A detailed study is presented of a 15.3-m-thick Pleistocene coastal terrace located on the Cantabrian coast (northern Spain). Stratigraphic, sedimentological, topographic and micropalaeontological information is combined with a chronology based on luminescence dating to characterize the deposits. The sedimentary succession records: (i) a basal transgressive system, consisting of a wave-cut surface covered by a lower layer of beach gravels and upper beach pebbly sands; and (ii) a thicker upper highstand system (aggrading), comprising medium to very fine aeolian sands interbedded with thin palustrine muds. Luminescence dating involved a detailed sampling strategy (36 samples and two modern analogues) and the use of both quartz optically stimulated luminescence (OSL) and feldspar post-infrared infrared stimulated luminescence single aliquot regeneration protocols; feldspar results were used to confirm the completeness of bleaching of the quartz OSL signal. The quartz OSL luminescence age–depth relationship shows significant dispersion, but nevertheless two rapid phases of deposition can be clearly identified: one at ~130 ka [Marine Oxygen Isotope Stage (MIS) 5] and one at ~100 ka (MIS 5c). The top of the succession is dated to ~70 ka. The MIS 5e marine maximum flooding surface is identified at an elevation of 6.85 m above mean seal level. This elevation provides evidence of a regional sea-level highstand for this sector of the Cantabrian coast.

中文翻译：

---

Oyambre沿海阶地：伊比利亚北部（西班牙坎塔布连海岸）最后一次冰期阶段的详细沉积记录

详细介绍了位于坎塔布连海岸（西班牙北部）的一个15.3米厚的更新世沿海阶地。将地层学，沉积学，地形学和微古生物学信息与基于发光测年的年代学相结合，以表征沉积物。沉积演替记录：（i）基础海侵系统，由海蚀面覆盖，下海面由沙滩砾石的下层和上海滩卵石状的沙子覆盖；（ii）较厚的上部高台站系统（凝结），由中度至极细的风沙和稀薄的泥浆夹层组成。发光测年涉及详细的采样策略（36个样本和两个现代类似物），以及石英光学激发发光（OSL）和长石后红外红外激发发光单个等分试样再生方案的使用；长石的结果被用来确认石英OSL信号漂白的完整性。石英OSL发光年龄与深度的关系显示出明显的分散性，但是可以清楚地确定沉积的两个快速阶段：一个在〜130 ka [海洋氧同位素阶段（MIS）5]，一个在〜100 ka（MIS 5c）。演替的顶部可以追溯到70 ka。MIS 5e船用最大淹水面是在平均密封高度以上6.85 m处标出的。此高程提供了坎塔布连海岸这一地区区域性海平面高位的证据。