Studia Quaternaria最新文献

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Last two millennia water level changes of the Młynek Lake (northern Poland) inferred from diatoms and chrysophyte cysts record 波兰北部Młynek湖近两千年的水位变化,由硅藻和绿藻囊记录推断
IF 0.6
Studia Quaternaria Pub Date : 2018-01-01 DOI: 10.2478/SQUA-2018-0006
A. Zalat, F. Welc, J. Nitychoruk, L. Marks, M. Chodyka, Łukasz Zbucki
{"title":"Last two millennia water level changes of the Młynek Lake (northern Poland) inferred from diatoms and chrysophyte cysts record","authors":"A. Zalat, F. Welc, J. Nitychoruk, L. Marks, M. Chodyka, Łukasz Zbucki","doi":"10.2478/SQUA-2018-0006","DOIUrl":"https://doi.org/10.2478/SQUA-2018-0006","url":null,"abstract":"A sediment core, 350 cm long recovered from Młynek Lake, northern of Poland (Warmia and Masuria Region) was analyzed with respect to their content of diatoms and chrysophyte cysts. The aim was to reconstruct the lake water level and climatic changes during the past 2500 years. The recognized diatom assemblages displayed marked floristic changes along the sediment core samples. The main change in diatom composition consists of a shift from an assemblage dominated by benthic Fragilaria sensu lato species through marked intervals to a planktonic one in distinct zones. A high proportion of benthic to plankton taxa has been reported as indicative for a lowering of the lake level with long ice cover in a cold dry climate and a shift from benthic to planktonic diatom taxa reflects arising water level with longest growing season and reduced ice cover on the lake during a warm wet climate. Multivariate statistical analysis included hierarchical ascending clustering distinguished four diatom ecological groups. The analyzed core section was divided into 11 diatom zones according to a distribution of ecological groups and variation in abundance of dominant species supported by 14C data. The results displayed a developmental history of the Młynek Lake that can be divided into 6 main phases of alternating warm wet and cold dry shifts. A distinct dominance of planktonic eutrophic indicator diatoms accompanied by a low abundance of chrysophyte cysts indicates increased lake trophicity and a general trend for the increasing anthropogenic impact.","PeriodicalId":42625,"journal":{"name":"Studia Quaternaria","volume":"22 1","pages":"77-89"},"PeriodicalIF":0.6,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68920922","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: 12
Geological and Geomorphologic Conditions and Traces of Prehistoric and Historic Human Settlements in the Vicinity of Ulów (Roztocze Region, Southeastern Poland) Ulów(波兰东南部Roztocze地区)附近史前和历史人类住区的地质地貌条件和痕迹
IF 0.6
Studia Quaternaria Pub Date : 2017-12-01 DOI: 10.1515/squa-2017-0007
J. Rodzik, Barbara Niezabitowska-Wiśniewska, J. Nitychoruk, J. Budziszewski, M. Jakubczak
{"title":"Geological and Geomorphologic Conditions and Traces of Prehistoric and Historic Human Settlements in the Vicinity of Ulów (Roztocze Region, Southeastern Poland)","authors":"J. Rodzik, Barbara Niezabitowska-Wiśniewska, J. Nitychoruk, J. Budziszewski, M. Jakubczak","doi":"10.1515/squa-2017-0007","DOIUrl":"https://doi.org/10.1515/squa-2017-0007","url":null,"abstract":"Abstract The paper presents determinants of location of the multicultural complex of archaeological sites in the vicinity of Ulów, in the Central Roztocze upland region in south-eastern Poland. Archaeological research revealed that in the area assumed to be devoid of settlements, the settlements of prehistoric and historical communities functioned from the Palaeolithic to modern times. The region was also subjected to environmental examination. Location of sites was analysed, taking into account a convenience of communication in a regional scale and local environmental conditions. Analysis of hydrogeological, geomorphological and soil conditions was carried out, taking into account water supply, communication and the farming development. In-depth analysis included micromorphological DTM (Digital Terrain Model) and geological and soil probing. The area was found to be located on the crossing of prehistoric communication routes the course of which depended on the variability of the physiographic parameters of regions. The functioning of new cultures in the same place resulted from specific local conditions such as: easily arable soils, favourable microclimate, and particularly access to water. The presence of a source of water in a plateau area is determined tectonically (strike-slip fault), lithologically (impermeable marl horizon), and geomorphologically (dissection of the aquifer by an erosion-denudation valley).","PeriodicalId":42625,"journal":{"name":"Studia Quaternaria","volume":"34 1","pages":"83 - 97"},"PeriodicalIF":0.6,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49339176","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: 2
