The period 7th to 28th January, 1951 was spent at Selwyn by the writer: approximately one week was spent in preparing a semi-regional map at a scale of 1 inch to 400 feet; one week was given to mapping a smaller area at a scale of 1 inch to 40 feet. Level plans have been constructed showing what are considered to be the broad outlines of ore arrangement and structure and a number of sections have been constructed. Nineteen plans and sections illustrate this report. Twelve typical ore and rock specimens were studied in thin section and the information obtained has been incorporated in this report. An account of the regional geology of the prospect and the geology of the ore deposits is given in this report.

Dr. M.F. Glaessner published his paper in Volume 88, No. 4, 1951 of this Journal in which he describes foraminiferal zones in the Tertiary of Australia and in which he summarises known and unpublished information on the Australian Tertiary sequence. A great deal of precise stratigraphic work has been done on the Australian Tertiary rocks in the past five years. Glaessner knew of this and it is regretted that he did not wait until the results of this work were available. Recent discoveries made since Glaessner's paper was prepared, have made necessary a drastic revision of the age correlations of the Victorian Stages and have emphasised the undesirability of prematurely publishing material based on investigations which are still in progress. A discussion of this paper follows herein.

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Legacy product - no abstract available

Legacy product - no abstract available

The following abstract was written in order to facilitate the compilation of the Queensland four-mile geological sheets and the explanatory notes accompanying them. The area described covers the Springsure, Emerald, Jericho and partly the Tambo and Baralaba four-mile sheets.

The results of the present investigation continue northward the information already gathered in the Australian Capital Territory by Dr. A.A. Opik of the Bureau of Mineral Resources. The work was carried out to fill in a gap in geological information, which existed in this area, to enable completion of the Lake George one-mile geological map.

In December, 1950, the Pakistan Government filed a formal application to Australia, through the Technical Assistance to South-East Asia Co-operation Scheme, for three geologists to carry out geophysical surveys in Pakistan. In May 1951, the geologists, J.F. Ivanac and D.M. Traves of the Bureau of Mineral Resources and D. King of the South Australian Mines Department, arrived in Pakistan. Their instructions were to carry out a geological survey of a portion of the Gilgit Agency, and to discuss with the Director of the Pakistan Geological Survey or any other Government Officer familiar with the problem, the alluvial gold deposits of Chitral River and the lignite deposits of West Bengal and Sind. Field investigations commenced from Gilgit in June 1951, and the party spent four months in the region. This report gives an account of the visit and the results of the investigation.

The fossils were collected by D.M. Traves, a member of a party of three Australian Geologists who visited Pakistan in 1951. Collections were made at the following localities: Darband Village, Sandhi Village, and Khaibar Village. A preliminary examination and report on the fossils has been made by Dr. M.H. Khan, Geologist of the Geological Survey of Pakistan. This report contains a description of these fossils and provides a comparison of the faunas found at these localities.

In the various methods of geophysical prospecting, sensitive instruments are used on or near the surface of the earth to measure effects which arise from differences between the physical properties of rocks, ores and minerals. The analysis and interpretation of these measurements permit conclusions to be drawn concerning the sub-surface geology and the presence or absence of orebodies, coal seams, and the like, or of structures likely to be favourable to the occurrence of oil, etc. The principal physical properties of rocks which are useful in geophysical prospecting are density, elasticity, electrical conductivity, radio-conductivity and magnetic susceptibility. Aeromagnetic survey methods, their present use, and results of such surveys, are discussed in this report.