WISCONSIN 



LEGEND 

 PALAEOZOIC 



\\i Limestones and doloiait^s 

 Wtiito eandstones 



Middle 

 liOwor 



Vpper 



Lake Superior £tindetoiM 



MICHIGAN 



PBOTEROZOIC (Algonklnn) 



Aug ■- OroODStonaa 



I ^Sf"?„Y'"*^""'K formation 



( -Ba.ic Inlrusives Acid Kn.stiv„) 



Aum — Miotaigamma alale* 

 AuB — Ferruginous «\ate« 

 ( 0.u«rtzJt« and slotca including Iran Btarinj »om,tU,, 

 Ahgr - Intrueivti Ortmites 



AJihv — HemlorX Volcanics 

 Amg — GretiD$ton«s 

 Ah<i - auiasoEuc SchiaU 



Ams — Einmo alatea 

 Amp - Paint alatea 

 Ahm-Midrlk. Huiunlan slilc 



■ ( QxartzKes iiBd statu indudina Iran Boatins Fbrautu, 



Alsq - Sturgeon (luartaita 



Ais - Saunders Fonnation 

 Air Ahr-K«ndviUa liolomlta 



I ( <kuartuto3,DolomUca, Statu ) 



ARCHEOZOIC 



Laurentiank^'.^ .^'^-J A?gr - Gtonito 

 ( Uranitos and QnciGEes ) 



(OreenSdii 



^ 



.(41ms — Mona Bchiats 

 -4lka - Kitchl Scliiata 

 s and Iron Bearing FormaUono ) 



UndiffoEontiutftcl Pro Cambrian 



Vndiifuientiat^id lltironhm 

 formation not detonninnUo 

 Iron Bearing rormation 

 Magnetic lines 



GEOLOGIC MAP OP PARTS OF MICHIGAN AND WISCONSIN 'fe 



Fir,. 3 



SCALE &III.E3 



