This report describes the results of a micropalaeontological examination of three rock samples from the Poole Range area.

A deposit of heavy minerals on a beach near Cape Everard was reported by Mr. H. Smith of Noorinbee, and it was examined by Dr. D.E. Thomas, Chief geologist, Victorian Mines Department, and the writer on 5th and 6th January, 1949. The beach sand deposits were examined, and samples were taken for analysis. The results of these investigations, and subsequent conclusions, are described in this report.

On 29th September, 1948, the writer, assisted by K.R. Fleischman, spent one day examining the rocks of the Cotter River Valley in the neighbourhood of the dam and mapping geological features which would have a bearing on the proposed extensions. Representative rocks were collected from the quarries on the right bank of the River below the dam. The mapping was done by chain, compass and Abney level. Aspects of general geology and engineering geology are discussed in this report. Two accompanying geological plans are included.

A geological field party was engaged in this area from 9th May to 30th September, 1948. This report provides an account of the field operations undertaken throughout this period and describes personnel involvement.

The Nerrima dome is situated in an area of gentle folding 90 miles south-east of Derby in the Kimberley Division of Western Australia. The topography is essentially flat with local ridges formed over the more resistant sandstone beds of the Liveringa Formation. Outcropping formations are Permian and include the lower part of the Liveringa and the top part of the Noonkanbah Formations. The Liveringa Formation consists mainly of sandstones and grits and forms ridges which practically surround the structure; the Noonkanbah is mainly clays and limestones which have been reduced to flat plains with low outcrops of limestone and calcareous sandstone. Vertical closure of the structure is about 250 feet over an area of 30 square miles. The cores of Nerrima No. 1 Bore have been examined and at the present depth of 4271 feet the bore appears to be still in Permian rocks although no reliable interpretation of the subsurface geology at Nerrima can be made without further detailed information from areas to the north.

Note on plan No. G.26-2, which shows the results of Equipotential Line surveys conducted on the Comstock Area, during the years 1937 and 1938. It is supplementary to Plan No. G.26-1 which shows the results of similar surveys on the southern part of the Mt. Lyell area. Plan No. G.26-2 should be studied together with this plan and the accompanying report dated 13th May, 1948.

At present a gravimetric survey of the area between Berrigan, Mulwala, and Corowa is being made by the geophysical section of this Bureau to show the southern continuation of the sedimentary basin between Oaklands and Berrigan which contains Permian coal. Reconnaissance mapping of the area was carried out on the 4th and 5th of July to find where the bedrock consisting of granite and pre-Permian sediments outcrops, in order to facilitate the interpretation of the gravimetric survey data. The accompanying plan showing outcrops in the Oaklands - Coorabin coalfield area is included.

This report describes the results of a micropalaeontological examination of rock samples from the Lesi and Oiapu structures, Papua.

Black sand on beaches in Knocker Bay, near Black Point, and at Record Bay, Port Essington, has been noticed from time to time by Captain F.E. Wells, who mentioned these occurrences to the writer. Opportunity was taken during a recent visit to the locality to secure a sample from the beach at Record Point. The presence of black sand on a narrow beach between Black and Reef Points was confirmed by observations from the ship through binoculars. The locality, general geology of the area, and the occurrence of black sand at Record Point are described in this report. The results of the laboratory examination of the sample are recorded.

This report outlines the geophysical survey work completed in the Peak, Coronation, and Mopone areas, in the period to September, 1949. The results and findings of this work are described in the report.