Pub Date : 2019-06-21DOI: 10.5194/EGQSJ-68-53-2019
D. Gaar, H. Graf, F. Preusser
Abstract. Deposits of the Reuss Glacier in the central northern Alpine foreland of Switzerland are dated using luminescence methodology. Methodological considerations on partial bleaching and fading correction of different signals imply the robustness of the results. An age of ca. 25 ka for sediment directly overlying basal lodgement till corresponds well with existing age constraints for the last maximal position of glaciers of the northern Swiss Alpine Foreland. Luminescence ages imply an earlier advance of Reuss Glacier into the lowlands during Marine Isotope Stage 4. The presented data are compared to findings from other parts of the Alps regarding glacier dynamics and palaeoclimatological implications, such as the source of precipitation during the Late Pleistocene.
{"title":"New chronological constraints on the timing of Late Pleistocene glacier advances in northern Switzerland","authors":"D. Gaar, H. Graf, F. Preusser","doi":"10.5194/EGQSJ-68-53-2019","DOIUrl":"https://doi.org/10.5194/EGQSJ-68-53-2019","url":null,"abstract":"Abstract. Deposits of the Reuss Glacier in the central northern Alpine foreland of Switzerland are dated using luminescence methodology. Methodological considerations on partial bleaching and fading correction of different signals imply the robustness of the results. An age of ca. 25 ka for sediment directly overlying basal lodgement till corresponds well with existing age constraints for the last maximal position of glaciers of the northern Swiss Alpine Foreland. Luminescence ages imply an earlier advance of Reuss Glacier into the lowlands during Marine Isotope Stage 4. The presented data are compared to findings from other parts of the Alps regarding glacier dynamics and palaeoclimatological implications, such as the source of precipitation during the Late Pleistocene.","PeriodicalId":11420,"journal":{"name":"E&G Quaternary Science Journal","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83544728","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}
Pub Date : 2019-05-16DOI: 10.5194/EGQSJ-68-29-2019
E. Dietze, M. Dietze
Abstract. The analysis of grain-size distributions has a long tradition in Quaternary Science and disciplines studying Earth surface and subsurface deposits. The decomposition of multi-modal grain-size distributions into inherent subpopulations, commonly termed end-member modelling analysis (EMMA), is increasingly recognised as a tool to infer the underlying sediment sources, transport and (post-)depositional processes. Most of the existing deterministic EMMA approaches are only able to deliver one out of many possible solutions, thereby shortcutting uncertainty in model parameters. Here, we provide user-friendly computational protocols that support deterministic as well as robust (i.e. explicitly accounting for incomplete knowledge about input parameters in a probabilistic approach) EMMA, in the free and open software framework of R. In addition, and going beyond previous validation tests, we compare the performance of available grain-size EMMA algorithms using four real-world sediment types, covering a wide range of grain-size distribution shapes (alluvial fan, dune, loess and floodplain deposits). These were randomly mixed in the lab to produce a synthetic data set. Across all algorithms, the original data set was modelled with mean R2 values of 0.868 to 0.995 and mean absolute deviation (MAD) values of 0.06 % vol to 0.34 % vol. The original grain-size distribution shapes were modelled as end-member loadings with mean R2 values of 0.89 to 0.99 and MAD of 0.04 % vol to 0.17 % vol. End-member scores reproduced the original mixing ratios in the synthetic data set with mean R2 values of 0.68 to 0.93 and MAD of 0.1 % vol to 1.6 % vol. Depending on the validation criteria, all models provided reliable estimates of the input data, and each of the models exhibits individual strengths and weaknesses. Only robust EMMA allowed uncertainties of the end-members to be objectively estimated and expert knowledge to be included in the end-member definition. Yet, end-member interpretation should carefully consider the geological and sedimentological meaningfulness in terms of sediment sources, transport and deposition as well as post-depositional alteration of grain sizes. EMMA might also be powerful in other geoscientific contexts where the goal is to unmix sources and processes from compositional data sets.
