Pub Date : 2021-04-08DOI: 10.5194/EGQSJ-70-93-2021
C. Flaux, M. Giaime, V. Pichot, N. Marriner, Mena el-Assal, A. Guihou, P. Deschamps, C. Claude, C. Morhange
Abstract. Lake Maryut (northwestern Nile Delta, Egypt) was a key feature of Alexandria's hinterland and economy during Greco-Roman times. Its shores accommodated major economic centers, and the lake acted as a gateway between the Nile valley and the Mediterranean. It is suggested that lake-level changes, connections with the Nile and the sea, and possible high-energy events considerably shaped the human occupation history of the Maryut. To reconstruct Lake Maryut hydrology in historical times, we used faunal remains, geochemistry (Sr isotopic signature of ostracods) and geoarcheological indicators of relative lake-level changes. The data show both a rise in Nile inputs to the basin during the first millennia BCE and CE and a lake-level rise of ca. 1.5 m during the Roman period. A high-energy deposit, inferred from reworked radiocarbon dates, may explain an enigmatic sedimentary hiatus previously attested to in Maryut's chronostratigraphy.
{"title":"The late Holocene record of Lake Mareotis, Nile Delta, Egypt","authors":"C. Flaux, M. Giaime, V. Pichot, N. Marriner, Mena el-Assal, A. Guihou, P. Deschamps, C. Claude, C. Morhange","doi":"10.5194/EGQSJ-70-93-2021","DOIUrl":"https://doi.org/10.5194/EGQSJ-70-93-2021","url":null,"abstract":"Abstract. Lake Maryut (northwestern Nile Delta, Egypt) was a key feature of\u0000Alexandria's hinterland and economy during Greco-Roman times. Its shores\u0000accommodated major economic centers, and the lake acted as a gateway between\u0000the Nile valley and the Mediterranean. It is suggested that lake-level\u0000changes, connections with the Nile and the sea, and possible high-energy\u0000events considerably shaped the human occupation history of the Maryut. To\u0000reconstruct Lake Maryut hydrology in historical times, we used faunal\u0000remains, geochemistry (Sr isotopic signature of ostracods) and\u0000geoarcheological indicators of relative lake-level changes. The data show\u0000both a rise in Nile inputs to the basin during the first millennia BCE and CE\u0000and a lake-level rise of ca. 1.5 m during the Roman period. A high-energy\u0000deposit, inferred from reworked radiocarbon dates, may explain an enigmatic\u0000sedimentary hiatus previously attested to in Maryut's chronostratigraphy.\u0000","PeriodicalId":11420,"journal":{"name":"E&G Quaternary Science Journal","volume":"32 1","pages":"93-104"},"PeriodicalIF":0.0,"publicationDate":"2021-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91260194","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 : 2021-02-08DOI: 10.5194/EGQSJ-70-53-2021
N. Rahimzadeh, Tobias Sprafke, C. Thiel, B. Terhorst, M. Frechen
Abstract. Loess-paleosol sequences (LPSs) are essential records for reconstructing Quaternary paleoenvironments. No previous study has provided numerical chronologies of loess in Lower Franconia, southern Germany; their chronostratigraphic assumptions have relied mainly on German (pedo)stratigraphic schemes. In this study, we provide for the first time a chronology for LPSs in Lower Franconia based on optically stimulated luminescence (OSL) dating using quartz and a comparison of K-feldspar (63–100 µm) and the polymineral fraction (4–11 µm). Our results show that all obtained ages are in stratigraphic order, ranging from Holocene to late Pleistocene, and in general confirm the former stratigraphical interpretations. A good agreement of the obtained ages is observed between both feldspar grain size fractions; they also agree well with the quartz OSL ages up to ∼50 ka. However, a marked difference between the growth pattern of the dose response curves and consequently different saturation characteristics of fine and coarse grains is found. Even though in our samples the discrepancy in ages is not very significant, we suggest the use of coarse-grained K-feldspar whenever possible in order to not be confronted with unknowns such as the mineral composition of the polymineral fraction.
