Legacy product - no abstract available

What is Karst? Karst landscapes are shaped when surface or ground water becomes weakly acidic and reacts chemically with atmosphere or soil carbon dioxide. The dissolving actions of water on limestone bedrock result in a distinctive landscape defined by depressions such as sinkholes, caves, holes and solution pipes.

Flyer to be carried by GA officers while undertaking a building survey of the Perth Central Business District.

This interactive training module is an introduction to the theory, application and interpretation of gamma-ray spectrometry for regolith science. It uses descriptions, diagrams and three dimensional models to describe gamma-ray spectrometry for regolith science. The tutorial was created by Geoscience Australia and the Cooperative Research Centre for Landscape Environments and Mineral Exploration.

Turned off due to lack of metadata, custodian and product un-locatable

These guidelines set out arrangements to ensure a uniform and consistent approach to administration of the Offshore Petroleum and Greenhouse Gas Storage Act 2006 and the Petroleum (Submerged Lands) (Data Management) Regulations 2004, and the equivalent legislation in the States/NT. The Guidelines will assist industry in managing data submission requirements and for feedback. They will be modified as required in accordance with prevailing petroleum legislation and supporting regulations, and also with technology. Titleholders are encouraged to submit data in the manner described in the document. In the event of disagreement between these guidelines and current legislation or directions, the latter will prevail. For further information regarding these guidelines please contact: Eddie Resiak, Geoscience Australia, 02 6249 9289, eddie.resiak@ga.gov.au For feedback on these guidelines please contact: Andrew Barrett, Geoscience Australia, 02 6249 9440, andrew.barrett@ga.gov.au

Colour brochure about tsunami awareness and what to do in case of a tsunami threat. This pamphlet is produced jointly by Emergency Management Australia, Geoscience Australia and the Bureau of Meteorology.

A Mid Jurassic (late Callovian) suite of marine microplankton is present in the Elang Formation and its equivalents in the Timor Sea, offshore north-western Australia. It includes two genera, Voodooia and Woodinia and eleven species of dinoflagellate cysts which are described as new. The dinoflagellate cyst species are Ctenidodinium ancorum, Ctenidodinium fuscibasilarum, Ctenidodinium planocristatum, Durotrigia magna, Fusiformacysta terniana, Lithodinia protothymosa, Meiourogonyaulax penitabulata, Meiourogonyaulax viriosa, Voodooia tabulata, Woodinia pedis and Yalkalpodinium elangiana. A new acritarch species, Nummus apiculus, is also described. The dinoflagellate cyst genus Fusiformacysta is emended to stress the 3P nature of the archaeopyle and the presence of at least one, small anterior intercalary paraplate. The genera Lithodinia and Meiourogonyaulax are both maintained here, as the opercula are compound and simple respectively. Tabulodinium and its single species, T. senarium, are emended, in order to fully describe this intriguing species, the ornamentation of which is apparently destroyed by oxidation. The genus Yalkalpodium is emended to accommodate the new form Y. elangiana. All these new microplankton taxa have stratigraphical utility in the Wanaea digitata and Rigaudella aemula (interval) zones.

Knowledge of the nature of buildings within CBD areas is fundamental to a broad range of decision making processes, including planning, emergency management and the mitigation of the impact of natural hazards. To support these activities, Geoscience Australia has developed a building information system called the National Exposure Information System (NEXIS) which provides information on buildings across Australia. Most of the building level information in NEXIS is statistically derived, but efforts are being made to include more detailed information on the nature of individual buildings, particularly in CBD areas. This is being achieved in Sydney through field survey work.

Gravity surveys are used to measure small changes in the Earth's gravity field. These changes are due to density variations in the Earth's crust and can be used for a range of investigations such as studies of deep tectonic structures or finding caves in urban engineering studies. The physical property being measured, density variation, is the same in these investigations; it is just the survey parameters and precision required that differ. This manual serves to give a brief outline of the theory behind gravity surveying and discusses the considerations that need to be addressed when conducting gravity surveys. Gravity survey design and field techniques are discussed including both gravity and positioning equipment. Survey reduction and processing techniques are also discussed. This manual is not a definitive text on gravity surveying but rather a guide to techniques that have proved to be successful. As such, it is hoped it will be updated as techniques and instrumentation improve. Feedback or suggestions are welcome.