This report describes the results of a micropalaeontological examination of three rock samples from the Poole Range area.

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.

The Great Cobar ore deposit was discovered in 1870. Production commenced in 1871 and since that date mining at Cobar has been more or less continuous. The field has produced copper, gold, and silver to the value of approximately £A27,000,000. Cobar has been the most important producer of copper in New South Wales, and in recent years, has also been the most important gold-mining centre. The Zinc Corporation Limited is carrying out, with the aid of the Bureau, an extensive geological and geophysical examination of the area, with the hope of finding other orebodies. The Bureau itself has extended geological mapping over an area of approximately 2,000 square miles in the Cobar-Nymagee-Canbelego district with the ultimate aim of discovering other ore deposits, or even fields of the Cobar type. In the Nymagee district, North Broken Hill Limited is also carrying out, in co-operation with the Bureau, an extensive exploration programme. The history, production, reserves and prospects of the New Occidental, Chesney, and New Cobar mines are discussed 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.

This report describes the findings of a micropalaeontological examination of a small collection of limestones from Cape Range, Rough Range and Learmonth Aerodrome, Northwestern Australia. The collection is characteristic of the Tertiary deposits of the North West Basin. The majority of the limestones belong to the "f" stage (Middle Miocene) of the Netherlands East Indies "letter" classification but the shelly limestone from Rough Range, in the absence of zonal Miocene foraminifera is regarded as Lower Pliocene. A detailed palaeontological description of these samples is given in this report.

The field season in the Kimberley Division of Western Australia for the year 1948 extended from May 2nd to October 15th. It is estimated that about four weeks of this time was spent in activities not directly related to geological work. Three distinct areas were covered during the season, these being Dampier Land, Mt. Ramsay Area, and Nerrima Structure. An account is given of the personnel involved and the work completed within each area.

The Provisional Administration of the Territories of Papua and New Guineas is investigating the possibility of manufacturing portland cement in the vicinity of Moresby and the question of supply of raw materials in that area has been referred to the Bureau of Mineral Resources. No field investigations into the supply and distribution of these materials has yet been undertaken, and these preliminary notes have been compiled from geological data and observations made available from previous geological reports. The raw materials from which portland cement is produced are limestone clay or shale and a small quantity of iron oxide. The availability and suitability of rock materials for cement manufacture in the Port Moresby area are discussed at length in this report. The general geology of the area and the availability of other materials required for the manufacturing process are briefly described.

The survey of Dampier Land was undertaken to investigate the extent of the Mesozoic deposits, which were previously known to exist from the information obtained from deep water bores at Broome and near Derby, and as surface outcrops at Point Torment, north of Derby. A series of reconnaissance traverses was made in an effort to visit all known rock exposures. The town of Broome was used as a base for the reconnaissance. Areas, including Mount Clarkson, Mount Jowlaenga, Cape Leveque and the Sunday Islands were visited during the investigation. This report comprises detailed descriptions of the topography, general geology, micropalaeontology, structural geology, geological history, and petroleum prospects of the areas investigated.

This note concerns the request by the Midland Mining Co. Ltd. for financial assistance in the development of a deposit of kyanite to the north of Yanmah, in the Southern Division of Western Australia. The report comprises brief notes on the geology of the area, proposed work, and the occurrence of kyanite as these relate to the proposed further development of the deposit.

The Wolf Creek Crater is the second largest crater of meteoritic origin to be discovered on the earth's surface. An outline of the history of the discovery and the situation of the crater is given in this report. A general description of the crater is presented including dimensions, appearance, types of sediments involved and structure of the crater. An interpretation of these factors is given. A general discussion is included with emphasis on meteoritic craters as distinct from craters resulting from other causes.