Preliminary Back-Analysis of the Height of Mud Brick Fortifications Based on Geoarchaeological Data at Tell El-Retaba Site in Egypt 基于埃及Tell El Retaba遗址考古资料的泥砖防御工事高度的初步反分析
IF 0.6
Studia Quaternaria Pub Date : 2017-12-01 DOI: 10.1515/squa-2017-0008
J. Trzciński, M. Zaremba, S. Rzepka, W. Bogusz, T. Godlewski, Tom Szczepanski
{"title":"Preliminary Back-Analysis of the Height of Mud Brick Fortifications Based on Geoarchaeological Data at Tell El-Retaba Site in Egypt","authors":"J. Trzciński, M. Zaremba, S. Rzepka, W. Bogusz, T. Godlewski, Tom Szczepanski","doi":"10.1515/squa-2017-0008","DOIUrl":"https://doi.org/10.1515/squa-2017-0008","url":null,"abstract":"Abstract The Tell el-Retaba archaeological site is located at Wadi Tumilat, a shallow valley running from the Nile Delta to the Bitter Lakes. In ancient times, a route connecting Egypt with Syria-Palestine ran across the site. In the 13th century BC, during the rule of Ramesses II, a fortress surrounded by “Wall 1” was erected and in times of Ramesses III in the 12th century BC, a larger fortress surrounded by “Wall 2” and “Wall 3” was constructed. Using the finite element method (FEM) and ZSoil 2D&3D software, the wall heights were modelled and their soil-structure interaction was analysed. Strength of the wall depended on size and strength of bricks and mortar, brickwork, wall shape and foundation. Ancient builders using mud bricks must have known from practical experience the essentials of a wall construction, in which the height to width ratio was at 1.75 to 1.85. Moreover, they must have related the engineering properties of the material with the height of the construction and its purpose. The width to height ratio must have been used and related by ancient Egyptians to the ground resistance. Modelling has shown that, at wall width of 5 m, the foundation would have lost its stability at wall height of 13–14 m and bricks from the lower part of the wall would be destroyed. According to the undertaken assumptions, in order to retain stability, the wall height must have been limited to about 8–9 m.","PeriodicalId":42625,"journal":{"name":"Studia Quaternaria","volume":"34 1","pages":"108 - 99"},"PeriodicalIF":0.6,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46155653","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
Holocene Lake Sediments as a Source of Building Material in Ancient Egypt; Archeometric Evidence from Wadi Tumilat (Nile Delta) 古埃及全新世湖泊沉积物作为建筑材料的来源尼罗河三角洲图米拉特河的考古证据
IF 0.6
Studia Quaternaria Pub Date : 2017-12-01 DOI: 10.1515/squa-2017-0009
M. Zaremba, J. Trzciński, F. Welc
{"title":"Holocene Lake Sediments as a Source of Building Material in Ancient Egypt; Archeometric Evidence from Wadi Tumilat (Nile Delta)","authors":"M. Zaremba, J. Trzciński, F. Welc","doi":"10.1515/squa-2017-0009","DOIUrl":"https://doi.org/10.1515/squa-2017-0009","url":null,"abstract":"Abstract The Tell el-Retaba archaeological site is located in the middle part of Wadi Tumilat, which extends along the north-eastern margin of the Nile Delta. It contains fragments of fortified and domestic objects of the ancient fortress and other constructions built of mud bricks. The establishment and functioning of the fortress is dated at the times of the reign of two great pharaohs, Ramesses II and Ramesses III (13th and 12th centuries BC). The grain size composition of the sediments used for mud brick production had significant influence on their physical and mechanical properties, which was used by the ancient Egyptians for the improvement of bricks. The finest fractions, clay and silt, which generally comprise clay minerals and organic matter played a significant role. These components significantly influenced the mud brick properties and resulted in a structural cohesion of the material. The second important component of mud bricks were coarse fractions – sand and gravel. The source of material used for brick production were the natural sediments located in the vicinity of the fortress, i.e. the Holocene lake clay and the Pleistocene gravel and sand of the gezira formation, deposited by a braided river. Clay sediments have a variable lithology as can be deduced from grain size composition of mud bricks and their properties. This variability was caused by a variable regime of the Nile, which