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This collection of fossils from the Portland area consists chiefly from mollusca, but where a small portion of sediment was attached to the fossils, it was removed and washed down for micro-examination. The number given to each sample refers to the registered number in the Victorian Geological Survey Collection. The results of the examination are recorded in this report.

A visit of one month was paid by the writer to the North-West Basin and the Fitzroy area of the Desert Basin. It is largely due to the careful planning of the excursions by the Senior Geologists in charge that a coherent picture of the stratigraphical and tectonical conditions was obtained within the comparatively short time at disposal. This note contains a few remarks on the stratigraphy and tectonics of both areas in connection with oil prospects.

The Walloway Artesian Basin is approximately 160 miles north of Adelaide and is traversed by the main road from Adelaide to Maree via Orroroo and Hawker. The town of Orroroo lies on its western margin in the south-western corner of the Hundred of Walloway and the village of Johnburgh is situated in its northern part. The geophysical survey was carried out at the request of the Director of Mines for South Australia to assist his Department in the selection of sites for boring for artesian water and to delineate more precisely the limitations of the basin with regard to artesian flows. The gravity method was used as this method has proved successful elsewhere in determining the dimensions and form of sedimentary basins. This report gives an account of the survey and its results.

This report contains the results of a brief examination carried out from 1st to 7th October 1950 at Maranboy, Northern Territory, by the writer and Dr. J. Sleis, Geologist, who were assisted by the Inspector of Mines, Mr. W.A. McDonald. The purpose of this examination was to obtain the necessary data for a preliminary assessment of the tinfield based on the ore developed and won to date.

The request for a geophysical survey was made by Renison Associated Tin Mines N.L. through the Director of the Tasmanian Mines Department. The purpose of the survey was to explore for additional ore-bodies within an area of interest, occupying approximately 9.5 square miles. The present work was confined to an area near the Renison Bell main lode and situated on the northern slope of the Renison Bell Hill. Its purpose was to test the magnetic and self-potential methods over known ore-bodies and to apply these methods in the search for further bodies in the immediate vicinity.

This report comprises descriptions of certain rocks collected by Dr. H.G. Raggatt in the Torquay - Airey's Inlet area, Victoria. The rocks are isolated specimens and no general conclusions applicable to the group as a whole have been drawn.

Tamborine Mountain lies about 35 miles south-south-east from Brisbane. Laterite occurs in the north-western portion of the mountain and in general occupies the more elevated areas. The bauxite deposits have been known for many years and have been exploited as a source of road metal and more recently for the manufacture of aluminium sulphate. The occurrences have been described briefly by Ball (1940), Curteis (1942), and Connah (1950). Mr. W.S. Curteis conducted testing operations by shaft-sinking on behalf of Messrs. Sulphates Limited. The results of this work have been made available to the writer by the Company and have been used herein. During June 1950 the writer accompanied Mr. T.H. Connah to Tamborine Mountain during a very short visit, and again examined the area in November. The geology of the area, bauxite, and bauxite reserves at Tamborine Mountain are described in this report.

The island of Timor has attracted the attention of geologists for more than one hundred years. The first geological investigations were carried out on behalf of the Government of the Netherlands East Indies as early as 1829. This report has been compiled using information obtained during previous geological investigations, and the data supplied in existing geological reports, and comprises notes on the stratigraphy and structure of the island, with reference to oil prospects.

During the period 10th October to 15th November 1950, the writer visited the Rum Jungle area in order to direct the local and regional geological mapping, with a view to establishing the geological relationship between the various prospects, the manner of occurrence of the ore bodies, and if possible the control of mineralisation. Owing to the short time available for the field work, the present report must be regarded as a critical preliminary study of the area to aid future planning, rather than a complete investigation. Only the broader aspects of mineralisation are dealt with in this report.