Latest Pleistocene and Holocene chronology of an eventful fluvial history.- The Rio Galera in North-Eastern Andalusia

多事的河流历史的最新更新世和全新世年表。- 安达卢西亚东北部的加莱拉河

• 批准号: 367255693
• 负责人: Professor Dr. Dominik Faust
• 金额: --
• 依托单位: Professur für Physische Geographie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/367255693?language=en
• 关键词: Latest; Pleistocene; Holocene; chronology; eventful

The main objective of the project is to establish a high-resolution chronology of the eventful fluvial history of the Rio Galera over the last 17000 years. The project will complete preliminary work that was done in order to detect characteristic fluvial sedimentation features. Dating will be realized on charcoal pieces, on organic macro remnants and on organogenic sediment layers, that are abundant in all profiles. We aim to reconstruct phases of the eventful fluvial history by dating the well distinctive and heterogenous sediment layers. From a first view we observed fine sedimentation in an early phase alternating with coarser layers indicating a change in flow velocity. The sequence (several profiles) is about 15 meters thick and ends with travertine layers alternating with intercalated floodplain sediments. Sedimentation is sometimes interrupted by short soil formation phases (initial soil forming features) or erosion phases indicated by incision features. Another objective of this project is to help solving the question whether the assumed climate forcing of the sedimentation process is superimposed by tectonic activity. Within the scope of the project we aim to supervise a Master thesis that will focus on the entire catchment of the Rio Galera (about 300 square kilometer) in order to investigate different river sections (upstream - downstream). The question is whether sedimentation features can be traced along the river course (degree of connectivity) or if different sections show different sedimentation features. The Baza-basin, in which the Rio Galera incised, is an endorheic depression formed during Plio-Pleistocene that was captured by the Rio Guadahortuna (Guadiana menor) which in fact is one of the frontal flow of the Rio Guadalquivir. The incision of the Rio Galera into the Plio-Pleistocene marls occurred during the middle and late Pleistocene indicated by fluvial stack terraces. After the youngest incision phase of the Rio Galera that is assumed to have happened during latest Pleistocene, this eventful but unexplored part of the fluvial history, in which sedimentation, stillstand and incision alternate, started. By means of a high-resolution chronology of the Rio Galera fluvial dynamics we will be able to contextualize this outstanding profile and compare them to important environmental archives of Andalusia and Central Spain.

该项目的主要目的是在过去的17000年中建立里约热内卢河流历史的高分辨率年表。该项目将完成为了检测特征性河流沉积特征而完成的初步工作。约会将在木炭碎片，有机宏观残余物和有机矿石层上实现，这些层均丰富。我们的目的是通过与良好的独特和异质的沉积物层约会来重建河流病史的阶段。从初步角度来看，我们观察到早期的良好沉积物与更粗的层交替，表明流速变化。序列（几个轮廓）约为15米，末端的螺旋线层与插入的洪泛区沉积物交替。有时会被短的土壤形成阶段（初始土壤形成特征）或切口特征指示的侵蚀阶段中断。该项目的另一个目的是帮助解决一个问题，是否被构造活动叠加了假定的气候强迫。在项目的范围内，我们旨在监督一项主论文，该论文将集中在里约加勒拉（Rio Galera）（约300平方公里）的整个集水区，以研究不同的河流区域（上游 - 下游）。问题是，是否可以沿着河流路线（连通性）追踪沉积特征，或者不同部分是否显示出不同的沉积特征。里约热内卢（Rio Galera）切尔拉（Rio Galera）切尔拉（Rio Galera）被切入的集市 - 巴桑（Baza-Basin）是在Plio-Pleisteen中形成的内性抑郁症，它是由Ri​​o Guadahortuna（Guadiana Menor）捕获的，实际上是Rio Guadalquivir的额叶流动之一。里约加莱拉（Rio Galera）切入Plio-pepleisteene Marls发生在河流堆栈露台中的中期和更新世晚期。在最新的加利拉（Rio Galera）的最年轻的切口阶段被认为是在最新更新世期间发生的，这是河流历史上发生的多事但未开发的部分，其中沉积，仍然保持稳定和切口交替开始。通过Rio Galera Fluvial动力学的高分辨率年表，我们将能够将这种出色的个人资料与安达卢西亚和西班牙中部的重要环境档案进行比较。