Open Quaternary最新文献_第4页

A Multi-Proxy Reconstruction of Environmental Change in the Vicinity of the North Bay Outlet of Pro-Glacial Lake Algonquin 前冰湖阿尔冈昆湖北湾出口附近环境变化的多指标重建

Open Quaternary Pub Date : 2019-11-15 DOI: 10.5334/oq.54

R. Rabett, A. Pryor, David J. Simpson, L. Farr, S. Pyne‐O'Donnell, M. Blaauw, S. Crowhurst, R. Mulligan, Christopher O. Hunt, R. Stevens, M. Fiacconi, D. Beresford-Jones, P. F. Karrow

{"title":"A Multi-Proxy Reconstruction of Environmental Change in the Vicinity of the North Bay Outlet of Pro-Glacial Lake Algonquin","authors":"R. Rabett, A. Pryor, David J. Simpson, L. Farr, S. Pyne‐O'Donnell, M. Blaauw, S. Crowhurst, R. Mulligan, Christopher O. Hunt, R. Stevens, M. Fiacconi, D. Beresford-Jones, P. F. Karrow","doi":"10.5334/oq.54","DOIUrl":"https://doi.org/10.5334/oq.54","url":null,"abstract":"We present a multi-proxy study of environmental conditions during and after the recessional phases of pro-glacial Lake Algonquin in the vicinity of the North Bay outlet, Great Lakes Basin. Data presented comes from a new sedimentary profile obtained from the Balsam Creek kettle lake c. 34 km north-east of the city of North Bay. This site lies close to the north-east margin of the maximum extent of the post-Algonquin lake sequence, which drained through the Ottawa-Mattawa valley system. Our data are presented against a Bayesian age-depth model, supporting and extending regional understanding of vegetation succession in this part of north-east Ontario. The core profile provides a minimum age for the formation of the glacial outwash delta in which the kettle is set, as well as tentative timing for the Payette (post-Algonquin) lake phase. We highlight two discrete intervals during the Early Holocene, with modelled mean ages of: 8475–8040 cal. BP (332–316 cm) and 7645 cal. BP (286 cm), when climatic aridity affected the growth of vegetation within the kettle vicinity. Association with volcanic activity is posited. Cryptotephra dating to 7660–7430 cal. BP (mean age: 7580 cal. BP) is chronologically and geochemically assigned to the Mazama climactic eruption, while an earlier ash accumulation 8710–7865 cal. BP is tentatively sourced to an unknown eruption also in the Cascades region of Oregon. Outside of these periods, the Balsam Creek sequence shows considerable habitat stability and a character akin to that seen at more southerly latitudes. On this evidence we propose that access to reliable resources within kettle features could have aided the initial colonisation of northern Ontario’s environmentally dynamic early post-glacial landscape.","PeriodicalId":37172,"journal":{"name":"Open Quaternary","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48049905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Stable Isotope Studies of North American Arctic Populations: A Review 北美北极种群稳定同位素研究综述

Open Quaternary Pub Date : 2019-11-11 DOI: 10.5334/oq.67

Alison J. T. Harris, D. Elliott

引用次数: 0

Working from the Known to the Unknown: Linking the Subaerial Archaeology and the Submerged Landscapes of Santarosae Island, Alta California, USA 从已知到未知的工作:连接水下考古和圣塔罗萨岛的水下景观，上加利福尼亚，美国

Open Quaternary Pub Date : 2019-10-22 DOI: 10.5334/oq.66

T. Braje, J. Maloney, Amy E. Gusick, J. Erlandson, Alexander J. Nyers, L. Davis, K. Gill, Leslie A. Reeder-Myers, D. Ball

引用次数: 15

Annual Growth Patterns and Interspecimen Variability in Mg/Ca Records of Archaeological Ostrea edulis (European Oyster) from the Late Mesolithic Site of Conors Island Conors岛晚中石器时代遗址欧洲牡蛎(Ostrea edulis)的年生长模式和Mg/Ca记录的种间变异

Open Quaternary Pub Date : 2019-09-30 DOI: 10.5334/oq.59

N. Hausmann, Harry K. Robson, C. Hunt

{"title":"Annual Growth Patterns and Interspecimen Variability in Mg/Ca Records of Archaeological Ostrea edulis (European Oyster) from the Late Mesolithic Site of Conors Island","authors":"N. Hausmann, Harry K. Robson, C. Hunt","doi":"10.5334/oq.59","DOIUrl":"https://doi.org/10.5334/oq.59","url":null,"abstract":"Annual growth patterns in marine mollusc shells are valuable indicators of the condition of marine ecology through time. In archaeological contexts, the mollusc’s time of death (i.e. the last season of growth) is an indicator of human exploitation patterns throughout the year, enabling the reconstruction of when and how often gathering occurred as well as when sites were occupied. Both pieces of information, growth rate and season of death, are vital for understanding exploitation pressure(s) in the past, and building baselines for modern environmental policies that secure sustainable marine resources. Previously, these parameters have been determined by incremental growth-line or isotopic analyses, which are time consuming and often expensive techniques, thus restricting sample size and the overall robustness of palaeoecological interpretations. Here, we apply Laser Induced Breakdown Spectroscopy (LIBS) to produce elemental maps (Mg/Ca) with the potential to trace and display growth patterns quickly, and at a reduced cost. We further compare the elemental maps with the results obtained from incremental growth-line analysis to provide a structural context for the geochemical data, and demonstrate the utility of an integrated methodological approach. Our pilot study was undertaken on 12 European oysters (Ostrea edulis, Linnaeus, 1758) from the Late Mesolithic shell midden at Conors Island, Co. Sligo in the Republic of Ireland. Our LIBS analysis enabled us to accurately and quickly determine repeating growth patterns, which were often in agreement with the annual growth increments visible through the microscopic analysis. Based on this comparative dataset, including structural and geochemical patterns, the Late Mesolithic site of Conors Island had been occupied throughout the year. Moreover, our analyses highlight the applicability of LIBS to determine prehistoric seasonality practices as well as biological age and growth at an improved rate and reduced cost than was previously achievable.","PeriodicalId":37172,"journal":{"name":"Open Quaternary","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45180292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Geoarchaeological Evidence for the Decline of the Medieval City of Qalhat, Oman 阿曼卡勒哈特中世纪城衰落的地质考古证据

