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Columnar jointed basalt, Southwest Head, Grand Manan, New Brunswick

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Colour photograph of a gray rock cliff
photograph: Columnar jointed basalt, Southwest Head, Grand Manan, New Brunswick, 2011. New Brunswick Museum. The Jurassic basalts on Grand Manan are part of the North Mountain Basalt, formed in a volcanic event preceding the breakup of the supercontinent Pangaea in Early Jurassic time.