{"title":"Grain-size distribution unmixing using the R package EMMAgeo","authors":"E. Dietze, M. Dietze","doi":"10.5194/EGQSJ-68-29-2019","DOIUrl":"https://doi.org/10.5194/EGQSJ-68-29-2019","url":null,"abstract":"Abstract. The analysis of grain-size distributions has a long tradition in\u0000Quaternary Science and disciplines studying Earth surface and subsurface\u0000deposits. The decomposition of multi-modal grain-size distributions into\u0000inherent subpopulations, commonly termed end-member modelling analysis\u0000(EMMA), is increasingly recognised as a tool to infer the underlying\u0000sediment sources, transport and (post-)depositional processes. Most of the\u0000existing deterministic EMMA approaches are only able to deliver one out of\u0000many possible solutions, thereby shortcutting uncertainty in model\u0000parameters. Here, we provide user-friendly computational protocols that\u0000support deterministic as well as robust (i.e. explicitly accounting for\u0000incomplete knowledge about input parameters in a probabilistic approach)\u0000EMMA, in the free and open software framework of R. In addition, and going beyond previous validation tests, we compare the\u0000performance of available grain-size EMMA algorithms using four real-world\u0000sediment types, covering a wide range of grain-size distribution shapes\u0000(alluvial fan, dune, loess and floodplain deposits). These were randomly\u0000mixed in the lab to produce a synthetic data set. Across all algorithms, the\u0000original data set was modelled with mean R2 values of 0.868 to 0.995\u0000and mean absolute deviation (MAD) values of 0.06 % vol to 0.34 % vol. The original\u0000grain-size distribution shapes were modelled as end-member loadings with\u0000mean R2 values of 0.89 to 0.99 and MAD of 0.04 % vol to 0.17 % vol. End-member scores reproduced the original mixing ratios in the\u0000synthetic data set with mean R2 values of 0.68 to 0.93 and MAD\u0000of 0.1 % vol to 1.6 % vol. Depending on the validation criteria, all models\u0000provided reliable estimates of the input data, and each of the models\u0000exhibits individual strengths and weaknesses. Only robust EMMA allowed uncertainties of the end-members to\u0000be objectively estimated and expert knowledge to be included in the end-member definition. Yet, end-member interpretation should\u0000carefully consider the geological and sedimentological meaningfulness in\u0000terms of sediment sources, transport and deposition as well as\u0000post-depositional alteration of grain sizes. EMMA might also be powerful in\u0000other geoscientific contexts where the goal is to unmix sources and\u0000processes from compositional data sets.\u0000","PeriodicalId":11420,"journal":{"name":"E&G Quaternary Science Journal","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75673353","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}
Pub Date : 2019-05-08DOI: 10.5194/EGQSJ-68-13-2019
Clemens von Scheffer, A. Lange, F. De Vleeschouwer, J. Schrautzer, I. Unkel
Abstract. In this study, we combine erosion and anthropogenic proxies (Ti, Pb) from calibrated portable XRF with pollen and radiocarbon chronologies in peat from mires of the Kleinwalser Valley (Kleinwalsertal, Vorarlberg, Austria) to reconstruct palaeoenvironmental change and human impact in the northern central Alps. Favoured by a wetter climate, two analysed mires formed 6200 years ago in a densely forested valley. Landscape opening suggests that the first anthropogenic impact emerged around 5700 to 5300 cal BP. Contemporaneously, lead enrichment factors (Pb EFs) indicate metallurgical activities, predating the earliest archaeological evidence in the region. Pollen and erosion proxies show that large-scale deforestation and land use by agro-pastoralists took place from the mid- to late Bronze Age (3500 to 2800 cal BP). This period was directly followed by a prominent peak in Pb EF, pointing to metallurgical activities again. After 200 cal CE, a rising human impact was interrupted by climatic deteriorations in the first half of the 6th century CE, probably linked to the Late Antique Little Ice Age. The use of the characteristic Pb EF pattern of modern pollution as a time marker allows us to draw conclusions about the last centuries. These saw the influence of the Walser people, arriving in the valley after 1300 cal CE. Later, the beginning of tourism is reflected in increased erosion signals after 1950 cal CE. Our study demonstrates that prehistoric humans were intensively shaping the Kleinwalser Valley's landscape, well before the arrival of the Walser people. It also demonstrates the importance of palaeoenvironmental multiproxy studies to fill knowledge gaps where archaeological evidence is lacking.
