The mid-Palaeozoic biotic crisis: setting the trajectory of tetrapod evolution. Coquetdale, Coldstream and Whitrope Burn, Northern England and the Scottish Borders. (NERC grant NE/J020729/1)

The data set consists of rock samples collected from Coquetdale, Coldstream and Whitrope Burn from 2013-2014; milled material is included. There is an Excel spreadsheet of sample numbers with location, sample height on log, d13C data and %C. There are scans of field logs from Coquetdale, Coldstream and Whitrope Burn, and Illustrator drawn logs from Coldstream which include samples collected at a later date. Scans of thin sections are also included. (thin sections to be kept at Leicester for the time being – still being worked on for papers.) Each locality folder has an Excel spreadsheet detailing samples, sample height, %C and bulk and specific d13C values. These data were used to interpret the environment in which early tetrapods have been found in the early Carboniferous. These data supported the MPhil thesis 'In an alternating marine and non-marine depositional setting, where and how are early Carboniferous tetrapods preserved?' by Sherwin, 2018, and one publication including data from Whitrope Burn - Richards et al., 2018, (https://doi.org/10.1017/S1755691018000166).本数据集涵盖2013至2014年间从科克特代尔（Coquetdale）、科尔德斯特里姆（Coldstream）与惠特罗普本（Whitrope Burn）采集的岩石样本，同时包含研磨后的样品物料。配套有一份Excel电子表格，记录了样本编号、采样位置、岩心测井中的样品高度、碳同位素比值（d13C）数据以及碳百分含量（%C）。本数据集包含科克特代尔、科尔德斯特里姆及惠特罗普本的野外岩心日志扫描件，以及科尔德斯特里姆地区使用Illustrator绘制的岩心测井图件，其中涵盖了后续采集的样本。此外还附有薄片（thin sections）扫描件（目前该类薄片暂存于莱斯特，仍用于相关学术论文的后续研究工作）。每个采样点的专属文件夹中均配有Excel电子表格，详细记录了样本信息、样品岩心高度、碳百分含量、全岩碳同位素比值与特异性碳同位素比值。上述数据被用于解读早石炭世早期四足动物的产出沉积环境。本数据集支撑了Sherwin于2018年完成的哲学硕士论文《在海陆交替沉积环境中，早石炭世四足动物于何处、以何种方式被保存？》，以及一项基于惠特罗普本数据的研究成果：Richards等人2018年发表的学术论文（https://doi.org/10.1017/S1755691018000166）。