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

安达卢西亚东北部的巴扎/瓜迪克斯盆地面积约为6000平方公里，直到中更新世都是一个内流洼地，其中沉积了来自框架山脉的各种粒度的沉积物。沉积开始于上新世之前不久。后来，该盆地被Rio Guadalquivir的源头所捕获，直到今天，这些源头已经切入沉积物300米深。自捕获以来，海退侵蚀已达到90多公里的河长。捕获发生的时间仍然是科学界激烈讨论的主题，尽管关于这一点的假设在1000 ka和43 ka之间变化。但可以假定捕获的时间几乎不少于50万年前，在地貌研究中，后向侵蚀的概念仍然留下许多未解之谜。如何，最重要的是在什么速度下，向后侵蚀发生尚未调查的时间段正在考虑中，拟议项目的目的是近似的侵蚀切割和后退侵蚀在这个模型区域的速度，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物形式的河谷充填物，还有不同世代的石灰岩和烧结物，它们是由于泉水的断流而在河谷侧翼的河流切割后形成的。我们将能够通过绘制和记录山谷填充物以及广泛的年代测定来模拟向后侵蚀。通过这种方法，拟议的项目将显着扩大的想法和知识状态的现象，向后侵蚀，并作出重要贡献的第四纪景观的发展，这个模型区域。

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.