Abstract Fluvial terraces are valuable records to study and characterize landscape evolution and river response to base level lowering, and to decipher coupled responses between fluvial incision and regional tectonics. The opening of closed basins has a strong impact on fluvial dynamics, as it involves an abrupt base level lowering that accelerates landscape fluvial dissection. This study focuses on the time response of the Duero Basin, the largest and best preserved among the Cenozoic basins of the Iberian Peninsula, to exorheism. Fluvial incision due to basin opening has developed up to 13 un-paired strath terraces along the south margin of the Duero river, distributed at relative heights up to +136–128 m compared to the modern floodplain. Paired 10Be 26Al cosmogenic isotope depth profiles from six fluvial terraces, located ca. 30–80 km upstream from the opening zone, suggest Pleistocene ages for almost the entire fluvial terrace staircase (from T3 at +112 –107 m, to T12 at +13–11 m). The terrace density and the total lowering of the terrace surface, key parameters in limiting terrace exposure ages, were estimated based on field and geomorphological data. Apparent burial durations and basin denudation rates deduced from inherited 10Be 26Al concentrations provide valuable information on basin evolution. Apparent basin denudation rates remained relatively low (

中文翻译：

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内流排水发展的日期和速率：来自河流阶地的见解（杜罗河，伊比利亚半岛）

摘要 河流阶地是研究和表征景观演化和河流对基线降低的响应，以及解读河流切口与区域构造耦合响应的宝贵记录。封闭盆地的开放对河流动力学有很大的影响，因为它涉及突然的基线降低，加速了景观河流的分离。本研究重点关注杜罗盆地（伊比利亚半岛新生代盆地中最大、保存最完好的盆地）对放流作用的时间响应。由于盆地开放导致的河流切口沿着杜罗河南缘发育了多达 13 个不成对的地层阶地，与现代洪泛平原相比，分布在相对高度可达 +136-128 m。来自六个河流阶地的配对 10Be 26Al 宇宙成因同位素深度剖面，位于约。在开口带上游 30-80 公里处，表明几乎整个河流阶地阶梯的更新世年龄（从 +112-107 m 的 T3，到 +13-11 m 的 T12）。阶地密度和阶地表面的总降低是限制阶地暴露年龄的关键参数，是根据实地和地貌数据估算的。从继承的 10Be 26Al 浓度推导出的表观埋藏持续时间和盆地剥蚀率提供了有关盆地演化的宝贵信息。表观流域剥蚀率仍然相对较低（从继承的 10Be 26Al 浓度推导出的表观埋藏持续时间和盆地剥蚀率提供了有关盆地演化的宝贵信息。表观流域剥蚀率仍然相对较低（从继承的 10Be 26Al 浓度推导出的表观埋藏持续时间和盆地剥蚀率提供了有关盆地演化的宝贵信息。表观流域剥蚀率仍然相对较低（