Varve thickness record of Diss Mere (UK)@en

The sedimentary record of Diss Mere, a lake in the UK, is 15 m long. Annul laminations (varves) are preserved between 9 and 13 m of sediment depth covering most of the Holocene from ca. 2100 to 10,300 cal BP. Varves consist of a pale lamina made of authigenic calcite crystals deposited in summer, and a dark lamina composed of, primarily, crysophyceae cyst, planktonic centric diatoms, filaments of organic matter and micrite, which represents lake sedimentation during autumn - winter. This dataset contains the varve (annual) thickness record and thickness of the seasonal layers. Data were collected in 2018-2019 and covers a time interval from 2069 to 10290 cal. a BP. Data are at annual resolution. Detailed microfacies analysis, varve counting, and varve thickness measurements were performed on the petrographic thin sections using a Leica (M205C) stereo-zoom petrological microscope with plane- and cross-polarised light, at 80x. Varve counting and varve thickness measurements were performed for each seasonal layer along the ca 4.2 m long sequence of varved sediments.英国湖泊迪斯米尔湖（Diss Mere）的沉积记录总长15米。在9至13米的沉积深度范围内保存有年纹层（varve），其覆盖了全新世约2100至10300校准距今年（cal BP）的绝大部分时段。年纹层由夏季沉积的自生方解石晶体构成的浅色纹层，以及主要由金藻胞囊、浮游中心硅藻、有机质丝状体与微晶灰岩组成的深色纹层构成，后者代表了秋冬季节的湖泊沉积产物。本数据集包含年纹层厚度记录与季节层厚度数据。数据采集于2018至2019年，覆盖的时间区间为2069至10290校准距今年（cal a BP），时间分辨率为年尺度。研究人员借助徕卡（Leica）M205C体视变焦岩石显微镜，在平面偏振光与交叉偏振光模式下以80倍放大倍率对岩石薄片开展了详细的微相分析、年纹层计数及厚度测量工作。针对这套长约4.2米的纹层沉积序列，研究人员对每一个季节层均完成了年纹层计数与厚度测定。