Open Quaternary Pub Date : 2019-09-27 DOI: 10.5334/oq.56

A. Ermertz, M. Kázmér, Silja Kerstin Adolphs, M. Falkenroth, G. Hoffmann

引用次数: 10

Sowing the Seeds of Future Research: Data Sharing, Citation and Reuse in Archaeobotany 播下未来研究的种子:考古植物学中的数据共享、引用和再利用

Open Quaternary Pub Date : 2019-07-15 DOI: 10.5334/OQ.62

L. Lodwick

引用次数: 14

First Fossils of Hyenas (Chasmaporthetes, Hyaenidae, Carnivora) from North of the Arctic Circle 来自北极圈北部的第一批鬣狗化石(裂口目，鬣狗科，食肉目)

Open Quaternary Pub Date : 2019-06-18 DOI: 10.5334/OQ.64

Z. J. Tseng, G. Zazula, L. Werdelin

引用次数: 2

Birds in Medieval Norway 中世纪挪威的鸟类

Open Quaternary Pub Date : 2019-06-17 DOI: 10.5334/OQ.58

Samuel J. Walker, A. Hufthammer, H. Meijer

{"title":"Birds in Medieval Norway","authors":"Samuel J. Walker, A. Hufthammer, H. Meijer","doi":"10.5334/OQ.58","DOIUrl":"https://doi.org/10.5334/OQ.58","url":null,"abstract":"Whilst modern avian distributions in Scandinavia are well studied, how past events and processes have shaped modern bird communities in the region remains poorly known. This is mainly due to the fact that work on post-glacial avian assemblages has been done mostly from an archaeological perspective, and on a site-specific basis. Therefore, in order to understand the history of bird species in Scandinavia, there is a clear need to collate data on the past occurrences and abundance of birds within the region. Here we present data on the presence of bird species within 21 Norwegian Medieval (1030–1537 CE) assemblages. Despite climatic fluctuations and the rise of urban centres, our re-examination and compilation of bird bone assemblages from Medieval Norway found no evidence to suggest that the Medieval bird fauna differed from the modern one. The most common birds in Medieval assemblages are Galliformes. In urban sites these are mostly domestic fowl, whereas on rural sites wild species are dominant. Our data indicates an introduction of domestic fowl in the early Medieval period and a slightly delayed introduction of domestic geese, with both species becoming more abundant during the mid to late Medieval period. This appears to be later than other Scandinavian countries. Interestingly, species that are now ubiquitous in urban areas, such as pigeons, corvids and gulls are mostly absent from Medieval urban centres. In addition, we found a bias towards the use of female Accipiter gentilis in falconry, while Falco species may have been exported. This is the first time that data on past avian occurrences for any period are reviewed and collated for Norway. In addition, our work highlights the importance of birds and bird exploitation in Medieval Norway.","PeriodicalId":37172,"journal":{"name":"Open Quaternary","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47190438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

The Significance of Air Circulation and Hearth Location at Paleolithic Cave Sites 旧石器时代洞穴遗址空气循环和壁炉位置的意义

Open Quaternary Pub Date : 2019-06-12 DOI: 10.5334/OQ.52

Yafit Kedar, R. Barkai

引用次数: 11

Post-Glacial Radiocarbon Ages for the Southern Cordilleran Ice Sheet 南科迪勒冰盖的冰期后放射性碳时代

Open Quaternary Pub Date : 2019-05-13 DOI: 10.5334/OQ.55

J. Gombiner

{"title":"Post-Glacial Radiocarbon Ages for the Southern Cordilleran Ice Sheet","authors":"J. Gombiner","doi":"10.5334/OQ.55","DOIUrl":"https://doi.org/10.5334/OQ.55","url":null,"abstract":"The Pleistocene Cordilleran Ice Sheet (CIS) formed over mountainous terrain in northwestern North America, and last reached a maximum extent around 15 to 17 ka BP. Following this maximum, the ice sheet began to diminish in size. Retreat was rapid in some sectors, but was punctuated by still-stands and readvances in other sectors. Geochronology of CIS retreat is key for understanding the pace and style of this deglaciation, and for testing hypothesized feedbacks between the changing ice sheet and the ocean, atmosphere, and solid earth. One method of reconstructing ice sheet retreat relies on radiocarbon ages of immediate post-glacial organic material. Such ages are minima for deglaciation and are often utilized to infer the timing of ice sheet retreat. This paper describes a database of post-glacial radiocarbon dates on non-marine carbon for the region from 47° to 52°N that was once covered by the southern CIS. The data were collected from published literature. Each entry includes name, lab ID, location, elevation, the material dated, its stratigraphic context, the event dated, additional details, and a reference to the original data. This information is useful for validating numerical models of the CIS, for connecting CIS evolution to climate change, and for reconstructing late Pleistocene environments of the Pacific Northwest.","PeriodicalId":37172,"journal":{"name":"Open Quaternary","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41751223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1