{"title":"A comparison of polymineral and K-feldspar post-infrared infrared stimulated luminescence ages of loess from Franconia, southern Germany","authors":"N. Rahimzadeh, Tobias Sprafke, C. Thiel, B. Terhorst, M. Frechen","doi":"10.5194/EGQSJ-70-53-2021","DOIUrl":"https://doi.org/10.5194/EGQSJ-70-53-2021","url":null,"abstract":"Abstract. Loess-paleosol sequences (LPSs) are essential records for reconstructing Quaternary paleoenvironments. No previous study has provided\u0000numerical chronologies of loess in Lower Franconia, southern Germany; their\u0000chronostratigraphic assumptions have relied mainly on German\u0000(pedo)stratigraphic schemes. In this study, we provide for the first time a\u0000chronology for LPSs in Lower Franconia based on optically stimulated\u0000luminescence (OSL) dating using quartz and a comparison of K-feldspar\u0000(63–100 µm) and the polymineral fraction (4–11 µm). Our results show that all obtained ages are in stratigraphic order, ranging from\u0000Holocene to late Pleistocene, and in general confirm the former\u0000stratigraphical interpretations. A good agreement of the obtained ages is\u0000observed between both feldspar grain size fractions; they also agree well\u0000with the quartz OSL ages up to ∼50 ka. However, a marked\u0000difference between the growth pattern of the dose response curves and\u0000consequently different saturation characteristics of fine and coarse grains\u0000is found. Even though in our samples the discrepancy in ages is not very\u0000significant, we suggest the use of coarse-grained K-feldspar whenever\u0000possible in order to not be confronted with unknowns such as the mineral\u0000composition of the polymineral fraction.\u0000","PeriodicalId":11420,"journal":{"name":"E&G Quaternary Science Journal","volume":"115 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73400610","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 : 2021-01-26DOI: 10.5194/EGQSJ-70-29-2021
R. Schiestl
Abstract. The Butic Canal – a Roman period transversal route across the northern Nile Delta – was the longest artificial watercourse in the Nile Delta, yet it remains very poorly understood. To date, the canal has not yet been verified by archeological excavations. The route of the eastern section of the canal has been indirectly identified based on a linear elevated feature most likely representing earth from the excavation of the canal. This study combines the analysis of historical sources and remote sensing data, such as satellite imagery and the TanDEM-X digital elevation model, in order to discuss its date of construction, route, and functions. Based on the data of the digital elevation model, new constructional features are visible in the eastern delta providing the first detailed route of a Roman-era artificial watercourse in Egypt. It is suggested that the canal's construction is placed in the context of imperial investments in the infrastructure of the eastern part of the Roman empire.
{"title":"A new look at the Butic Canal, Egypt","authors":"R. Schiestl","doi":"10.5194/EGQSJ-70-29-2021","DOIUrl":"https://doi.org/10.5194/EGQSJ-70-29-2021","url":null,"abstract":"Abstract. The Butic Canal – a Roman period transversal route across\u0000the northern Nile Delta – was the longest artificial watercourse in the Nile\u0000Delta, yet it remains very poorly understood. To date, the canal has not yet\u0000been verified by archeological excavations. The route of the eastern\u0000section of the canal has been indirectly identified based on a linear\u0000elevated feature most likely representing earth from the excavation of the\u0000canal. This study combines the analysis of historical sources and remote\u0000sensing data, such as satellite imagery and the TanDEM-X digital elevation\u0000model, in order to discuss its date of construction, route, and functions.\u0000Based on the data of the digital elevation model, new constructional\u0000features are visible in the eastern delta providing the first detailed\u0000route of a Roman-era artificial watercourse in Egypt. It is suggested that\u0000the canal's construction is placed in the context of imperial investments in\u0000the infrastructure of the eastern part of the Roman empire.\u0000","PeriodicalId":11420,"journal":{"name":"E&G Quaternary Science Journal","volume":"136 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74220718","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 : 2021-01-15DOI: 10.5194/EGQSJ-70-19-2021
M. Khaled
Abstract. Having control over the landscape played an important role in the geography and economy of Egypt from the predynastic period onwards. Especially from the beginning of the Old Kingdom, we have evidence that kings created new places (funerary domains) called (centers) and (Ezbah) for the equipment of the building projects of the royal tomb and the funerary cult of the king, as well as to ensure the eternal life of both kings and individuals. Kings used these localities in order to do so, and they oftentimes expanded the border of an existing nome and created new establishments. Consequently, these establishments were united or divided into new nomes. The paper discusses the geography of Lower Egypt and the associated royal domains in the early Fifth Dynasty based on the new discoveries from the causeway of Sahura at Abusir.
