Identification and significance of a visible, basalt‐rich Vedde Ash layer in a Late‐glacial sequence on the Isle of Skye, Inner Hebrides, Scotland
Identification and significance of a visible, basalt‐rich Vedde Ash layer in a Late‐glacial sequence on the Isle of Skye, Inner Hebrides, Scotland
复制标题
苏格兰内赫布里底群岛斯凯岛晚冰川序列中可见的富含玄武岩的维德灰层的识别和意义
DOI：
10.1002/jqs.611
复制
发表时间：
2001
影响因子：
2.3
通讯作者：
J. Lowe
中科院分区：
文献类型：
--
作者：
S. Davies;C. Turney;J. Lowe
本文报道了在苏格兰内赫布里底群岛斯凯岛的阿希克湖遗址发现了晚冰河时代可见的火山灰地平线。尽管火山灰碎片的双峰地球化学成分与韦德火山灰（晚冰期层序中众所周知的标记层）的双峰地球化学成分相同。阿希克的地平线以玄武岩碎片和反玻璃化火山灰碎片为主，赋予了该层特有的黑色。此前在不列颠群岛的韦德火山灰层中只报道过流纹岩碎片。这一新证据提出了一些关于控制分布和分布的因素的重要问题。玄武岩火山灰的堆积，以及用于检测远离火山活动中心的盆地中的火山灰碎片的方法 版权所有 © 2001 John Wiley & Sons, Ltd.。
This paper reports the discovery of a visible, tephra horizon of Late‐glacial age from the site of Loch Ashik in the Isle of Skye, the Inner Hebrides, Scotland. Although the tephra shards have a bimodal geochemical composition identical to that of the Vedde Ash (a well known marker horizon within Late‐glacial sequences. The horizon at Ashik is dominated by basaltic shards and devitrified tephra shards, giving the layer its characteristic black colour. Only rhyolitic shards have previously been reported from Vedde Ash horizons in the British Isles. This new evidence raises some important questions about the factors that govern the distribution and accumulation of basaltic tephra, and about the methods used to detect ash shards in basins distal to centres of volcanic activity. Copyright © 2001 John Wiley & Sons, Ltd.