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81.
Guangxu Wang Ian G. Percival Rongyu Li 《Alcheringa: An Australasian Journal of Paleontology》2013,37(3):388-393
Wang, G., Percival, I.G. & Li, R., 25.2.2015. Remarks on the pattern of septal insertion in rugose corals. Alcheringa 39, xxx–xxx. ISSN 0311-5518Well-preserved specimens of the Hirnantian (latest Ordovician) rugose coral Lambeophyllum? corniculum He from the Yangtze Platform of South China, clearly show how catasepta (minor septa) are inserted, confirming the model proposed by Weyer in the 1970s. Our observations indicate the insertion of counter lateral septa and their neighbouring catasepta on the counter side takes place in exactly the same manner as that of the subsequent metasepta and catasepta. We propose abandoning the use of the term counter lateral septa. Therefore, exclusion of the pair of counter lateral septa reduces the number of protosepta from six to four.Guangxu Wang [gxwang@nigpas. ac. cn], State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences (CAS), 39 East Beijing Road, Nanjing 210008, PR China; Ian G. Percival [ian. percival@trade. nsw. gov. au], Geological Survey of New South Wales, 947–953 Londonderry Road, Londonderry, NSW 2753, Australia; Rongyu Li [lir@brandonu. ca], Department of Geology, Brandon University, Manitoba R7A 6A9, Canada. 相似文献
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Ian D. MacLeod 《International Journal of Nautical Archaeology》2013,42(2):382-391
Analysis of the pre‐disturbance values of the in situ corrosion parameters on historic iron shipwrecks and artefacts has established that the arithmetic product of the pH and corrosion potential is dependent on the burial environment and provides a unique insight into the objects' state of decay. The value of the product changes during in situ conservation treatment with sacrificial anodes, and reaches a minimum at which point the treatment is completed. Treatment times vary with water‐depth, being faster on shallower sites and shorter for more extensively corroded artefacts. The model was developed using data from the Duart Point wreck (1653), the Monitor‐styled warship HMVS Cerberus (1926) and a series of wrecks in Australia and the USA. 相似文献
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Vicki Richards Ian MacLeod Peter Veth 《Conservation and Management of Archaeological Sites》2013,15(1-3):240-253
Increasingly, archaeologists are opting for on-site examination, reinterment, and in situ preservation of underwater cultural heritage sites as the first option in the management of sites at risk, as opposed to the more traditional excavation, recovery, conservation, and display/storage methods. This decision will inevitably be based on significance assessment, degree of perceived risk, and resourcing issues. However, long-term monitoring must become an integral part of these management programmes in order to quantitatively evaluate the effectiveness of the in situ preservation techniques employed. In 2012 the Australian Historic Shipwreck Preservation Project (AHSPP) was awarded a large Australian Research Council (ARC) Linkage Grant, enabling ten partner organizations and three Australian universities to collaborate in one of the largest multi-organizational maritime archaeology projects to be undertaken in Australia to date. One of the major aims of the project is to develop a protocol for the excavation, detailed recording and reburial of significant shipwrecks under threat, fostering a strategic national approach for the management of underwater cultural heritage (UCH) sites at risk. Two historically significant shipwreck sites that are considered under threat were chosen for this longitudinal comparative study — the Clarence (1850) located in Port Phillip Bay, Victoria; and the James Matthews (1841) which lies in Cockburn Sound, Western Australia. Both sites have been preserved in situ using two very different but innovative remediation strategies. More importantly, long-term monitoring programmes have been implemented on both sites, which will characterize changes in the reburial environment and the effect on the reinterred materials. In this way, the efficacy of both in situ preservation techniques will be systematically tested, providing a comparative analysis of practical protocols for the long-term protection and management of underwater cultural heritage. 相似文献
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Like many other advanced industrial democracies, Australia has experienced major and ongoing economic reform over the last two decades, the pace of which has, if anything, increased since the election of the Liberal‐National government in 1996. These developments have led to a growing sense of economic insecurity among many voters. Many of these concerns were focused on the 1998 election, when the Liberal‐National Coalition advocated the introduction of a goods and services tax. This paper uses the 1998 Australian Election Study (AES) survey to examine the impact of economic evaluations, economic insecurity and economic issues on voting in the election. The results demonstrate the existence of widespread economic concerns across the electorate, but that the Coalition gained a marginal electoral advantage on the tax reform issue. Economic issues were also a cause of defection to the new One Nation Party, although further analysis reveals that its support was motivated more by race and ethnic concerns than by economic discontent. 相似文献
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Radiocarbon dates are presented for distinctive types of British Late Neolithic pottery, identifying questions which cannot yet be resolved. 相似文献
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