A bed of streaky grey to black gypsum is exposed at Chipka Creek near Wardner. It is exposed over a width of about 12 metres as a bedded deposit in limestone within Upper Devonian Fairholme Group evaporitic sediments and limestones. A surface sample (weathered) assayed 10.2 per cent insolubles, 63.2 per cent CaSO4, 12.4 per cent CaCO3, 9.5 per cent MgCO3, 1 per cent Fe2O3+Al2O3, 1 per cent soda and 29.4 per cent total SO3.