“Mount Harris is of basaltic formation, but I could not observe any columnar regularity in it, although large blocks are exposed above the ground. The rock is extremely hard and sonorous.” HardRocksBlockExposedFormationRegularity Book:Two expeditions into the interior of Southern Australia: during the years 1828, 1829, 1830 and 1831 with observations on ... New South Wales Source: Two expeditions into the interior of Southern Australia: during the years 1828, 1829, 1830 and 1831 with observations on ... New South Wales