supplied material to the lake basin. Geological studies were used to recognize ancient environment and morphology of the area, and to find clay, sand and gravel open-pits that existed in the area. The fortress site was selected optimally in relation to the landscape morphology and close vicinity of the source of basic material and water used for mud brick production. The area around the fortress was substantially transformed by humans due to settlement.","PeriodicalId":42625,"journal":{"name":"Studia Quaternaria","volume":"34 1","pages":"109 - 118"},"PeriodicalIF":0.6,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43714644","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: 0
The Last Hundred Years of Land Use History in the Southern Part of Valdai Hills (European Russia): Reconstruction by Pollen and Historical Data 瓦尔代山南部(欧洲-俄罗斯)土地利用史的最后一百年:花粉和历史资料的重建
IF 0.6
Studia Quaternaria Pub Date : 2017-12-01 DOI: 10.1515/squa-2017-0006
E. Novenko, Pavel Shilov, D. Khitrov, D. Kozlov
{"title":"The Last Hundred Years of Land Use History in the Southern Part of Valdai Hills (European Russia): Reconstruction by Pollen and Historical Data","authors":"E. Novenko, Pavel Shilov, D. Khitrov, D. Kozlov","doi":"10.1515/squa-2017-0006","DOIUrl":"https://doi.org/10.1515/squa-2017-0006","url":null,"abstract":"Abstract The last one hundred years of land use history in the southern part of Valdai Hills (European Russia) were reconstructed on the base of high resolution pollen data from the peat monolith taken from the Central Forest State Reserve supplementing with historical records derived from maps of the General Land Survey of the 18th and 19th centuries and satellite images. According to the created age model provided by dating using radio-nuclides 210Pb and 137Cs, pollen data of the peat monolith allow us to reconstruct vegetation dynamics during the last one hundred years with high time resolution. The obtained data showed that, despite the location of the studied peatland in the center of the forest area and rather far away from possible croplands and hayfields, the pollen values of plants – anthropogenic indicators (Secale sereale, Centaurea cyanus, Plantago, Rumex, etc.) and micro-charcoal concentration are relatively high in the period since the beginning of the 20th century to the 1970s, especially in the peat horizon formed in the 1950s. In the late 1970s – the early 1980s when the pollen values of cereals gradually diminished in assemblages, the quantity of pollen of other anthropogenic indicators were also significantly reduced, which reflects the overall processes of the agriculture decline in the forest zone of the former USSR.","PeriodicalId":42625,"journal":{"name":"Studia Quaternaria","volume":"34 1","pages":"73 - 81"},"PeriodicalIF":0.6,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46458301","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
Holocene Lake and Shallow Water Sediments at Mograt Island, Sudan 苏丹Mograt岛全新世湖泊和浅水沉积物
IF 0.6
Studia Quaternaria Pub Date : 2017-06-27 DOI: 10.1515/squa-2017-0001
Annett Dittrich, Sayantani Neogi
{"title":"Holocene Lake and Shallow Water Sediments at Mograt Island, Sudan","authors":"Annett Dittrich, Sayantani Neogi","doi":"10.1515/squa-2017-0001","DOIUrl":"https://doi.org/10.1515/squa-2017-0001","url":null,"abstract":"Abstract This paper presents the results of stratigraphic excavation and soil studies carried out at Mograt Island, the largest of the Nilotic islands in Sudan. Due to its restricted insular environments, Holocene alluvial deposits were observed to be interlocked with archaeological remains of different periods, allowing for a combined chronostratigraphic approach to study both cultural and climatic events. To better understand the environmental context through soil components and pedological features at a microscopic scale, soil block samples were accordingly collected and studied by the application of soil micromorphology. This approach provides insights into the history of Nile terrace aggradation through the suspension of Nile sediment loads under stillwater conditions as well as of the periodical establishment of shallow water pools at the islands′ plateaus by the surface run-off from local rains. Since these patterns vary significantly from the present situation, they offer a key to the scenario in which specific early agricultural and animal herding practices evolved.","PeriodicalId":42625,"journal":{"name":"Studia Quaternaria","volume":"34 1","pages":"21 - 9"},"PeriodicalIF":0.6,"publicationDate":"2017-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45670626","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: 0