{"title":"Nomes of Lower Egypt in the early Fifth Dynasty","authors":"M. Khaled","doi":"10.5194/EGQSJ-70-19-2021","DOIUrl":"https://doi.org/10.5194/EGQSJ-70-19-2021","url":null,"abstract":"Abstract. Having control over the landscape played an important\u0000role in the geography and economy of Egypt from the predynastic period\u0000onwards. Especially from the beginning of the Old Kingdom, we have evidence\u0000that kings created new places (funerary domains) called (centers) and\u0000 (Ezbah) for the equipment of the building projects of the royal tomb and\u0000the funerary cult of the king, as well as to ensure the eternal life of both\u0000kings and individuals. Kings used these localities in order to do so, and they\u0000oftentimes expanded the border of an existing nome and created new\u0000establishments. Consequently, these establishments were united or divided\u0000into new nomes. The paper discusses the geography of Lower Egypt and the\u0000associated royal domains in the early Fifth Dynasty based on the new\u0000discoveries from the causeway of Sahura at Abusir.\u0000","PeriodicalId":11420,"journal":{"name":"E&G Quaternary Science Journal","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86157154","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 : 2021-01-01DOI: 10.5194/egqsj-70-191-2021
C. Zeeden, J. Mir, M. Vinnepand, Christian Laag, C. Rolf, R. Dar
{"title":"Local mineral dust transported by varying wind intensities forms the main substrate for loess in Kashmir","authors":"C. Zeeden, J. Mir, M. Vinnepand, Christian Laag, C. Rolf, R. Dar","doi":"10.5194/egqsj-70-191-2021","DOIUrl":"https://doi.org/10.5194/egqsj-70-191-2021","url":null,"abstract":"<jats:p> </jats:p>","PeriodicalId":11420,"journal":{"name":"E&G Quaternary Science Journal","volume":"136 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86306817","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 : 2020-12-14DOI: 10.5194/egqsj-69-247-2020
H. von Suchodoletz, C. Richter, F. Walther, M. Bliedtner, Mariam Eloshvili, L. Losaberidze, B. Hausdorf
Abstract. During the last decades, rivers and their deposits in different regions were intensively studied to better understand the late-Quaternary landscape evolution and former human activities. One proxy for paleoecological and paleoclimatic reconstructions is the analysis of gastropods (snails) from carbonatic river sediments. In the scope of this study, we investigated gastropod assemblages from a Holocene fluvial sediment–paleosol sequence at the upper Alazani River in the southeastern Caucasus. On the one hand, we aimed to derive reliable independent information about possible long-lasting human activity since the late Neolithic–Chalcolithic in the upper Alazani floodplain. This was formerly suggested by n-alkane biomarker vegetation reconstructions from the fluvial sediments. However, the reliability of that method is still debated. On the other hand, we aimed to obtain reliable information about a formerly suggested, possibly tectonic-driven, large-scale shift of the river course during the Late Holocene. In agreement with the n-alkane biomarkers, our results demonstrate that the studied site was free of the natural forests during the Early and Middle Holocene until ca. 4.5 cal kyr BP. Since this contrasts with a pollen-based vegetation reconstruction from a neighboring floodplain that was covered with forests during that time, the open vegetation in the upper Alazani valley was probably caused by continuous settlement activity as is also indicated by archeological finds in the sequence. Therefore, using our paleoecological proxies it is possible that we identified a settlement center in the upper Alazani floodplain that was populated from the late Neolithic–Chalcolithic. This center was not known thus far, since the settlement remains are covered by thick floodloam today that hindered their detection during archeological surface surveys. Therefore, our findings suggest that the area in the southern Caucasus region that was settled during the late-Neolithic–Chalcolithic period should have been larger than was known thus far. Furthermore, increasing contributions of wetland gastropods since ca. 4 cal kyr BP confirm a local shift of the river course towards the investigated site during the Late Holocene, possibly linked with ongoing tectonic activity. However, in contrast to former suggestions our gastropod assemblages indicate a slow rather than abrupt process. Our study demonstrates the high value of gastropod assemblages for geoarcheological and geomorphological research in floodplains with carbonatic river sediments at both a regional and local spatial scale.
