For the purpose of obtaining a general understanding of the geology of North Stradbroke Island, field work was carried out on the island from January 8th to February 17th, 1948. Altimeter traverses were made from Dunwich, Amity, Point Lookout and Blue Lake, and from the connecting roads. The southern portion was covered from landing points on the west coast near Russel Island. The results of observations were plotted on to Military Map Queensland Zone 8, No. 182 (Brisbane Valley). Altimeter readings were corrected from the readings of a weekly barograph stationed at Dunwich, on the western side of the island. This report is comprised in two parts. In Part I, the physiography and the geology of the island are described. In Part II, an account is given of the history of the development of the island.

This report describes the results of a micropalaeontological examination of samples taken from bores at Bond Springs, Northern Territory.

This report describes the results of a micropalaeontological examination of samples taken from the depth of 1,260 to 1,480 feet down. This series is in continuation of that reported upon in Records 1948/065 and 1948/050.

A site for a National Park Reserve is proposed at the head of the Tidbinbilla River, and a Zoological Park is planned, within the city limits, between Yarralumla Nursery and the Molonglo River. The Department of the Interior has requested geological information on these sites with special reference to supply of building stone. The geology of the proposed sites is described in this report. Possible sources of building stone in the vicinity of these sites are considered.

This report is a summarised account of an investigation into the heavy mineral content of three bores, put down by the Roma Blocks Oil Company. The positions of the bores and a short account of the geology of the area are given, together with results of the work to date, and an evaluation of the prospects of correlation by petrological means.

The Nerrima dome is situated in an area of gentle folding 90 miles south-east of Derby in the Kimberley Division of Western Australia. The topography is essentially flat with local ridges formed over the more resistant sandstone beds of the Liveringa Formation. Outcropping formations are Permian and include the lower part of the Liveringa and the top part of the Noonkanbah Formations. The Liveringa Formation consists mainly of sandstones and grits and forms ridges which practically surround the structure; the Noonkanbah is mainly clays and limestones which have been reduced to flat plains with low outcrops of limestone and calcareous sandstone. Vertical closure of the structure is about 250 feet over an area of 30 square miles. The cores of Nerrima No. 1 Bore have been examined and at the present depth of 4271 feet the bore appears to be still in Permian rocks although no reliable interpretation of the subsurface geology at Nerrima can be made without further detailed information from areas to the north.

An inspection of radioactive minerals was conducted in the Marble Bar area. The localities of Wodgina, Mount Francisco, Pilgangoora, Alisa Downs, Trig Hill and Cooglegong were visited. Occurrences of monazite, yttrotantalite, pilbarite and radio-active columbite were investigated and samples collected for further examination. An account of the inspection and subsequent findings is given in this report.

This report provides an overview of copper mining production in the Northern Territory between 1885 and 1947. Production, distribution, and economic considerations are generally discussed, and the principle copper producing mines are described in some detail. This description includes details of the geology and working of the lodes, ore grade, and recorded production figures.

Legacy product - no abstract available

The area under investigation forms a portion of a coastal sandy belt 1,500 to 2,000 feet wide, which extends from Main Beach (Southport) to South Nobby (North Burleigh), and is about 5 to 15 feet higher than the low-lying coastal plains adjoining it on the west. The known deposits and probably all of the deposits of heavy minerals between Southport and North Burleigh occur either on the present sea beaches or in the eastern half of the sandy belt. Preliminary boring and sampling of the area was carried out early in 1948. Bores were put down to water level using a post hole auger. When the sand brought up from a borehole appeared to contain appreciable quantities of heavy minerals it was sampled by quartering. An account of the investigation is set down in this report. The distribution of heavy minerals and the tonnages available for mining are shown on the accompanying geological plans. Estimates of the quantities of heavy minerals have been tabulated.