Chronology of fluvial erosion. - A scenario of quaternary geodynamics from the model region Baza/Guadix.

位于安达卢西亚东北部的巴扎/瓜迪克斯盆地，面积约6000km2，中更新世以前为内陆洼陷，沉积了来自边框山脉的各种粒度的沉积物。沉积开始于上新世前不久。后来，这个盆地被瓜达尔基尔河的源头占领，直到今天，瓜达尔基尔河的源头已经深入到300米深的沉积物中。自截流以来，消退侵蚀已达90多公里。捕获发生的时间仍然是密集的科学讨论的主题，尽管对此的假设在1000ka到43ka之间变化。然而，可以假设捕获的时间不会早于50万年前。在地貌研究中，后向侵蚀的概念仍然有许多问题没有得到解答。在考虑的时间段内，反向侵蚀是如何发生的，最重要的是以什么速度发生，目前还没有进行研究。拟议项目的目的是近似该模型区域的侵蚀切割和退化侵蚀的速率，并更好地界定捕获的时间。合适的时间标志是河流以阶地沉积形式的山谷充填，也包括不同世代的钙华和烧结层，它们是由于泉水出露而在山谷两侧切割河流后形成的。我们将能够通过绘制和记录山谷填充物以及广泛的年代来模拟反向侵蚀。通过这种方法，项目的实施将极大地拓展人们对后向侵蚀现象的认识和认识，为该示范区第四纪景观的发展做出重要贡献。

The basin of Baza/Guadix in the northeastern part of Andalusia with a size of about 6000km2 was until the Middle Pleistocene an endorheic depression, into which sediments of all grain sizes originated from the framing mountains were deposited. Deposition started shortly before the Pliocene. Later the basin was captured by the head-waters of the Rio Guadalquivir, which have incised into the sediments to a depth of 300 meters until today. Since the time of capturing, the regressive erosion has reached a river length of more than 90 km. When the capture took place is still subject of intensive scientific discussion, although the assumptions on this vary between 1000 ka and 43 ka. However, it can be assumed that the time of capture was hardly less than 500,000 years ago.In geomorphological research, the concept of backward erosion still leaves many questions unanswered. How, and above all at what velocity, backward erosion takes place has not yet been investigated for the time period under consideration.The aim of the proposed project is to approximate the rate of erosive incision and regressive erosion in this model region and to better delimit the time of capturing. Suitable time markers are the valley fillings of the rivers in the form of terrace deposits, but also the travertine and sinter formations of different generations, which were formed after river incision on the valley flanks as a result of crop-out of springs. We will be able to model the backward erosion by mapping and recording of the valley fillings and by extensive dating. With this approach, the proposed project will significantly expand the ideas and the state of knowledge on the phenomenon of backward erosion and make an important contribution to the quaternary landscape development of this model region.