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<p>The Australian Stratigraphic Units Database (ASUD) is the national authority on stratigraphic names in Australia. It originated as the National Register of Stratigraphic Names in 1949. The register was originally set up to help geoscientists adhere to the then newly created Australian Code of Stratigraphic Nomenclature (Lenz, et al, 1996). All information was held in a card file system until 1979 when the database was first developed electronically. The database now records information on all Australian stratigraphic units and their usage in published literature. <p>The database contains about 17500 currently approved stratigraphic names and over 36000 variations, most of which are superseded, obsolete, or misspelt versions of the current names. This information is based on over 16000 published references. <p>The database is maintained by Geoscience Australia on behalf of the Australian Stratigraphy Commission, a standing committee of the Geological Society of Australia. <p>Procedures can be queried at: http://www.ga.gov.au/data-pubs/datastandards/stratigraphic-units? <p>Data can be queried and downloaded at the ASUD website at: https://asud.ga.gov.au/ <p>Email contact: mailto:stratnames@ga.gov.au

This report is a summarised account of an investigation into the heavy mineral content of three bores, put down by the Roma Blocks Oil Company. The positions of the bores and a short account of the geology of the area are given, together with results of the work to date, and an evaluation of the prospects of correlation by petrological means.

An examination of a small area flanking the Molonglo River at Acton was undertaken at the request of the Department of Works and Housing. The construction of the weir across the river within the area examined to raise the water level to 1825' is proposed, and the geological investigation was carried out in connection with this proposed work. Aspects of general geology and engineering geology are discussed. A geological plan and sketch sections are included.

The presence of bauxite in the Territory was first reported in 1908. This supposed bauxite occurrence at Mounts Roe and Bedwell at the head of Port Essington was examined and sampled by the writer in June, 1949 with negative results. Subsequent to the visit to Port Essington, many specimens of lateritic material from the northern portion of the Territory have been received. Some were collected from inland localities and others from various points on the Arnhem Land coast and adjacent islands. These samples were submitted for visual examination and preliminary testing. The results of these tests, together with the interpretations and conclusions that have been drawn with regard to the search for bauxite, are summarised in this report.

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.

Geophysical surveys were conducted by the Bureau at Mt. Lyell during the period March-July, 1948. Geophysical surveys were made on the Gormanston and adjacent areas. Methods of survey used comprised Equipotential Line, Self-Potential and Gravity. Concurrently with these operations the results of the 1934-38 geophysical surveys were examined. Field operations were resumed in January, 1949. The principal purpose of this Progress Report is to briefly describe the survey results obtained in 1948 and to state recommendations for testing.

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.

An inspection of radioactive minerals was conducted in the Marble Bar area. The localities of Wodgina, Mount Francisco, Pilgangoora, Alisa Downs, Trig Hill and Cooglegong were visited. Occurrences of monazite, yttrotantalite, pilbarite and radio-active columbite were investigated and samples collected for further examination. An account of the inspection and subsequent findings is given in this report.

In the recent past, geologists have been inclined to confine their study to the structural traps and openings which localize individual ore shoots and have tended to neglect most other features, including considerations of ore genesis. L.C. Graton has recently remarked that "the out-standing unfilled need lying ahead is the discovery of new mineralized districts". In this connection he speaks of "the all-important standpoint of genetic understanding". As a contribution towards filling this need, the following points, relating to mineralization in the Cobar-Nymagee province, are here presented for consideration.