摘要在这项研究中，我们结合了来自Kleinwalser山谷(Kleinwalsertal, Vorarlberg, Austria)泥炭的侵蚀和人为代用指标(Ti, Pb)以及花粉和放射性碳年代学，重建了阿尔卑斯中北部地区的古环境变化和人类影响。受潮湿气候的影响，6200年前在一个森林茂密的山谷中形成了两个经过分析的洞穴。景观开放表明第一次人为影响出现在5700至5300 cal BP之间。与此同时，铅富集因子(Pb EFs)表明冶金活动，比该地区最早的考古证据要早。花粉和侵蚀指标表明，大规模的森林砍伐和农牧民的土地利用发生在青铜时代中晚期(3500 ~ 2800 cal BP)。这一时期紧接着是PbEF的一个显著高峰，再次指向冶金活动。公元200年之后，人类活动的影响被公元6世纪上半叶的气候恶化所打断，这可能与古代小冰河期晚期有关。使用现代污染的特征Pb EF模式作为时间标记，使我们能够得出关于过去几个世纪的结论。这些地区受到了瓦尔泽人的影响，他们在公元1300年之后来到了这个山谷。后来，旅游业的开始反映在1950年之后的侵蚀信号增加，称为CE。我们的研究表明，早在瓦尔瑟人到来之前，史前人类就已经在密集地塑造克莱因瓦尔瑟山谷的景观。它还证明了古环境多代理研究对于填补缺乏考古证据的知识空白的重要性。
{"title":"6200 years of human activities and environmental change in the northern central Alps","authors":"Clemens von Scheffer, A. Lange, F. De Vleeschouwer, J. Schrautzer, I. Unkel","doi":"10.5194/EGQSJ-68-13-2019","DOIUrl":"https://doi.org/10.5194/EGQSJ-68-13-2019","url":null,"abstract":"Abstract. In this study, we combine erosion and anthropogenic proxies (Ti, Pb) from\u0000calibrated portable XRF with pollen and radiocarbon chronologies in peat\u0000from mires of the Kleinwalser Valley (Kleinwalsertal, Vorarlberg, Austria)\u0000to reconstruct palaeoenvironmental change and human impact in the northern\u0000central Alps. Favoured by a wetter climate, two analysed mires formed 6200 years ago in a densely forested valley. Landscape opening suggests that the\u0000first anthropogenic impact emerged around 5700 to 5300 cal BP.\u0000Contemporaneously, lead enrichment factors (Pb EFs) indicate metallurgical\u0000activities, predating the earliest archaeological evidence in the region.\u0000Pollen and erosion proxies show that large-scale deforestation and land use\u0000by agro-pastoralists took place from the mid- to late Bronze Age (3500 to\u00002800 cal BP). This period was directly followed by a prominent peak in Pb\u0000EF, pointing to metallurgical activities again. After 200 cal CE, a rising\u0000human impact was interrupted by climatic deteriorations in the first half of\u0000the 6th century CE, probably linked to the Late Antique Little Ice Age.\u0000The use of the characteristic Pb EF pattern of modern pollution as a time\u0000marker allows us to draw conclusions about the last centuries. These saw the\u0000influence of the Walser people, arriving in the valley after 1300 cal CE.\u0000Later, the beginning of tourism is reflected in increased erosion signals\u0000after 1950 cal CE. Our study demonstrates that prehistoric humans were\u0000intensively shaping the Kleinwalser Valley's landscape, well before the\u0000arrival of the Walser people. It also demonstrates the importance of\u0000palaeoenvironmental multiproxy studies to fill knowledge gaps where\u0000archaeological evidence is lacking.\u0000","PeriodicalId":11420,"journal":{"name":"E&G Quaternary Science Journal","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78838630","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}
Wolf-Rüdiger Teegen, Rosemarie Cordie, P. Over, Simon Mägdefessel, Rebecca Retzlaff, J. Stoffels
Abstract. The Roman vicus Belginum and the associated Celtic–Roman cemetery have been the subject of systematic archaeological research since 1954. Since 2004, archaeological prospections have been carried out in and around Belginum. Participants included students from the universities of Leipzig, Trier, and Munich as part of study-accompanying field work. This paper deals with the prospections of 2004 and 2016, when nearly 2 ha of land south of the federal road B327 (Hunsrückhöhenstraße) were surveyed. The study area is located on a NW-to-SE-running hillside. All non-local objects present on the surface were collected and three-dimensionally recorded. Previously in 2013, the area was geomagnetically prospected by Posselt & Zickgraf (Marburg). Both surveys revealed a hitherto unknown extent of the vicus about 200 m to the southwest. The findings date back to the late first to third centuries common era. All finds (ceramic, bricks, roof slate, glass, and metal) were recorded and analysed in a QGIS and ArcGIS environment together with lidar scans, the geomagnetic data, and other geographical information. The overall distributions of bricks and pottery were studied in detail. The distribution of bricks is in particular connected to the individual plots, while the pottery is mainly concentrated in the backyards. Regarding surveys in other Roman vici, the brick distribution could be a helpful indicator to identify plots, when no geophysical information is available.