Pleistocene Deposits in the Southern Egyptian Sahara: Lithostratigraphic Relationships of Sediments and Landscape Dynamics at Bir Tarfawi 南埃及撒哈拉更新世沉积物:Bir Tarfawi沉积物的岩石地层关系和景观动力学
IF 0.6
Studia Quaternaria Pub Date : 2017-06-27 DOI: 10.1515/squa-2017-0002
Christopher L. Hill, R. Schild
{"title":"Pleistocene Deposits in the Southern Egyptian Sahara: Lithostratigraphic Relationships of Sediments and Landscape Dynamics at Bir Tarfawi","authors":"Christopher L. Hill, R. Schild","doi":"10.1515/squa-2017-0002","DOIUrl":"https://doi.org/10.1515/squa-2017-0002","url":null,"abstract":"Abstract The sedimentological and lithostratigraphic record from north-central Bir Tarfawi documents the presence of Pleistocene basin-fill deposits. Three topographic basins were created as a result of deflation during climate episodes associated with lowering of the local groundwater table. In each case, the three deflational basins or topographic depressions were subsequently filled with sediments; these basin aggradations coincided with changes from arid climate conditions to wetter conditions and a rise in the groundwater table. The oldest and highest sedimentary remnant is associated with Acheulian artifacts and may reflect spring-fed pond and marsh conditions during a Middle Pleistocene wet climate episode. Lithofacies for a lower stratigraphic sequence (the “White Lake”) documents deposition in a perennial lake that varied in extent and depth and is associated with Middle Paleolithic artifacts. A third episode of deflation created a topographic low that has been filled with Late Pleistocene sediments that are associated with Middle Paleolithic artifacts and fossil remains. Lateral and vertical variations in the lithofacies of this basin-fill sequence and the sediments of the “grey-green” lake phases provide a record of changing hydrologic conditions. These hydrologic conditions appear to reflect variations in water-table levels related to groundwater recharge and, at times, local rains.","PeriodicalId":42625,"journal":{"name":"Studia Quaternaria","volume":"34 1","pages":"23 - 38"},"PeriodicalIF":0.6,"publicationDate":"2017-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/squa-2017-0002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67306773","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: 4
Diatom Stratigraphy of FA-1 Core, Qarun Lake, Records of Holocene Environmental and Climatic Change in Faiyum Oasis, Egypt Qarun湖FA-1岩心硅藻地层,埃及Faiyum绿洲全新世环境与气候变化记录
IF 0.6
Studia Quaternaria Pub Date : 2017-06-27 DOI: 10.1515/squa-017-0005
A. Zalat, L. Marks, F. Welc, A. Salem, J. Nitychoruk, Zhongyuan Chen, Aleksandra Majecka, M. Szymanek, M. Chodyka, Anna Tołoczko-Pasek, Qianli Sun, Xiaoshuang Zhao, Jun Jiang
{"title":"Diatom Stratigraphy of FA-1 Core, Qarun Lake, Records of Holocene Environmental and Climatic Change in Faiyum Oasis, Egypt","authors":"A. Zalat, L. Marks, F. Welc, A. Salem, J. Nitychoruk, Zhongyuan Chen, Aleksandra Majecka, M. Szymanek, M. Chodyka, Anna Tołoczko-Pasek, Qianli Sun, Xiaoshuang Zhao, Jun Jiang","doi":"10.1515/squa-017-0005","DOIUrl":"https://doi.org/10.1515/squa-017-0005","url":null,"abstract":"Abstract This study evaluates changes in the environmental and climatic conditions in the Faiyum Oasis during the Holocene based on diatom analyses of the sediment FA-1 core from the southern seashore of the Qarun Lake. The studied FA-1 core was 26 m long and covered the time span ca. 9.000 cal. yrs BP. Diatom taxa were abundant and moderately to well-preserved throughout the core sediments. Planktonic taxa were most abundant than the benthic and epiphytic forms, which were very rare and sparsely distributed. The most dominant planktonic genera were Aulacoseira and Stephanodiscus followed by frequently distribution of Cyclostephanos and Cyclotella species. The stratigraphic distribution patterns of the recorded diatoms through the Holocene sediments explained five ecological diatom groups. These groups represent distinctive environmental conditions, which were mainly related to climatic changes through the early and middle Holocene, in addition to anthropogenic activity during the late Holocene. Comparison of diatom assemblages in the studied sediment core suggests that considerable changes occurred in water level as well as salinity. There were several high stands of the freshwater lake level during humid, warmer-wet climatic phases marked by dominance of planktonic, oligohalobous and alkaliphilous diatoms alternated with lowering of the lake level and slight increases in salinity and alkalinity during warm arid conditions evident by prevalence of brackish water diatoms.","PeriodicalId":42625,"journal":{"name":"Studia Quaternaria","volume":"34 1","pages":"61 - 69"},"PeriodicalIF":0.6,"publicationDate":"2017-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45347386","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: 4
