A small collection of rock samples containing Gondwana type fossil plants from three localities near Collinsville is discussed in this report. All assemblages - although with some conspicuous differences - show the characteristic Permian Glossopteris Flora. On the determination of the representatives of this flora alone, however, it cannot be said to which particular horizon within the Permian Bowen Series the samples from Collinsville belong. Modern statistical methods are suggested.

Three samples of limestone were collected during a geological survey of the Rigo area. One sample is of Upper Cretaceous age and the others of Lower Middle Miocene age. The samples were submitted for micropalaeontological examination. The results of this examination are described here.

The material described in this report was collected and forwarded for examination by Mr. M.R. Banks of the Geology Department, University of Tasmania. The report comprises notes on the lithology, fossil content, state of preservation, and correlation, of the samples.

This report is comprised of nine separate sub-reports, referred to as records nos. 1951/3a to 1951/3i. Micropalaeontological examinations were conducted on samples from various localities in the region of Mt. Gambier, South Australia. The results of these examinations, together with any accompanying notes, are recorded in the respective reports.

A provisional Isogonic Map of Australia and New Guinea for the epoch 1950.5 has been prepared by revising the observational material used in the Isogonic Map for 1942.5, and including observations made at various parts of Australia since 1942. The extensions of the Isogonic Lines beyond the coast line of Australia depend almost entirely on extrapolation from the earlier work.

At the request of the Government Geologist of Western Australia some gravity observations were made near Bullsbrook, a small township on the Perth-Geraldton road, 27 miles from Perth. It was thought that the gravity observations would help resolve a problem connected with the water supply of the township on which the advice of the Geological Survey of Western Australian had been sought. Because the gravity method had proved successful elsewhere in determining the thickness of sediments overlying dense basement rocks, it was though that some estimate of the thickness of sediments underlying Bullsbrook could be made by using the method. This report gives an account of the operations and their results.

The Treasure Mine, Hatches Creek, is believed to have been discovered in 1914 and has been one of the most consistent producers of wolfram to the present time. This report gives an account of the economic geology of the mine. The ore type, reefs and workings, ore localization, and ore reserves are described.

This report is a detailed stratigraphical and structural study of an area of some 40 square miles south-east of Cobar together with a geological reconnaissance of an area of 500 square miles in the Cobar-Canbelego district. The purpose of these investigations was the elucidation of the general geology and the problem of ore localisation in the Cobar-Nymagee-Canbelego metalliferous province.

The presence of native sulphur on the slopes of Mt. Suretamatai, Vanua Lava Island, Banks Group has been known since 1887 or earlier, and many claims, most of them extravagant, have been made regarding the potential value of the deposits. More recently manganese has been reported on the island of Maewo, and there have been unsubstantiated rumours of the presences of nickel, chromite, copper, cobalt, gold and coal, as well as sulphur on islands other than Vanua Lava. With the examination of the sulphur and manganese deposits as the principal object, the writer visited the New Hebrides from 7th July to 14th August 1951, and took the opportunity of following up the rumoured occurrences of economic minerals as far as circumstances permitted. This report gives an account of the visit and its findings.

This preliminary statement sets out briefly the results of a drilling campaign conducted by the Bureau in accordance with an agreement between the Mines Department of N.S.W., the Joint Coal Board and the Bureau. The area drilled totals about 120 acres in the Parish of Kahibah, Co. Northumberland, west of the town of Cardiff. The purpose of drilling was to test the westerly extension of the Australasian "seam" beyond the colliery workings and to define the potential open-cut site.