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  • 25% coverage east & west corners F54/B1-73 Contour interval: 10

  • The R502 series of maps has been replaced by the National Topographic Map Series (NTMS). The R502 series consists of 542 map sheets and covers Australia at a scale of 1:250,000. It was compiled from aerial photography, but only about one quarter of the series was contoured. The standard sheet size is 1 degree of latitude by 1.5 degrees of longitude. Transverse Mercator map projection and Clark 1858 datum were used. Coverage of the country was completed in 1968.

  • Legacy product - no abstract available

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  • The Bureau of Mineral Resources seismic party carried out a seismic survey in the Bonaparte Gulf area of north-western Australia between 16th June and 13th October, 1956. The initial objects of the survey were to obtain regional information on the thickness of the sedimentary rocks and on the tectonics of the Bonaparte Gulf Basin, and to establish the applicability of the seismic method in the area. During the course of the survey the party was directed to transfer its attentions to obtaining some detailed information on the Spirit Hill Anticline. This latter work was carried out in response to an application by Westralian Oil Pty. Ltd., which was anxious to select sites for a test boring programme. The seismic results indicate a maximum thickness of sediments of about 20,000 feet in the Carlton Basin and 14,000 feet in the Burt Range Basin. The rocks in both these basins have been folded to a considerable extent and the reflections suggest unconformities within both basins. The seismic reflection method proved successful in indicating geological structure at depth in most of the areas tested.

  • A new genus, Praeundulomya, has been erected to embrace forms from the Lower Permian rocks of Western Australia. The type species, P. concentrica, is described. Species of the new genus are known from the Lyons Group, the Coyrie Formation, and the Bulgadoo Shale, in the Carnarvon Basin. Praeundulomya is related to Allorisma-like forms such as Edmondia sulcata (Phillips), and is probably ancestral to Undulomya Fletcher.

  • These documents have been scanned by the GA Library. Please refer to the document for contents.