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Precambrian – Cambrian terrane contact, Reversing Rapids, Saint John, New Brunswick

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Colour photograph of bridge steelwork, river and rock face with red line showing division of terrain
photograph: Precambrian – Cambrian terrane contact, Reversing Rapids, Saint John, New Brunswick, 2009. New Brunswick Museum. At the Reversing Rapids in Saint John the gorge exposes Precambrian grey rocks of the Brookville Terrane below the bridge and black rocks of the Avalon Composite Terrane downriver. The Caledonia Fault lies along the contact of the two terranes.