Several black coal seams are visible on the steep sandstone bluffs. Only the uppermost (Brunner) seam was to be mined initially, but it was hoped that the lower seams might be worked subsequently.
'Paparoa Range coal seams', URL: https://nzhistory.govt.nz/media/photo/paparoa-range-coal-seams, (Ministry for Culture and Heritage), updated 17-Nov-2015
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