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  • single page item on stratigraphy issues relevant to Australian geologists. This column discusses international discussions on the global stratotype section and point (GSSP) concept, new developments in stratigrphic classification and upcoming opportunities to showcase Australian examples in 2012. Journal ISSN 0312 4711

  • Short article about stratigraphy matters. ISSC, new ASUD State search tool, Timescale, comparisions with British geological practices. ISSN: 0312 4711

  • The University of Geosciences in Wuhan is developing the computer systems to help the provincial surveys re-map the geology of China at 1:250 000 and 50 000 scales in just 12 years. With a land area 25% larger than Australia's, China has about 15 000 1:50 000 map sheets! The maps are really just by-products, though, as the ultimate goal is to build a computer database of the geology and mineral resources of the whole of China. LIU Songfa and I went to Wuhan in late 1999 to talk to Professor WU and his colleagues about techniques of field-data acquisition and geoscience database design.

  • Many of the methods commonly used to calculate gravity anomalies have been around since the beginning of gravity surveying when calculations were done by hand and local horizontal and vertical datums were used. These days computing power is not a concern and most surveys are carried out using GPS technology with global datums. Geoscience Australia is reviewing the methods used to calculate gravity anomalies in the Australian National Gravity Database and is proposing changes such as the use of the GRS80 reference ellipsoid for calculating normal gravity and also as the height datum for anomaly calculations.

  • The Australian Fundamental Gravity Network defines the datum, Isogal84, for gravity surveys conducted in Australia and the surrounding oceans. It consists of over 900 gravity stations at over 250 locations. Geoscience Australia has conducted measurements with a portable absolute gravity meter at a number of these stations in order to improve the accuracy of this network and to provide a consistent framework for gravity surveyors. These absolute gravity measurements show that Isogal84 is 75 microgals (1 microgal = 1x10-8 m/s2) higher than the absolute datum and that the accuracy of the stations within the network is approximately 30 microgals.

  • The recording of continuous waveform data presents different challenges to the recording of event triggered segmented data or to the recording of semi-continuous yet offline data. Many formats in use today derive their origins from the earlier imperatives of such systems. This article will briefly classify such formats so as to better appreciate continuous format requirements. Following this a comparison will be made of continuous formats and the format adopted for use in the Australian National Seismic Network (ANSN). The CD 1 format in detail, its use and adaptation within the ANSN will come after this. Some contextual background on networking will be provided and this will then be wrapped up by a section on where the ANSN may go in the future with CD 1. An appendix is provided to explain data conversion on the GDAS system.

  • This report outlines the headings under which mineral statistics might be collected, and the information that is required from metal and mineral producers. Attached are lists of metals and mineral products under the appropriate classes.

  • The national mineral deposits dataset covers 60 commodities and more than 1050 of Australia's most significant mineral deposits - current and historic mines and undeveloped deposits. This release adds more than 100 new deposits to the previous release of OZMIN plus upgraded resource and production figures.

  • This handbook was first released as BMR Record 1991/29 (Pain et al. 1991). One of the objectives of CRC LEME has been to produce a glossary and classification of regolith terminology, and a second edition of this handbook. The glossary of regolith terminology has already been released in draft form (Eggleton 2000), and this is the second edition of the mapping handbook. We have updated the attribute lists and other details to take account of changes to the RTMAP database structure. We have also changed some definitions to be consistent with the glossary. Otherwise, very little change has been made to the text. The archival RTMAP database resides in the AGSO Corporate Database, in the Oracle Database Management System (see Hazell et al, 1995 for details). Some details, including authority tables, can also be found on the AGSO World Wide Web site, at http://www.agso.gov.au, under Services. There is currently work under way to enable users to enter data from remote locations via the World Wide Web. This facility will be advertised on both the CRC LEME and AGSO web pages when it is available.