Abstract Distally dispersed tephra layers have become an important tool in the investigation of palaeoenvironmental and archaeological records across the globe. They offer possibilities for the synchronisation and improved chronological control in those records to which they can be traced and hence contribute to an improved understanding of the pattern and timing of environmental and archaeological change during periods of rapid climatic adjustment. However, their use as robust isochronous markers for synchronising records is frequently compromised by uncertainties relating to stratigraphical context, precise chronology and chemical composition. Here we collate and review the tephrostratigraphical information dating to the Last Glacial-Interglacial Transition (LGIT; c. 16-8 ka BP) in the British Isles based on published and unpublished records obtained from 54 sites. Based on details of their stratigraphic position, chronology and chemical composition, we propose that 26 individual eruption events may be represented in this collective record which spans the LGIT. The great majority of these eruptives can be traced in origin to Iceland, but we also report on the recent discoveries of ultra-distal tephra from the North American Cascades range, including for the first time the Mount St Helens J Tephra at a site in southern Ireland. These particular ultra-distal discoveries have resulted from a reinterpretation of older data, demonstrating the potential importance of ‘unknown’ analyses in older tephra datasets. The outcome of this review is a comprehensive but provisional tephrostratigraphic framework for the LGIT in the British Isles, which helps to focus future research on parts of the scheme that are in need of further development or testing. The results, therefore, make an important contribution to the wider European tephrostratigraphic framework, while adding new discoveries of transcontinental isochronous tephra markers.

中文翻译：

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建立火山地层框架以帮助研究突然的气候和冰川转变：不列颠群岛最后一次冰川-间冰期转变的案例研究（c. 16-8 ka BP）

摘要 远端分散的火山灰层已成为全球古环境和考古记录调查的重要工具。它们为同步和改进可追溯的记录中的时间顺序控制提供了可能性，从而有助于更好地了解快速气候调整期间环境和考古变化的模式和时间。然而，它们作为用于同步记录的强大等时标记的使用经常受到与地层背景、精确年代学和化学成分相关的不确定性的影响。在这里，我们整理和回顾了末次冰期-间冰期过渡 (LGIT; c. 16-8 ka BP) 在不列颠群岛基于从 54 个站点获得的已发表和未发表的记录。根据它们的地层位置、年代和化学成分的详细信息，我们建议在这个跨越 LGIT 的集体记录中可以代表 26 个单独的喷发事件。这些火山喷发中的绝大多数可以追溯到冰岛，但我们也报告了最近在北美喀斯喀特山脉发现的超远端火山灰，包括首次在南部一个地点的圣海伦火山 J 火山灰。爱尔兰。这些特殊的超远侧发现源于对旧数据的重新解释，证明了旧 tephra 数据集中“未知”分析的潜在重要性。本次审查的结果是不列颠群岛 LGIT 的综合但临时的火山岩地层框架，有助于将未来的研究重点放在需要进一步开发或测试的方案部分。因此，这些结果对更广泛的欧洲火山地层框架做出了重要贡献，同时增加了横贯大陆等时火山标记的新发现。