摘要在过去的几十年里，人们对不同地区的河流及其沉积物进行了深入的研究，以更好地了解晚第四纪的景观演变和以前的人类活动。古生态和古气候重建的一个代用指标是对碳酸盐河流沉积物中腹足类(蜗牛)的分析。在本研究的范围内，我们研究了来自高加索东南部Alazani河上游全新世河流沉积-古太阳层序的腹足类动物组合。一方面，我们的目标是获得可靠的独立信息，说明阿拉扎尼上游洪泛平原自新石器-铜石器时代晚期以来可能存在的长期人类活动。这是由河流沉积物的正构烷烃生物植被重建所证实的。然而，这种方法的可靠性仍然存在争议。另一方面，我们的目标是获得可靠的信息，关于以前提出的，可能是构造驱动的，晚全新世期间河道的大规模移动。与正构烷烃生物标志物一致，我们的研究结果表明，在大约4.5 cal kyr BP之前，研究地点在全新世早期和中期没有天然森林。由于这与当时被森林覆盖的邻近洪泛区所重建的以阿波罗为基础的植被形成对比，因此，正如序列中的考古发现所表明的那样，上阿拉扎尼山谷的开阔植被可能是由持续的定居活动造成的。因此，利用我们的古生态指标，我们有可能在Alazani上游洪泛区确定一个新石器-铜石器时代晚期居住的聚落中心。到目前为止，这个中心还不为人所知，因为这些定居点遗址现在被厚厚的洪泛土覆盖，阻碍了考古表面调查的发现。因此，我们的发现表明，在新石器时代晚期-铜石器时代，南高加索地区的定居地区应该比目前已知的要大。此外，自约4 calkyr BP以来，湿地腹足类动物的贡献增加，证实了晚全新世期间河道向调查地点的局部转移，可能与持续的构造活动有关。然而，与之前的观点相反，腹足类动物的组合表明了一个缓慢而非突然的过程。我们的研究表明腹足类组合在区域和局部空间尺度上对具有碳酸盐河流沉积的洪泛平原的地质考古和地貌研究具有很高的价值。
{"title":"Snail assemblages in Holocene floodplain research – an example from the southern Caucasus","authors":"H. von Suchodoletz, C. Richter, F. Walther, M. Bliedtner, Mariam Eloshvili, L. Losaberidze, B. Hausdorf","doi":"10.5194/egqsj-69-247-2020","DOIUrl":"https://doi.org/10.5194/egqsj-69-247-2020","url":null,"abstract":"Abstract. During the last decades, rivers and their deposits in different\u0000regions were intensively studied to better understand the late-Quaternary\u0000landscape evolution and former human activities. One proxy for\u0000paleoecological and paleoclimatic reconstructions is the analysis of gastropods\u0000(snails) from carbonatic river sediments. In the scope of this study, we\u0000investigated gastropod assemblages from a Holocene fluvial sediment–paleosol\u0000sequence at the upper Alazani River in the southeastern Caucasus. On the one\u0000hand, we aimed to derive reliable independent information about possible\u0000long-lasting human activity since the late Neolithic–Chalcolithic in the\u0000upper Alazani floodplain. This was formerly suggested by n-alkane biomarker\u0000vegetation reconstructions from the fluvial sediments. However, the\u0000reliability of that method is still debated. On the other hand, we aimed to\u0000obtain reliable information about a formerly suggested, possibly\u0000tectonic-driven, large-scale shift of the river course during the Late\u0000Holocene. In agreement with the n-alkane biomarkers, our results demonstrate\u0000that the studied site was free of the natural forests during the Early and\u0000Middle Holocene until ca. 4.5 cal kyr BP. Since this contrasts with a\u0000pollen-based vegetation reconstruction from a neighboring floodplain that\u0000was covered with forests during that time, the open vegetation in the upper\u0000Alazani valley was probably caused by continuous settlement activity as is\u0000also indicated by archeological finds in the sequence. Therefore, using our\u0000paleoecological proxies it is possible that we identified a settlement\u0000center in the upper Alazani floodplain that was populated from the late Neolithic–Chalcolithic. This center was not known thus far, since the\u0000settlement remains are covered by thick floodloam today that hindered their\u0000detection during archeological surface surveys. Therefore, our findings\u0000suggest that the area in the southern Caucasus region that was settled\u0000during the late-Neolithic–Chalcolithic period should have been larger than\u0000was known thus far. Furthermore, increasing contributions of wetland\u0000gastropods since ca. 4 cal kyr BP confirm a local shift of the river course\u0000towards the investigated site during the Late Holocene, possibly linked with\u0000ongoing tectonic activity. However, in contrast to former suggestions our\u0000gastropod assemblages indicate a slow rather than abrupt process. Our study\u0000demonstrates the high value of gastropod assemblages for geoarcheological\u0000and geomorphological research in floodplains with carbonatic river sediments\u0000at both a regional and local spatial scale.