dutch University of Wisconsin - Green Bay
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| Period | Group | Formation | Rock Type |
| Cretaceous? | Windrow | Iron-cemented gravels on hilltops in western Wisconsin |
|
| Mississippian | Reported in small area near Milwaukee in early Survey reports |
||
| Devonian | Kenwood | 55' Shale | |
| Milwaukee | 80' Limestone, some vugs of asphalt. Only hydrocarbons in Wisconsin | ||
| Thiensville | 65' Dolomite | ||
| Lake Church | 35' Dolomite | ||
| Silurian | Waubakee | 30' Dolomite | |
| Racine | 100' Dolomite | ||
| Manistique | 150' Dolomite | ||
| Hendricks | 100' Dolomite | ||
| Byron | 110' Dolomite | ||
| Mayville | 175' Dolomite | ||
| Neda | 0-5' Ooolitic Iron Formation | ||
| Ordovician | Maquoketa (Brainerd) (Fort-Atkinson) (Scales) |
100' Shaly Dolomite 40' Dolomite 100' Mudrock |
|
| Sinnipee | Galena | 200' Dolomite | |
| Decorah | 25' Dolomite, Shale | ||
| Platteville | 100' Dolomite | ||
| Ancell | St. Peter | 0-350' Sandstone | |
| Prairie du Chien | Shakopee | 75' Dolomite, Sandstone | |
| Oneota | 200' Dolomite | ||
| Cambrian | Trempeleau | Jordan | 60' Sandstone |
| St. Lawrence | 50' Dolomite | ||
| Tunnel City | Lone Rock | 0-200' Sandstone, Shale | |
| Mazomanie | 0-200' Sandstone | ||
| Elk Mound | Wonewoc | 100' Sandstone | |
| Bonneterre | 20' Dolomite | ||
| Eau Claire | 250' Sandstone, Shale | ||
| Mt. Simon | 500' Sandstone | ||
| Possibly Latest Precambrian |
Bayfield | Sandstone | |
| Oronto | Sandstone |
PERIOD CONTINENTAL MARGIN ----- CRATON INTERIOR SEQUENCE
(Dashes denote marine deposition)
(Selected Wisconsin formations shown)
=====================================================================
QUATERNARY (Glacial deposits)
==============-------
--------------------- TEJAS
TERTIARY -------
==============-----------------------(Windrow)---------==============
-----------------------------------------
CRETACEOUS -------------------------------- ZUNI
==============--------------------------
-----------
JURASSIC -- ==============
==============----
-------
TRIASSIC --------
==============---------
-------------
PERMIAN --------------------
==============-----------------------------------------
----------------------------------------- ABSAROKA
PENNSYLVANIAN ------------------------------
==============-- ==============
-----------------------------------------
MISSISSIPPIAN -----------------------------------------
------------------------?-?-?------------ KASKASKIA
==============------------------------
DEVONIAN ---------------------
-------- ==============
-----------------------(Kenwood)
==============-----------------------(Racine)----
SILURIAN -----------------------(Hendricks)-------
==============-----------------------(Mayville)--------
-----------------------(Maquoketa)------- TIPPECANOE
-----------------------(Sinnipee)--------
ORDOVICIAN -----------------------(St. Peter)-------
---------- ==============
-----------------------(Prairie du Chien)
==============-----------------------(Jordan)----------
CAMBRIAN -----------------------(Mt. Simon) SAUK
---------------------
--------------
---------
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Created 24 Feb 1997; Last Update Oct. 28, 1997
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