John A. Percival, Howard R. Williams; Late Archean Quetico accretionary complex, Superior province, Canada. Geology ; 17 (1): 23–25. doi: https://doi.org/10.1130/0091-7613(1989)017<0023:LAQACS>2.3.CO;2
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The 1200-km-long Quetico subprovince consists of monotonous metagraywacke, with derived migmatite and granite, in thrust and/or transcurrent fault contact with the adjacent Wabigoon and Wawa metavolcanic subprovinces. Imbrication of sedimentary wedges derived from volcanic arcs to the north and south produced a 10-100-km-wide, stratigraphically north-facing pile. Thermal relaxation in the 20 m.y. following accretion of the southern arc resulted in melting of the accretionary pile to produce peraluminous granite and associated low-pressure metamorphism.