{"title":"Archaeological prospections in the Roman vicus Belginum (Rhineland-Palatinate, Germany)","authors":"Wolf-Rüdiger Teegen, Rosemarie Cordie, P. Over, Simon Mägdefessel, Rebecca Retzlaff, J. Stoffels","doi":"10.5194/EGQSJ-68-5-2019","DOIUrl":"https://doi.org/10.5194/EGQSJ-68-5-2019","url":null,"abstract":"Abstract. The Roman vicus Belginum and the associated Celtic–Roman cemetery have been the\u0000subject of systematic archaeological research since 1954. Since 2004,\u0000archaeological prospections have been carried out in and around Belginum.\u0000Participants included students from the universities of Leipzig, Trier, and\u0000Munich as part of study-accompanying field work. This paper deals with the prospections of 2004 and 2016, when nearly 2 ha of land south of the federal road B327\u0000(Hunsrückhöhenstraße) were surveyed. The study area is located on a NW-to-SE-running hillside.\u0000All non-local objects present on the surface were collected and\u0000three-dimensionally recorded. Previously in 2013, the area was\u0000geomagnetically prospected by Posselt & Zickgraf (Marburg). Both surveys\u0000revealed a hitherto unknown extent of the vicus about 200 m to the\u0000southwest. The findings date back to the late first to third centuries common era. All finds (ceramic, bricks, roof slate, glass, and metal) were recorded and\u0000analysed in a QGIS and ArcGIS environment together with lidar scans, the\u0000geomagnetic data, and other geographical information. The overall\u0000distributions of bricks and pottery were studied in detail. The distribution\u0000of bricks is in particular connected to the individual plots, while the\u0000pottery is mainly concentrated in the backyards. Regarding surveys in other\u0000Roman vici, the brick distribution could be a helpful indicator to identify\u0000plots, when no geophysical information is available.\u0000","PeriodicalId":11420,"journal":{"name":"E&G Quaternary Science Journal","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84285185","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}
{"title":"Quaternary fluvial environments in NE Morocco inferred from geochronological and sedimentological investigations","authors":"M. Bartz","doi":"10.5194/EGQSJ-68-1-2019","DOIUrl":"https://doi.org/10.5194/EGQSJ-68-1-2019","url":null,"abstract":"<jats:p>\u0000 </jats:p>","PeriodicalId":11420,"journal":{"name":"E&G Quaternary Science Journal","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89442838","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}
Pub Date : 2019-01-15DOI: 10.5194/EGQSJ-67-73-2019
J. Tolksdorf, Matthias Schubert, Frank Schröder, L. Petr, Christoph Herbig, Petr Kočár, Mathias Bertuch, Christiane Hemker
Abstract. Geoarchaeological reconstructions of land-use changes may help to reveal driving cultural factors and incentives behind these processes and relate them to supra-regional economic and political developments. This is particularly true in the context of complete abandonment of a settlement. Here we present a case study from the site of Faule Pfütze, a small catchment in the Eastern Ore Mountains (Saxony). The historical record of this site is confined to the report of a settlement called Hohenwalde in 1404 CE and two later references to the then-abandoned settlement in 1492 and 1524 CE in this area. Combined geoarchaeological studies allowed for the reconstruction of several phases of land use. While a first phase of alluvial sedimentation occurred during the late 12th century, archaeological evidence for a permanent settlement is absent during this period. The onset of settlement activity is identified during the late 14th century and included a hitherto unknown massive stone building. Mining features are present nearby and are dated to the early 15th century. The local palynological record shows evidence for reforestation during the mid 15th century and thereby corroborates the time of abandonment indicated by written sources. These processes are discussed in the context of a local political conflict (Dohna Feud) leading to the redistribution of properties and the development of a mining economy during this time. Later land use from the mid 16th century onwards appears restricted to charcoal production, probably in the context of smelting works operating in nearby Schmiedeberg as indicated by rising lead concentrations in the alluvial record.
