Five core samples from the Ravensworth Bore were received for examination. These cores consisted of hard, dark grey, partly carbonaceous shale and the only fossils that could be examined were on the fractured surface of the samples. A detailed examination is given below.

Samples submitted from this bore were taken from the depth of 25 feet down to 475 feet. This report comprises a synopsis of the lithology of the samples after washing, together with notes on the samples.

This report is supplementary to a report on the Kuridala Copper Field, Cloncurry district, Queensland, by C.J. Sullivan and R.S. Matheson (1950) and should be read in conjunction with that report. Sullivan and Matheson showed that, in the known deposits, ore occurs in the Hampden Fault, where slates in the hanging-wall of the fault are thrust against the resistant amphibolites occurring in the footwall (western side) of the fault. The rocks to the west of the fault were known, from mapping carried out by Broadhurst (1936), to be folded into a synclinal structure and it was postulated by Sullivan and Matheson that further ore may be found where the fault intersected amphibolites occurring stratigraphically below the amphibolites near which the known ore occurs (Sullivan, and Matheson 1950, Plate 1, Regional Cross Section). It was realised by Sullivan and Matheson that the prediction of a position of the amphibolites, at depth, involved considerable uncertainty and it was thought that further mapping of the Western Syncline might enable a reasonably accurate interpretation of the position of the amphibolites to be made. The [present] field work was carried out between 20th August and 18th September, 1951, by K.W.B. Iten and R.A. Searl of the Bureau of Mineral Resources and J.H. Brooks of the Geological Survey of Queensland. The general postulations by previous investigators concerning the relationship of geological structure to ore occurrence were checked but no detailed investigation was made of the size, shape and grade of known ore-bodies; the present investigators consider that the interpretation by Sullivan and Matheson (1950) of the structural controls of ore deposition may be correct.

An examination was made of many of the mines in the Harts Range and Plenty River mica fields during the latter portion of 1951, in the company of Messrs. G.F. Joklik and W. Roberts. The work involved mine surveying and mapping. A great deal of information of a general nature was obtained from Mr. Joklik, who has spent much time studying the regional geology of the area and the mica deposits. The observations here recorded in regard to mining are the writer's responsibility. The geology of the deposits, mining, and exploration, are discussed.

A total of 16 rotary cored bores were sunk by the Bureau in Portions 14, 15, 16 and 17, Parish of Wallarah, Northumberland County, 5 miles south of Swansea. Approximately 1,100 ft. of "Test and Define" drilling proved a possible maximum of 960,000 tons of coal, or a minimum of 750,000 tons in the Wallarah Seam under an average overburden coal ratio 5:1. The overburden is mainly conglomerate. The geology of the area and mining are discussed in this report. The results of drilling are detailed in the accompanying plates, stratigraphic logs, and descriptive bore logs of the Swansea South area.

The Australian Antarctic Expedition 1911-14 established four absolute magnetic stations, namely Stations A, B, C and D. Two subsequent stations, Stations E and F, came into operation in 1950 and 1952 respectively. Because absolute magnetic observations had been made at different stations is was essential that the differences in the magnetic elements between the various stations be determined so that all data could be reduced to a common point. The observations were carried out during the period 31st March to 6th April 1952, whilst the Australian National Antarctic Research Expeditions relief operations were in progress.

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A total of thirteen rotary cored bores were sunk by the Bureau approximately one mile south of the village of Teralba in the Parishes of Teralba and Awaba, Northumberland County. The Great Northern Seam in places is sufficiently thick for open cut mining but the coal is generally of very poor quality and the overburden to coal ratio much too high to warrant further drilling. Continued prospecting of the Fassifern Seam in this area is not warranted, because of the very poor quality of the coal in this seam. This report contains an account of the operations, and describes the results of the geological investigations. The results of drilling are detailed in the accompanying plates and bore logs.

Samples from three bores in the Great Artesian Basin in Northern New South Wales were submitted by the Water Conservation and Irrigation Commission of New South Wales for micropalaeontological examination. These bores are: Bore No. 8256, M.E. Howe, "Retreat", Dubbo, Bore No. 8259, L. Fitzell, "Marathon", Dubbo, [and] Bore No. 8264, E.W. Robinson, "Womparley", Bourke. The results of the detailed examination of the samples are given below.

Samples from four bores in the Great Artesian Basin of New South Wales were submitted for micropalaeontological examination, by the Water Conservation and Irrigation Commission of New South Wales. These bores are Bore No. 8213, "Trenton" Coonamble, No. 8262, "Montrose", Dubbo, No. 8268, "Fair Oak", Dubbo, and No. 8272, Wanaaring, Bourke. The results of the detailed examination of these bores are given below.