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  • This report describes the results of a micro-examination of five rock samples from the vicinity of the Rocket Range.

  • This note describes a sample of beach sand. The specimens of foraminifera found in the sample are listed.

  • Black coal of Permian age has been found near Oaklands and Coorabin in the Riverina District, New South Wales. The coal is low-grade compared with the bituminous coals of Permian age at Newcastle, but has significance due to its situation in the south-western part of New South Wales, near the Murrumbidgee and Murray irrigation areas, and not far from the Victorian border. This report has been compiled mainly from field observations and from the files of the Bureau. The report gives a broad overview of the situation of the field and aspects of geology. The discovery, development, and workings of the coalfield are described. The characteristics of the coalfield are discussed, including petrography, the quality of the coal, the presence of water, and the extent of the field. Extensive data on the shafts and bores are appended. Accompanying geological plans are included.

  • The scientific search for ore in Australia is still in an early stage of development, because, until recently, a sufficient supply of metals was available from concentrations readily detectable by ordinary prospecting methods. Now the whole mineral supply position is changing and the rate of discovery of new deposits by prospectors in the present century had been quite discouraging. The Australian Government and the Australian mineral industry have recognised the need for mineral exploration both to supply home requirements and to assist in overcoming world shortages. An overview of the situation is presented in this report, which outlines the problem and the corrective reforms and activities undertaken by the state and federal governments, and mining companies, to promote mineral exploration. A summary is given of the exploration and ore-finding work undertaken by mining companies and government agencies between 1930 and 1949.

  • The Lesi structure, situated near the coast of the Gulf of Papua, about 100 miles north-west of Port Moresby, was surveyed by plane table. A full account of this survey work is set down in this report. The general characteristics, physiography, and regional geology of the area are described. A detailed account of the geology of the Lesi structure is given, including descriptions of the lithology, palaeontology, stratigraphy, and geological structure. The structure's relation to adjoining structures and the possibility of oil accumulation are discussed. An extract from a micropalaeontological report, geological plans, and photographs of the area are appended.

  • The "Trough" area extends parallel to and 200 to 300 feet west of the eastern beach from approximately 4800 feet north of the zero-line shown on the locality plan, to 6000 feet south of the zero line. A previous report (Record 1948/067) has given an estimate of the quantities of heavy mineral occurring from 2100 feet north to 1100 feet north. The following report deals with the remaining areas. The area was sampled during 8th and 9th September, 1948. Where the heavy minerals were at or close to the surface, samples were obtained from shovel holes. Where the mineral was at some depth below the surface, the samples were obtained from bores put down with a post-hole digger. Estimates of the quantities and grades of heavy mineral concentrates, the quantities of overburden, and the quantities of each of the heavy minerals are tabulated in this report. The data sets from which these estimates are derived are appended.

  • 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 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.

  • 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.