An Attempt to Integration of Different Geophysical Methods (Magnetic, GPR and ERT); A Case Study From the Late Roman Settlement On the Island of Rab in Croatia 尝试整合不同的地球物理方法(磁性、GPR和ERT);罗马晚期在克罗地亚拉布岛定居的个案研究
IF 0.6
Studia Quaternaria Pub Date : 2017-06-27 DOI: 10.1515/squa-2017-0004
F. Welc, R. Mieszkowski, Goranka Lipovac Vrkljan, Ana Konestra
{"title":"An Attempt to Integration of Different Geophysical Methods (Magnetic, GPR and ERT); A Case Study From the Late Roman Settlement On the Island of Rab in Croatia","authors":"F. Welc, R. Mieszkowski, Goranka Lipovac Vrkljan, Ana Konestra","doi":"10.1515/squa-2017-0004","DOIUrl":"https://doi.org/10.1515/squa-2017-0004","url":null,"abstract":"Abstract In 2016 within the RED Project Roman Economy in Dalmatia: production, distribution and demand in the light of pottery workshops, 5 selected areas around the Podšilo Bay were geophysically surveyed. During the fieldworks in the Lopar protected area, located in the northeastern part of the Island of Rab a gradiometer, ground-penetrating radar (GPR) and electrical resistivity tomography (ERT) were used. The main aim of the project was to document presence of the Roman architecture in two areas of the bay’s hinterland as suggested earlier by finds of pottery and glass. Geophysical studies conducted in the Lopar area revealed presence of underground remains of ancient structures, probably from the late Roman period and connected with a ceramic production centre at the present seashore. The most interesting results were obtained for the area no. 4, the site where magnetic, georadar and ERT surveys revealed an ancient regular building at 0.4-0.6 m depth. The survey performed in the Lopar area clearly indicates that integration of different geophysical methods enables detailed and effective identification of buried archaeological structures.","PeriodicalId":42625,"journal":{"name":"Studia Quaternaria","volume":"34 1","pages":"47 - 59"},"PeriodicalIF":0.6,"publicationDate":"2017-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/squa-2017-0004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49366414","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: 18
Molluscs and Ostracods of the Qarun Lake: Preliminary Report From FA-1 Core in Faiyum Oasis, Northern Egypt 喀润湖软体动物和介形类:埃及北部Faiyum绿洲FA-1岩心的初步报告
IF 0.6
Studia Quaternaria Pub Date : 2017-06-27 DOI: 10.1515/squa-2017-0003
M. Szymanek
{"title":"Molluscs and Ostracods of the Qarun Lake: Preliminary Report From FA-1 Core in Faiyum Oasis, Northern Egypt","authors":"M. Szymanek","doi":"10.1515/squa-2017-0003","DOIUrl":"https://doi.org/10.1515/squa-2017-0003","url":null,"abstract":"Abstract A research was conducted on the Holocene lake sediments from the full-cored FA-1 drilling at the southern shore of the Qarun Lake in the Faiyum Oasis in northern Egypt. Altogether 10 taxa of molluscs and 8 taxa of ostracods were identified in the examined deposits, with total amounts of 768 and 2872 individuals, respectively. The fauna was investigated with palaeoecological purpose and allowed for preliminary reconstruction of sedimentary environment in the lake. The occurrence of Valvata nilotica Jickeli, 1874 and Gomphocythere sp. in the lower part of the core and a low proportion of carapaces (2.4-28%) indicated freshwater and higher-energy conditions, respectively. Rapid expansion of Cyprideis torosa (Jones, 1850) at a depth of 18 m could point to very short saline episode in the lake. The increase in salinity and drop of water level were evidenced in the uppermost part of the core (4-3.5 m), when the lake was dominated by Hydrobia ventrosa (Montagu, 1803), Cerastoderma glaucum (Poiret, 1789) and C. torosa. The steady sedimentation in a shallow lake was also supported by considerable amount of complete ostracod carapaces (45%). The faunal assemblage and smooth valves of C. torosa suggested salinity of 14-25‰.","PeriodicalId":42625,"journal":{"name":"Studia Quaternaria","volume":"34 1","pages":"39 - 45"},"PeriodicalIF":0.6,"publicationDate":"2017-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41912320","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: 2
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