\u0000","PeriodicalId":11420,"journal":{"name":"E&G Quaternary Science Journal","volume":"176 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73959928","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 : 2020-10-30DOI: 10.5194/egqsj-69-201-2020
C. Lüthgens, Jacob Hardt, M. Böse
Abstract. We propose a new concept of the Weichselian ice dynamics in the south-western sector of the Baltic Sea depression. The review of existing geochronological data from Germany, Denmark and southernmost Sweden in combination with new optically stimulated luminescence (OSL) data from the German Oder Lobe area is the basis for a reassessment and an improvement of previous ice dynamic models. Factors like the pre-existing topography, glaciotectonic features and the occurrence of till beds and inter-till deposits of varying origin are also taken into consideration for our process-based reconstruction of the sedimentary environments close to the ice margin and hence the ice dynamics of the Scandinavian Ice Sheet (SIS). During the early MIS 3 (marine isotope stage), the late MIS 3 and MIS 2, the SIS advanced into present-day terrestrial areas around the south-western Baltic Sea Basin. The first ice advance during the warming phase in early MIS 3 is poorly documented as the Ellund–Warnow Advance in Germany but may be correlated with the numerically dated Ristinge Advance in Denmark and Sweden. The late MIS 3 advance in contrast is reliably documented. It shaped the landforms of the Brandenburg Advance and the maximum Weichselian ice extent in the Oder Lobe area in north-eastern Germany and occurred contemporaneously with the Klintholm Advance in southern Sweden and Denmark. The lack of a corresponding till in various cliff profiles along the Baltic Sea coastline between southern Schleswig-Holstein and the island of Rügen can be explained by the distinct lobate structure of this ice advance, which was strongly guided by the pre-existing low-lying topography. We propose the horst of Bornholm, Denmark, acting as an ice divide, with ice-dammed lakes existing on the lee side between two glacier lobes. This lobate structure had not been considered in previous conceptual models, which led to seemingly conflicting chronological and stratigraphical interpretations. Our introduction of the lobate structure for the first time resolves these contradictions and integrates the data in a coherent model. The dynamics of the MIS 2 readvance to the Last Glacial Maximum (LGM) extent were clearly different to the previous advance and were most likely characterized by a more uniformly advancing ice front with a less lobate structure which also overrode the horst of Bornholm and the island of Rügen. This advance reached the maximum Weichselian ice extent in some parts of the south-western SIS, but, in the Oder Lobe area, it is proven to have terminated at a lesser extent than the early MIS 3 advance, but it did shape the most prominent morphological landform record of the last glacial cycle. In order to advance the reconstruction of Weichselian ice dynamics in the future, we strongly suggest using both an MIS-based terminology and a process-based approach in the interpretation of geochronological data to live up to the dynamic nature of continental ice sheets.
