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A few pieces of worked bone were previously reported from Sibudu, a site from KwaZulu-Natal in South Africa featuring a stratigraphic sequence with pre-Still Bay, Still Bay, Howiesons Poort, post-Howiesons Poort, late and final MSA cultural horizons. Here we describe an expanded collection of worked bones, including twenty-three pieces. Technological and use-wear analysis of these objects, and their comparison with experimental and ethnographic data, reveals that a number of specialised bone tool types (wedges, pièces esquillées, pressure flakers, smoothers, sequentially notched pieces), previously known only from the Upper Palaeolithic and more recent periods, were manufactured and used at least 30,000 years earlier at Sibudu Cave. These tools appear to be part of a local tradition because they are absent at contemporaneous or more recent southern African sites. Variability in Middle Stone Age material culture supports a scenario in which, beyond broad similarities in lithic technology, significant differences between regions, and trends of continuity at a local scale emerge in other aspects of the technical system, and in the symbolic domain. The archaeological record is revealing a complexity that prevents evaluation of the modern character of Middle Stone Age cultures in antinomic terms. We argue here that it is the detailed analysis of cultural variation that will inform us of the non-linear processes at work during this period, and contribute in the long run to explaining how and when crucial cultural innovations became established in human history. 相似文献
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Still Bay and serrated points from Umhlatuzana Rock Shelter,Kwazulu-Natal,South Africa 总被引:1,自引:0,他引:1
Marlize Lombard Lyn Wadley Zenobia Jacobs Moleboheng Mohapi Richard G. Roberts 《Journal of archaeological science》2010
Umhlatuzana Rock Shelter is a long-sequence Middle and Later Stone Age site in KwaZulu-Natal, South Africa. Jonathan Kaplan excavated the site and analysed the material in the 1980s as a rescue project. For many years thereafter the collection remained untouched, partly because of doubts raised about the stratigraphic integrity of the site. Using single-grain OSL dating we show that post-depositional mixing of sediment was restricted to time-specific, small-scale events. The OSL ages obtained for the Howiesons Poort and pre-Howiesons Poort are comparable to those of other southern African sites with unambiguous Howiesons Poort and Still Bay Industries. Based on morphological and other characteristics, we reason that the Still Bay is represented at Umhlatuzana, and announce the presence of a serrated point assemblage closely associated in time with the Still Bay points. 相似文献
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Management of Historic Shipwrecks Through a Combination of Significance and Conservation Assessments
《Conservation and Management of Archaeological Sites》2013,15(3):245-267
AbstractCorrosion modelling of decay rates of the iron wrecks in Port Phillip Bay, Victoria, has enabled an estimation of the speed at which the historic resource of iron shipwrecks is disappearing. Use of the significance ranking of the iron wrecks, based on the Australian National Standards for significance assessment, provides a useful guide to decision-making, but decisions based solely on these criteria can lead to less than optimal results. From the corrosion rates and the amount of residual metal thickness in structural elements it is possible to determine a conservation ranking that is based on the need for intervention and the chances of being successful in stabilizing the wrecks. The arithmetic product of the significance and conservation rankings defines the treatment score or ranking which forms the basis for rational decision making about deployment of resources. 相似文献
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三亚亚龙湾和北海银滩是我国海滨度假区发展的典型案例。在大量田野调查和对关键信息提供者深度访谈基础上,从度假区地方政府介入程度及方式、土地管理、招商引资、开发水平和绩效等方面进行了比较研究。研究发现,亚龙湾度假区是企业主导下市场化发展模式,而银滩度假区则是地方政府主导发展模式。以后者为代表的过度行政化治理结构是我国现阶段海滨度假区发展的制度特征。新时期海滨度假区需要探索政府和市场分工明确、责权清晰、优势互补、科学合理的治理结构,使得度假区在市场机制的引导下良性健康稳步发展。 相似文献
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There is little research on children’s experiences of growing up in a popular tourist destination, where place and space are contested with visitors, migrants and temporary residents. Existing literature on young people’s experiences of their socio-spatial surroundings has focused predominantly on the rural/urban dichotomy, often neglecting to explore how identity and belonging are negotiated in complex community contexts such as tourist destinations. This paper reports on recent research that suggests that young people’s experiences of growing up in such an environment are nuanced and diverse, with their rich narratives disrupting socially constructed distinctions between the rural and the urban, merging experiences from both worlds. 相似文献
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Samuel P. Hanes 《Journal of Cultural Geography》2013,30(3):308-327
