Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: Minnesota tana da wasu duwatsu mafi tsufa na duniya, gneisses waɗanda suke kimanin shekaru biliyan 3.6 (80% kamar yadda duniyar take). Kimanin shekaru biliyan 2.7 da suka gabata, dutsen basaltic ya zubo daga tarkace a cikin dutsen teku na farko; ragowar wannan dutsen mai aman wuta ya kafa Garkuwar Kanada a arewa maso gabashin Minnesota. Tushen wadannan duwatsu masu aman wuta da kuma aikin tekun Precambrian sun kafa Iron Range na arewacin Minnesota. Bayan wani lokaci na volcanism shekaru biliyan 1.1 da suka gabata, aikin ilimin ƙasa na Minnesota ya kasance mai sauƙi, ba tare da volcanism ko kafa dutse ba, amma tare da maimaita kutsawa cikin teku, wanda ya bar ɗakunan dutse da yawa.A cikin 'yan kwanan nan, manyan kankara masu kauri aƙalla kilomita ɗaya sun lalata shimfidar jihar kuma sun sassaka ƙasa. Gishiri na Wisconsin ya bar shekaru 12,000 da suka wuce. Waɗannan glaciers sun rufe dukan Minnesota sai dai a kudu maso gabashin, wani yanki da ke da tuddai masu tsayi da koguna da ke shiga cikin dutsen. An san wannan yankin da Sashin Driftless saboda rashin saurin kankara. Yawancin ragowar jihar a waje da arewa maso gabas suna da ƙafa 50 (mita 15) ko fiye da na glacial har sai da aka bari a baya yayin da glaciers na ƙarshe suka koma baya. An kafa babbar tafkin Agassiz a arewa maso yammacin shekaru 13,000 da suka gabata. Gidansa ya haifar da kwarin Red River mai albarka, kuma fitowar sa, Kogin Warren na glacial, ya sassaƙa kwarin Kogin Minnesota da Upper Mississippi da ke ƙasa daga Fort Snelling. Minnesota tana da kwanciyar hankali a yau; yana fuskantar girgizar ƙasa sau da yawa, kuma yawancin su ƙananan ne.  Tambaya: Shekaru nawa da suka wuce da Wisconsin glaciation bar?
Shekaru 12,000 da suka wuce