{"title":"Proposing a new conceptual model for the reconstruction of ice dynamics in the SW sector of the Scandinavian Ice Sheet (SIS) based on the reinterpretation of published data and new evidence from optically stimulated luminescence (OSL) dating","authors":"C. Lüthgens, Jacob Hardt, M. Böse","doi":"10.5194/egqsj-69-201-2020","DOIUrl":"https://doi.org/10.5194/egqsj-69-201-2020","url":null,"abstract":"Abstract. We propose a new concept of the Weichselian ice dynamics in the south-western sector of the Baltic Sea depression. The review of existing geochronological data from Germany, Denmark and southernmost Sweden in combination with new optically stimulated luminescence (OSL) data from the German Oder Lobe area is the basis for a reassessment and an improvement of previous ice dynamic models. Factors like the pre-existing topography, glaciotectonic features and the occurrence of till beds and inter-till deposits of varying origin are also taken into consideration for our process-based reconstruction of the sedimentary environments close to the ice margin and hence the ice dynamics of the Scandinavian Ice Sheet (SIS). During the early MIS 3 (marine isotope stage), the late MIS 3 and MIS 2, the SIS advanced into present-day terrestrial areas around the south-western Baltic Sea Basin. The first ice advance during the warming phase in early MIS 3 is poorly documented as the Ellund–Warnow Advance in Germany but may be correlated with the numerically dated Ristinge Advance in Denmark and Sweden. The late MIS 3 advance in contrast is reliably documented. It shaped the landforms of the Brandenburg Advance and the maximum Weichselian ice extent in the Oder Lobe area in north-eastern Germany and occurred contemporaneously with the Klintholm Advance in southern Sweden and Denmark. The lack of a corresponding till in various cliff profiles along the Baltic Sea coastline between southern Schleswig-Holstein and the island of Rügen can be explained by the distinct lobate structure of this ice advance, which was strongly guided by the pre-existing low-lying topography. We propose the horst of Bornholm, Denmark, acting as an ice divide, with ice-dammed lakes existing on the lee side between two glacier lobes. This lobate structure had not been considered in previous conceptual models, which led to seemingly conflicting chronological and stratigraphical interpretations. Our introduction of the lobate structure for the first time resolves these contradictions and integrates the data in a coherent model. The dynamics of the MIS 2 readvance to the Last Glacial Maximum (LGM) extent were clearly different to the previous advance and were most likely characterized by a more uniformly advancing ice front with a less lobate structure which also overrode the horst of Bornholm and the island of Rügen. This advance reached the maximum Weichselian ice extent in some parts of the south-western SIS, but, in the Oder Lobe area, it is proven to have terminated at a lesser extent than the early MIS 3 advance, but it did shape the most prominent morphological landform record of the last glacial cycle. In order to advance the reconstruction of Weichselian ice dynamics in the future, we strongly suggest using both an MIS-based terminology and a process-based approach in the interpretation of geochronological data to live up to the dynamic nature of continental ice sheets.","PeriodicalId":11420,"journal":{"name":"E&G Quaternary Science Journal","volume":"97 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76110015","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 : 2020-05-27DOI: 10.5194/egqsj-69-55-2020
D. Faust, S. Kreutzer, Yesmine Trigui, Maximilian Pachtmann, Georg Mettig, Moncef Bouaziz, J. M. Recio Espejo, F. Díaz del Olmo, Christoph Schmidt, T. Lauer, Ž. Režek, A. Fülling, Sascha Meszner
{"title":"New findings of Middle Stone Age lithic artifacts from the Matmata loess region in southern Tunisia","authors":"D. Faust, S. Kreutzer, Yesmine Trigui, Maximilian Pachtmann, Georg Mettig, Moncef Bouaziz, J. M. Recio Espejo, F. Díaz del Olmo, Christoph Schmidt, T. Lauer, Ž. Režek, A. Fülling, Sascha Meszner","doi":"10.5194/egqsj-69-55-2020","DOIUrl":"https://doi.org/10.5194/egqsj-69-55-2020","url":null,"abstract":"<jats:p>\u0000 </jats:p>","PeriodicalId":11420,"journal":{"name":"E&G Quaternary Science Journal","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75004984","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}