Conflicts over oysters intensified along the US mid-Atlantic coast as traditional management of these valuable resources broke down in the late nineteenth century. In response, states founded management agencies, and mapping oysters was one of their first activities. Virginia and Maryland's first cartographers favored privatizing common property, an alteration that would have displaced thousands of oystermen and benefited wealthier segments of the industry. Cartographers sought to use maps to expand privatization; however, Chesapeake Bay oystermen were numerous enough to wield political influence, and they rejected one of the first major surveys and shaped the production of the other two, using them to protect their common property while making these rights visible to the State. Many conservation practices in the eastern USA grew out of local people's traditions, and this study explores the role of the mapping process amid the broader context of a shift in the scale of management to state agencies. 相似文献
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WAL AMBROSE FIONA PETCHEY PAMELA SWADLING HARRY BERAN ELIZABETH BONSHEK KATHERINE SZABO SIMON BICKLER GLENN SUMMERHAYES 《Archaeology in Oceania》2012,47(3):113-132
In the early 1900s thirteen engraved Conus shell valuables were dug from prehistoric midden mounds in Oro Province. Since the early 1970s nineteen undated surface finds have been found in the northern Massim of Milne Bay Province. When three artifacts became available for AMS radiocarbon dating, provided they were restored after sampling to their original visual appearance, a specialist team was assembled and this paper reports its findings regarding the thirty‐two shells. The paper covers sampling and conservation, dating (including new information on the local oceanic reservoir effect), distribution, art, depositional and cultural histories. These distinctive Conus shell valuables are part of the material culture found along the northern coast of the eastern tip of New Guinea and on the islands of the northern Massim during the Expansion Phase c.1000–500 BP. Their decoration is comparable to that produced by Milne Bay Province woodcarvers in historic times. This continuity makes them the oldest radiocarbon dated artifacts decorated in the Massim art style. 相似文献
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We present the first direct assessment of marine reservoir effects in the Moreton Bay region using radiocarbon dating of known‐age, pre‐AD 1950, shell samples from the east coast of Stradbroke Island and archaeological shell/charcoal pairs from Peel Island in Moreton Bay. The resulting ΔR value of 9±19 14C years for the open ocean conforms to regional values established for northeast Australia of 12±10 14C years. Negative ΔR values of −65±61 14C years and −216±94 14C years for southern Moreton Bay highlight the potential for larger offsets over the last ∼900 years. These may be linked to changing terrestrial inputs and local circulation patterns. 相似文献
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The simulation of Sea-ice in a coarse resolution ocean general circulation model is examined in Hudson Bay and surrounding waters. Sea-ice distribution and duration compared well to climatological values, although ice thickness is undersimulated as it is in other modelling work. In Hudson Bay ice thickness variation was dominated by the atmospheric forcing as shown by the symmetric response of ice thickness to warming and cooling scenarios. Below ice heat fluxes play a more significant role in Foxe Basin and Baffin Bay where they mitigate air-ice heat loss by as much as 40 percent, thus limiting ice thickness and duration. Below ice heat flux reduces by 23 percent for the region of study (Hudson Bay, Foxe Basin, Baffin Bay, and Labrador Sea) for a global 3°C cooling and increases by 9 percent for a 3°C global warming. This asymmetric response is attributed to the ocean's asymmetric response to warming and cooling scenarios. In so much as Hudson Bay is dominated by atmospheric forcing rather than under ice heat as these results indicate, coarse resolution models may be useful in assessing the impact of change. However the necessary reconfiguration of the model grid render results from Foxe Basin and Hudson Strait less credible. On étudie la simulation de glace marine dans un modèle de circulation océanique générale à faible résolution dans la baie d'Hudson et dans les eaux avoisinantes. La distribution et la durée de la glace marine correspondent bien aux valeurs climatologiques, bien que l'épaisseur de la glace soit sous-simulée comme c'est le cas dans d'autres travaux de modélisation. Dans la baie d'Hudson, la variation de l'epaisseur de la glace est dominée par le forçage atmosphérique, comme on peut le voir d'après la réponse symétrique de l'épaisseur de la glace suivant les scénarios de réchauffement et de refroidissement. Les flux de chaleur sous la glace jouent un rôle plus important dans le bassin de Foxe et la baie Baffin, où ils permettent une réduction des pertes de chaleur air-glace allant jusqu'à 40 pour cent, limitant ainsi l'épaisseur de la glace et la durée. Le flux de chaleur sous la glace diminue de 23 pour cent dans la région étudiée (baie d'Hudson, bassin de Foxe, baie Baffin et mer du Labrador) pour un refroidissement global de 3C et augmente de 9 pour cent pour un réchauffement global de 3C. On attribue cette réponse asymétrique à la réponse asymétrique de l'océan aux scénarios de refroidissement et de réchauffement. Dans la mesure où, comme l'indiquent ces résultats, la baie d'Hudson est dominée par le forçage atmosphérique plutôt que par la chaleur sous la glace, des modèles à faible résolution peuvent être utiles pour évaluer l'impact des changements. Cependant, la reconfiguration nécessaire de la grille du modèle atténue la crédibilité des résultats obtenus dans le Bassin de Foxe et le détroit d'Hudson. 相似文献