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sandstone quarries zealand. Upper Jurassic stratigraphy, south Kawhia region, New Zealand. New Zealand Journal of Geology and Geophysics, 1995, Vol. 38: 361373 . The overlying 150 m of the sequence consists dominantly of mudstone, siltstone, and rare sandstone. Along Taumatatotara West Road, the formation is 650 m thick and consists .