Abstract. This paper presents new palaeoecological data from north County Mayo (Co. Mayo), western Ireland, and reviews published data with a view to achieving a better understanding of the timing and nature of early farming in the region, its impact on the natural environment, and the factors, including climate change, that influenced mid- and late-Holocene vegetation dynamics and farming in the region. A long pollen profile from Glenulra, a deep basin situated within Céide Fields, and short profiles from blanket peat that overlies the prehistoric stone-wall field system provide unambiguous evidence for substantial farming, including widespread woodland clearance, in the early British and Irish Neolithic (beginning ca. 3800 BCE). This was followed by a distinct lull that lasted several centuries until farming activity resumed again, at first modestly (at ca. 2700 BCE) and then more markedly from 2350 BCE, i.e. at the Neolithic–Chalcolithic transition. It is argued on the basis of this and other palaeoecological evidence, including pollen analytical investigations at nearby Garrynagran, that, contrary to recent suggestions, there is no reason to doubt the widely held view that the stone-wall field system – unique in a western European Neolithic context – is correctly ascribable to the earlier part of the British and Irish Neolithic. The history of pine growing in bog contexts (mainly blanket bog) in the region is considered in the light of 14C dates derived from pine timbers, and the results of dendrochronological investigations at Garrynagran that have enabled two floating pine chronologies to be constructed, are presented. The climatic implications of these data are discussed within local and wider regional contexts.
{"title":"Long-term human impact and environmental change in mid-western Ireland, with particular reference to Céide Fields – an overview","authors":"M. O’Connell, Karen Molloy, Eneda Jennings","doi":"10.5194/egqsj-69-1-2020","DOIUrl":"https://doi.org/10.5194/egqsj-69-1-2020","url":null,"abstract":"Abstract. This paper presents new palaeoecological data from north\u0000County Mayo (Co. Mayo), western Ireland, and reviews published data with a view to\u0000achieving a better understanding of the timing and nature of early farming\u0000in the region, its impact on the natural environment, and the factors,\u0000including climate change, that influenced mid- and late-Holocene vegetation\u0000dynamics and farming in the region. A long pollen profile from Glenulra, a\u0000deep basin situated within Céide Fields, and short profiles from blanket\u0000peat that overlies the prehistoric stone-wall field system provide\u0000unambiguous evidence for substantial farming, including widespread woodland\u0000clearance, in the early British and Irish Neolithic (beginning ca. 3800 BCE).\u0000This was followed by a distinct lull that lasted several centuries until\u0000farming activity resumed again, at first modestly (at ca. 2700 BCE) and then\u0000more markedly from 2350 BCE, i.e. at the Neolithic–Chalcolithic transition. It\u0000is argued on the basis of this and other palaeoecological evidence,\u0000including pollen analytical investigations at nearby Garrynagran, that,\u0000contrary to recent suggestions, there is no reason to doubt the widely held\u0000view that the stone-wall field system – unique in a western European\u0000Neolithic context – is correctly ascribable to the earlier part of the\u0000British and Irish Neolithic. The history of pine growing in bog contexts (mainly\u0000blanket bog) in the region is considered in the light of 14C dates\u0000derived from pine timbers, and the results of dendrochronological\u0000investigations at Garrynagran that have enabled two floating pine\u0000chronologies to be constructed, are presented. The climatic implications of\u0000these data are discussed within local and wider regional contexts.\u0000","PeriodicalId":11420,"journal":{"name":"E&G Quaternary Science Journal","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75087772","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：