1949
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Legacy product - no abstract available
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Legacy product - no abstract available
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This report describes the results of a micropalaeontological examination of rock samples from Pidinga.
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This report describes the results of a micropalaeontological examination of rock samples from the Giralia Area. The stratigraphic and faunal features of the collection are discussed.
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This report describes the results of a micro-examination of five rock samples from the vicinity of the Rocket Range.
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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.
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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.
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The survey of Dampier Land was undertaken to investigate the extent of the Mesozoic deposits, which were previously known to exist from the information obtained from deep water bores at Broome and near Derby, and as surface outcrops at Point Torment, north of Derby. A series of reconnaissance traverses was made in an effort to visit all known rock exposures. The town of Broome was used as a base for the reconnaissance. Areas, including Mount Clarkson, Mount Jowlaenga, Cape Leveque and the Sunday Islands were visited during the investigation. This report comprises detailed descriptions of the topography, general geology, micropalaeontology, structural geology, geological history, and petroleum prospects of the areas investigated.
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The Provisional Administration of the Territories of Papua and New Guineas is investigating the possibility of manufacturing portland cement in the vicinity of Moresby and the question of supply of raw materials in that area has been referred to the Bureau of Mineral Resources. No field investigations into the supply and distribution of these materials has yet been undertaken, and these preliminary notes have been compiled from geological data and observations made available from previous geological reports. The raw materials from which portland cement is produced are limestone clay or shale and a small quantity of iron oxide. The availability and suitability of rock materials for cement manufacture in the Port Moresby area are discussed at length in this report. The general geology of the area and the availability of other materials required for the manufacturing process are briefly described.
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This report describes the findings of a micropalaeontological examination of a small collection of limestones from Cape Range, Rough Range and Learmonth Aerodrome, Northwestern Australia. The collection is characteristic of the Tertiary deposits of the North West Basin. The majority of the limestones belong to the "f" stage (Middle Miocene) of the Netherlands East Indies "letter" classification but the shelly limestone from Rough Range, in the absence of zonal Miocene foraminifera is regarded as Lower Pliocene. A detailed palaeontological description of these samples is given in this report.