{"title":"Fortification, mining, and charcoal production: landscape history at the abandoned medieval settlement of Hohenwalde at the Faule Pfütze (Saxony, Eastern Ore Mountains)","authors":"J. Tolksdorf, Matthias Schubert, Frank Schröder, L. Petr, Christoph Herbig, Petr Kočár, Mathias Bertuch, Christiane Hemker","doi":"10.5194/EGQSJ-67-73-2019","DOIUrl":"https://doi.org/10.5194/EGQSJ-67-73-2019","url":null,"abstract":"Abstract. Geoarchaeological reconstructions of land-use changes may help to reveal\u0000driving cultural factors and incentives behind these processes and relate\u0000them to supra-regional economic and political developments. This is\u0000particularly true in the context of complete abandonment of a settlement.\u0000Here we present a case study from the site of Faule Pfütze, a small\u0000catchment in the Eastern Ore Mountains (Saxony). The historical record of\u0000this site is confined to the report of a settlement called Hohenwalde in\u00001404 CE and two later references to the then-abandoned settlement in 1492 and\u00001524 CE in this area. Combined geoarchaeological studies allowed for the\u0000reconstruction of several phases of land use. While a first phase of alluvial\u0000sedimentation occurred during the late 12th century, archaeological\u0000evidence for a permanent settlement is absent during this period. The onset\u0000of settlement activity is identified during the late 14th century and\u0000included a hitherto unknown massive stone building. Mining features are\u0000present nearby and are dated to the early 15th century. The local\u0000palynological record shows evidence for reforestation during the\u0000mid 15th century and thereby corroborates the time of abandonment\u0000indicated by written sources. These processes are discussed in the context of\u0000a local political conflict (Dohna Feud) leading to the redistribution of\u0000properties and the development of a mining economy during this time. Later\u0000land use from the mid 16th century onwards appears restricted to\u0000charcoal production, probably in the context of smelting works operating in\u0000nearby Schmiedeberg as indicated by rising lead concentrations in the\u0000alluvial record.\u0000","PeriodicalId":11420,"journal":{"name":"E&G Quaternary Science Journal","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90330806","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}
Pub Date : 2019-01-10DOI: 10.5194/EGQSJ-67-41-2019
J. Deák, F. Preusser, M. Cattin, Jean-Christophe Castel, François-Xavier Chauvière
Abstract. Cotencher cave is one of the oldest Palaeolithic sites of Switzerland and is known for its rich faunal and Mousterian artefacts, the latter suggesting one or several passages of Neanderthal hunter–gatherer tribes. This interdisciplinary study summarises novel data concerning site formation processes and anthropic attendance of the site. While the lithic artefacts indicate tool production at the site, the faunal remains do not yield any evidence of a link to human occupation. The sedimentary sequence permits us to unravel several important environmental changes that occurred during the Late Pleistocene. The presence of a local glacier around 70 ka (Marine Isotope Stage, MIS 4) is revealed followed by ice-free conditions characterised by alternating soil formation processes and landscape destabilisation during MIS 3. Solifluction processes suggesting recurrent frozen ground were responsible for the displacements of part of the artefacts and faunal remains. Evidence of local glacier development around 36 ka is related to the particular geomorphological conditions of the studied region and shed new light on the complexity of glacier dynamics. The recognition and dating of recurrent hostile glacier landscapes might contribute to understanding the reasons for the Middle and Upper Palaeolithic attendance hiatuses known in the studied region.
{"title":"New data from the Middle Palaeolithic Cotencher cave (Swiss Jura): site formation, environment, and chronology","authors":"J. Deák, F. Preusser, M. Cattin, Jean-Christophe Castel, François-Xavier Chauvière","doi":"10.5194/EGQSJ-67-41-2019","DOIUrl":"https://doi.org/10.5194/EGQSJ-67-41-2019","url":null,"abstract":"Abstract. Cotencher cave is one of the oldest Palaeolithic sites of Switzerland and is known for its rich faunal and Mousterian artefacts, the latter suggesting one or several passages of Neanderthal hunter–gatherer tribes. This interdisciplinary study summarises novel data concerning site formation processes and anthropic attendance of the site. While the lithic artefacts indicate tool production at the site, the faunal remains do not yield any evidence of a link to human occupation. The sedimentary sequence permits us to unravel several important environmental changes that occurred during the Late Pleistocene. The presence of a local glacier around 70 ka (Marine Isotope Stage, MIS 4) is revealed followed by ice-free conditions characterised by alternating soil formation processes and landscape destabilisation during MIS 3. Solifluction processes suggesting recurrent frozen ground were responsible for the displacements of part of the artefacts and faunal remains. Evidence of local glacier development around 36 ka is related to the particular geomorphological conditions of the studied region and shed new light on the complexity of glacier dynamics. The recognition and dating of recurrent hostile glacier landscapes might contribute to understanding the reasons for the Middle and Upper Palaeolithic attendance hiatuses known in the studied region.","PeriodicalId":11420,"journal":{"name":"E&G Quaternary Science Journal","volume":"102 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90075328","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}
Pub Date : 2018-11-23DOI: 10.5194/EGQSJ-67-37-2018
F. Hofmann
{"title":"Glacial history of the upper Drac Blanc catchment (Écrins massif, French Alps)","authors":"F. Hofmann","doi":"10.5194/EGQSJ-67-37-2018","DOIUrl":"https://doi.org/10.5194/EGQSJ-67-37-2018","url":null,"abstract":"<jats:p>\u0000 </jats:p>","PeriodicalId":11420,"journal":{"name":"E&G Quaternary Science Journal","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83614672","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}
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