This paper describes and gives the percentage composition of the heavy-mineral residues of samples representing about 30 feet of coarse sandstone or grit obtained as core samples from a bore in Permian sediments at Kulnura, New South Wales. A search was made for varietal features of the minerals which might serve to distinguish a particular bed in the Permian of the Hunter River District with which to correlate the beds penetrated by the drill but the investigation was hampered by insufficient specimens of Permian sediments, by the great distance of the bore site from outcropping Permian beds, and by the similarity in heavy-mineral suites of all the Permian beds of the Hunter River District. This same heavy-mineral suite occurs in sediments from the lower Marine (lower Pe mian) to the Upper Triassic sandstones, thus indicating that there was continuous sedimentation in this area during a long period of time. The mineralogy of several members of the upper and lower Marine series is described for the first time, and several lines for further investigation are suggested. The necessity for examining a large number of specimens from well defined beds to obtain reliable mineralogical type residues is stressed as an aid in correlation problems of this nature.