Marine Oxygen Isotope Stage 11 (MIS 11, Hoxnian Interglacial) is an important interval for understanding both climate change in an interglacial partially analogous to the Holocene and the response of geomorphic processes, biotic systems, and hominin populations to these changes. In Britain, many sites correlated to MIS 11 have not been studied since the mid‐20th century and require reinvestigation, including the Hitchin tufa sequence, where a rich, non‐marine molluscan assemblage was originally recovered. Re‐excavation of the Hitchin tufa sequence for this study was focussed on combined sedimentological, micromorphological and geochemical analyses of the deposits. These indicate that tufa formation occurred within a perched springline system under temperate climatic conditions. Shifts between paludal and fluvial tufa facies within this system occur concomitantly with changes in carbonate geochemistry, representing increased humidity caused by a change in rainfall amount or seasonality. This research enables a correlation of the sequence to the climatic optimum of MIS 11c, the main warm phase of MIS 11, and permits further insights into temperature and hydrological changes in this interval by generating the first geochemical records of hydroclimatic evolution during the MIS 11 thermal maximum in Britain.

中文翻译：

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英国MIS 11的气候最佳环境：来自英格兰东南部希钦的凝灰岩层序的证据

海洋氧同位素第11阶段（MIS 11，霍克森语间冰期）是了解部分与全新世相似的冰间期气候变化以及地貌过程，生物系统和人源素种群对这些变化的响应的重要时间间隔。在英国，自20世纪中叶以来，尚未对许多与MIS 11相关的地点进行过研究，需要重新调查，包括Hitchin石灰石序列，该序列最初回收了丰富的非海洋软体动物组合。这项研究对Hitchin石灰岩层序的重新挖掘主要集中在沉积物的沉积学，微观形态学和地球化学综合分析上。这些表明，在温带气候条件下，石灰岩形成发生在栖息的泉水系统内。在该系统中，胶结岩和河流相灰岩相之间的转换与碳酸盐地球化学的变化同时发生，这表示由于降雨量或季节变化而引起的湿度增加。这项研究可以使序列与MIS 11c的气候最佳状态（MIS 11的主要暖期）相关，并通过生成MIS 11热过程中水文气候演变的第一份地球化学记录，从而进一步了解该区间的温度和水文变化。在英国最大。