...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Quaternary Science Reviews: The International Multidisciplinary Review Journal >Younger Dryas glaciomarine sedimentation, push-moraine formation and ice-margin behavior in the Middle Swedish end-moraine zone west of Billingen, central Sweden
【24h】

Younger Dryas glaciomarine sedimentation, push-moraine formation and ice-margin behavior in the Middle Swedish end-moraine zone west of Billingen, central Sweden

机译：瑞典中部瑞典中部瑞典渡碛区中瑞典地区的较年轻的Dryas Glaciomarine沉降，推动冰碛形成和冰边缘行为

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

New highway exposures and drilling reveal the stratigraphy and structure of the Middle Swedish end-moraine zone west of Billingen, Sweden. The material in the end moraines is primarily glaciomarine clay of Younger Dryas age that was deposited as varved clay in front of the retreating glacier and then pushed glaciotectonically to form push moraines during minor ice-margin oscillations during overall retreat during the Younger Dryas cold event. The moraines are composed of deformed and remobilized clay with some clayey diamicton and penecontemporaneously deposited and deformed sand. Between the moraines lie 'intermoraine flats,' composed of undeformed varved clay of Younger Dryas age and surface sands of Younger Dryas to early Holocene age. Based on estimations of moraine volume, sedimentation rate and ice-margin retreat rates, we calculate the overall ice-margin retreat and end-moraine construction to span 350-800 years within the Younger Dryas. Because the number of moraines in the Middle Swedish end-moraine zone varies across Sweden, we regard the individual oscillations west of Billingen to be driven by local physical and glaciologic factors rather than ice-sheet wide climate drivers. The study area is also the location of the early and final drainages of the Baltic Ice Lake. The final drainage of the Baltic Ice Lake took place several decades after the youngest moraine was formed. We consider it likely that the earlier, Allerod drainage of the Baltic Ice Lake (BIL) also took place at Billingen, despite the lack of clear local stratigraphic evidence. However, based on our model, a retreat driven solely by climate would not have exposed the outlet at Billingen, and we propose a dynamic break-up of the ice-margin likely centered on Valle Harad that was driven by the head difference between the BIL and the sea. (C) 2019 The Authors. Published by Elsevier Ltd.
机译：新的公路暴露和钻探揭示了瑞典比尔泰登以西瑞典羊毛区中间羊毛区的地层和结构。最终冰片中的材料主要是较年轻的Dryas粘土的冰川甘油粘土，其沉积在退缩冰川前方的变种粘土，然后在较年轻的Dryas冷赛期间在整体撤退期间在较小的冰边振荡期间形成推动衣原体。羊叶树由含有一些粘土型氨基胺和单一的沉积和变形的沙子组成。在冰片之间的谎言之间的“国际歌剧平底鞋”，由年轻的Dryas年龄和较年轻的Dryas的表面砂粘土组成，到早期全新世时代。基于冰碛体积，沉积率和冰缘撤退率的估计，我们计算整体冰缘撤退和最终冰工建设，在较年轻的Datras内占地350-800岁。由于中间瑞典境内冰碛区的冰片人数因瑞典而异，因此我们认为比尔格登以西的个人振荡是由当地物理和冰川疾病的驱动而不是冰盖宽气候司机。研究区也是波罗的海冰湖的早期和最终排水的位置。在形成最年轻的冰片后，波罗的海冰湖的最终排水发生了几十年。我们认为，尽管缺乏清晰的当地地层证据，但是，我们认为波罗的海冰湖（BIL）的全部排水也在比尔廷根。然而，根据我们的模型，仅通过气候推动的撤退不会暴露在比尔金纳的出口，并且我们提出了一种动态的分手，该冰缘可能是由BIL之间的头部差异驱动的岩石Harad。和大海。 （c）2019年作者。 elsevier有限公司出版

著录项

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号