The London Bridge Limestone has been traced along its strike from a point five miles south-south-east of Queanbeyan to a point three miles south-east of Bredbo, a distance of forty miles. At London Bridge this formation attains its greatest development and a large-scale geological map of this area has been prepared. Fossil collections have been made from localities along this formation and the fauna has been examined. A description of the coral Pycnostylus ? sp. nov. is given. The stratigraphical position of this formation has been placed within the Wenlock Epoch, possibly within the Lower Wenlock.

The features of the single-point resistance log, obtained in A.A.O. No. 2 Bore, Roma, are described. Single-point resistance, self-potential and geological logs of the lower section of the boreholes are shown. The results indicate that electrical logging can be effectively used for correlation problems and that salt water sands in the reservoir rocks can be detected with reasonable certainty.

This report is concerned with the bryozoan faunas of the Nura Nura limestone and the Noonkanbah series. The bryozoan faunas from individual localities and the distribution of species occurring in areas other than the Kimberley district are listed. Other aspects of the faunas are discussed. This discussion includes a general consideration of the facies, a description of the faunas of the Nura Nura Limestone, and a comparison with other Permian faunas. A supplementary list of the bryozoan faunas of localities in the Noonkanbah series represented by the Teichert's specimens is included.

Part of 4th March, as well as 5th March, were spent at Carcoar, New South Wales, in inspecting the radioactive deposits in that locality and in observing the use of a helicopter, loaned by the R.A.A.F., as a means of prospecting for radioactive minerals. The writer was accompanied by R.S. Matheson of the Geological Section of the Bureau, and J. Daly and a party of geophysicists were also present at Carcoar at the time of this inspection. The present note is supplementary to the report by R.S. Matheson (1952/65) which includes plans of the Carcoar area and the radioactive deposits, and should be read in conjunction with that report.

An area of approximately 32 square miles in the vicinity of Rye Park has been mapped in greater detail than that of previous regional surveys. Three possible tungsten-bearing areas have been delineated as warranting magnetometric and plane-table surveys. An extension of each of these three areas is indicated. Attention is drawn to copper, tin, silver, lead, and zinc mineralisation of the area, and it is considered that there are possibilities of finding payable orebodies containing these metals.

Investigations into the geological structure of the immediate area of the mine are not complete. Various structural controls have been recognised in the Main Lode. The South Lode is mostly hidden under alluvium, but similar structures trend across the area. The possibility of a repetition copper lode in the South Lode area is hopeful. [The characteristics of the lodes and their ore reserves are discussed].

This report deals with the results of 22,355 ft. of scout boring over an area of approximately 50 square miles on the western flank of the Muswellbrook (N.S.W.) Anticline. A traverse of overlapping bore-holes, located between the outcrops of the Upper Marine Series (Mulbring Beds) in the east and of the Triassic sediments in the west; provided a more complete section of the Upper Coal Measures in this area than has been previously available. Some 46 coal seams were encountered and tentatively numbered for correlation. Some of the coal seams exhibit very good qualities, but none could be classed as a good gas or coking coal. Igneous intrusions are numerous and of a fairly wide vertical and areal extent; their influence on the associated coal seams is generally destructive. The results of the above boring may be regarded as a basis, for any detailed future underground and/or open-cut mining investigations. No attempt was made to estimate coal reserves of any kind.

Sediments of the Brock's Creek Group and of the Phillips Creek Formation, and volcanics of the Edith River Formation were prospected with carborne radiometric equipment. A comparatively high background count was recorded in the Edith River Volcanics, but no significant radiometric anomaly was found. A geological party prospected ten shear zones south east of the Edith Siding, including a cupriferous one, and a strongly fractured belt near the granite contact. No radiometric anomaly was found. Future prospecting should be directed towards major faults within the sediments.

This prospect was discovered by Geologist A.B. Clark on the 3rd September, 1953 at a point 11 miles distant and on a bearing of 33 degrees from the Katherine Post Office. Following its discovery a reservation was taken out on behalf of the Bureau of Mineral Resources to protect the area. Detailed geological and geophysical investigations have since been undertaken in the area, and costeaning by hand labour and bulldozer has also been done. The examination and testing of the prospect is not yet complete but a summary of the information concerning the prospect available at 31st October 1953 is given below.

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