Palaeontologia Novae Cambriae Meridionalis—occasional descriptions of New South Wales fossils—No. 6
At Mount Wilson, on Dunlop Holding, about thirty miles north-west of Dunlop Homestead, Darling River, a well was sunk previous to 1881, to a depth of about five hundred feet, as a means of water supply. In 1903 I visited the locality and found the surroundiug spoil heaps in a great measure composed of a blue calcareous mudstone. This matrix is crammed with broken valves and shell fragments of a small bivalve, so plentiful as to almost form a "musselband," and certainly a good "horizon-indicator" in this portion of our Lower Cretaceous.