In 1946 and 1947 the writer had excellent opportunities to study the effect of lateritisation in the course of geological reconnaissances in Northern Australia. From field evidence which has been collected on several aspects of lateritisation - origin, products and relationship to geomorphological processes - a detailed account of lateritisation in Australia can be given. Lateritisation and the occurrence of opal are discussed in this report.

This report comprises notes on the geology, ores reserves, and exploration of the Maude and Yellow Girl Gold Mining Company.

The possibilities of finding evaporite deposits in Queensland were investigated by C.L. Knight and E.K. Sturmfels on a reconnaissance trip from 10th July until 5th August, 1949. The localities where indications of evaporite deposits were found or from which they are reported, are classified on the following pages according to the geological formations, and their position is shown on the accompanying map.

In testing the properties of a bentonic rock from Cardabia by the Sadler's method, the coarsest residue was examined for microfossils. Three samples were examined. A detailed list of the forms noted in each sample is given in this report.

This report, on a collection of rocks made by M.A. Condon from the Northwest Basin, is divided into two sections. Section A gives a detailed description of lithology and the microfaunal content of the samples. Section B comprises stratigraphic and faunal notes.

This report describes the results of a micropalaeontological examination of samples from the Kopperamanna bore.

Results are given of investigations carried out to detect any variation in the relative proportions of the several heavy minerals in heavy concentrates separated out from beach sands of the Broadbeach Recreational Area. The possible variation of the thoria content of monazite in the area is also investigated. Results indicate a systematic variation from east to west in the proportion of Zircon, rutile and ilmenite in the concentrates. The thoria content of the monazite in the area is shown to be constant within experimental limits.

This report describes the results of a micropalaeontological examination of rock samples from the Northwest Basin, Western Australia.

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.

Legacy product - no abstract available