Geology of Manitoba: Stratigraphy of Manitoba, Volcanism of Manitoba, Canadian Shield, Lake Agassiz, Superior craton, Trans-Hudson orogeny

 
9781155971919: Geology of Manitoba: Stratigraphy of Manitoba, Volcanism of Manitoba, Canadian Shield, Lake Agassiz, Superior craton, Trans-Hudson orogeny
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 28. Chapters: Stratigraphy of Manitoba, Volcanism of Manitoba, Canadian Shield, Lake Agassiz, Superior craton, Trans-Hudson orogeny, Circum-Superior Belt, Western Canadian Sedimentary Basin, Dakota Formation, Woodbend Group, Manitoba Group, Flin Flon greenstone belt, Mackenzie dike swarm, Red River Formation, Stony Mountain Formation, Interlake Formation, Stonewall Formation, Tyndall stone, Lakota Formation, Kazan Region, Kootenai Formation, Bird River greenstone belt, Winnipegosis komatiite belt, Uchi Subprovince, Fox River Belt, Thompson Belt. Excerpt: The Superior craton (or Superior Province) forms the core of the Canadian Shield at the heart of the North American continent. It extends from Quebec in the east to eastern Manitoba in the west. The western margin extends from northern Minnesota through eastern Manitoba to northwestern Ontario. The formation of the Superior craton is best explained within the context of 2.72-2.68 Ga accretion of small continental plates and trapped oceanic terranes in a tectonic regime resembling that of today's rapidly changing southwestern Pacific Ocean. The craton is made up of a collage of small continental fragments of Mesoarchean age and Neoarchean oceanic plates and tracts of oceanic crust that consists of the following domains: Northern Superior, North Caribou, Winnipeg River, Marmion, Minnesota River Valley, Opatica, and Goudalie. These domains are generally separated by greenstone-granite terranes with long strike lengths that record various geodynamic environments, including oceanic floor, plateau, island arc and back-arc settings. Examples include the Oxford-Stull terrane in the north, the western Wabigoon in the west, and the Wawa-Abitibi subprovince in the southeastern Superior Province. A suite of Neoarchean monzodiorite intrusions from greenstone belts of the western Superior prov...

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