siliceous sandstoneAmherst sandstoneAquia Creek sandstoneDunville sandstonePotsdam sandstoneStancliffe sandstonesandstone by composition: aggregate typeorthoquartziteorthoquartzitessandstone, silicasandstone, siliceoussandstones, silicasandstones, siliceoussilica sandstonesilica sandstonessiliceous sandstones