A geological examination of the Hog Farm and its vicinity in Gungahlin District was undertaken in response to a request from the Property and Survey Branch, Department of the Interior. The object of the survey was to determine the possibilities of obtaining underground water and to indicate any areas considered favourable. The location, topography, geology, and possibilities of obtaining supplies of underground water at Hog Farm are discussed in this report. A geological plan of the vicinity is included.

On 21st November, 1944, a visit was made to the above block at the request of the lessee (Mr. G.D.C. Tanner) who had asked for advice regarding water supply. The report following this visit recommended the testing of an alluvium-filled basin which occupies part of the southeastern quarter of the block. Subsequently Mr. Tanner sank a well at a site about 1,000 feet south of the point indicated as most favourable. For all practical purposes it may be considered that the well has proved that the alluvium is not capable of yielding a useful supply of water at the end of a dry period, and it became necessary to consider the possibility of obtaining water from the bedrock. The present report embodies results of a further examination with this end in view. The location, topography, geology, and possibility of underground water at Block 10 are discussed in this report. A geological sketch map of Block 10 is included.

The work described in this report forms part of the uranium investigation being conducted by the Commonwealth Government for the British Government. 94 samples from the Radium Hill workings, S.A., were submitted to the Mineral Resources Survey for determination of relative radioactivity, with a view to making estimates of their uranium content. After determinations were made a suite of these samples was selected and submitted for assay for uranium and thorium by the South Australian School of Mines. This report comprises a description of the equipment, procedure and calibration, along with a discussion of the specific problems associated with the ore, the random variations in count-rate, and the results of tests of the ore samples.

The geophysical surveys reviewed in this report were part of an investigation carried out by the Commonwealth Government on behalf of the British Government. Deposits of uranium minerals occurring at several places in the Northern Flinders Ranges of South Australia, and centred about Mount Painter, were subjected to detailed geological examination followed by surface and underground prospecting by means of costeans, shafts, drives, etc. The geophysical work undertaken with the object of assisting the geological examination by measuring the radioactivity of rocks in situ and of hand specimens and assisting the prospecting work by making estimates of uranium content of mine samples. The geophysical surveys consisted of two main parts, namely, field surveys to locate and delineate areas of high radioactivity, and laboratory work to make approximate determinations of uranium content of mine samples by measuring the radiation from them. It is proposed to describe briefly the fundamental nature of radioactivity with specific reference to such features as have a particular bearing on the problems encountered in the field and assay work. In addition, it will be necessary to deal briefly with the geology of the various areas covered by the field work in so far as it effects the geophysical problems.

Results of a micropalaeontological examination of samples from a depth of 50 feet down to 1000 feet.

Note that this record includes Record 1945/014 by the same author. The Arcadia bore is situated in the parish of Arcadia, county of Westgrove, 85 miles north of Roma and 40 miles north-north-east of Injune. Drilling operations extended from 1936 to 1939 and were carried out by Drillers Limited. The bore was drilled in a large dome structure developed in Triassic and Permian sediments. The Arcadia bore is the second deep bore in Queensland from which a comprehensive series of samples has been examined for their microfaunal content. This examination was carried out on 1,256 samples consisting of drill cuttings taken over every five feet and of cores taken at numerous depths below 4,112 feet. The findings from the examination of these samples are described in this report.

The first discovery of bauxite in South Gippsland which was brought to public notice is said to .have been made in 1918 by Mr. Donald Clarke on the property known as Nahoo , allotment 8, Parish of Narracan South. Bauxite from this deposit has been used for chemical purposes for over twenty years. It is understood that other occurrences had been noted prior to Mr Clarke's report. Eleven additional discoveries were made from time to time up to April, 1942, when the extensive prospecting programme mentioned in the foreword was undertaken. In the short time that has elapsed since then a further twelve deposits have .been discovered, making a total of 24 deposits in the adjoining parishes of Moe, Allambee East, Narracan South, Mirboo and Budgeree in the county of Buln Buln. Several of these deposits have been systematically tested by shaft sinking and boring. The deposits at Boolarra, Oallignee and Nahoo have been reported on very briefly by Whitelaw (1921), Ferguson (1936) and Baragwanath (1940), but there have been no detailed descriptions of the deposits and no general account of their geological relationships. It should be noted that there has been no authenticated report of the occurrence of bauxite in Victoria outside South Gippsland and that little is known of the deposits other than those in the Boolarra-Mirboo North area.

Weilmoringle No. 9 Bore is situated about 60 miles northeast of Langbien's Bore. The results from a micro-examination of samples taken from 1650 feet down to 1742 feet are given in the report.

This report describes magnetic investigations made at East Arm, for the purpose of determining whether a certain area would be suitable as a site for an aircraft compass swinging base. A similar survey was made on an adjoining area in December, 1944 (Report No. 1945/1) where magnetic conditions were found to be satisfactory but for other reasons the general design was altered and the site of the proposed swinging base was moved from that area. On 9th June, 1945, a request for investigation of the new site was submitted. The instruments used and the methods employed were similar to those used in the December survey and the report on that survey should be consulted for details of the same. The results of the survey are discussed here. Two accompanying plans are included.

Core samples from No.2 Bore, Government House Grounds, Perth, were submitted for microscopic examination to determine if a micro-fauna existed in the sediments. Micro-fossils have been found and the assemblage is considered to be of Upper Eocene age. In the bore under consideration, core samples received for examination were from the depths of 47 feet 6 inches, 45 to 55, 66, and 102 feet. A detailed description of the core samples is given in the report.