Tephra connections between environmental change and human prehistory in Ethiopia

与MER有关的更新世火山作用产生了巨大的火山碎屑沉积，广泛存在于湖泊沉积物和河流阶地等沉积档案中的火山灰岩层中。由于在考古序列中普遍存在非洲非洲人，它们的相互关系和年代测定已经成为埃塞俄比亚(以及更广泛的东非)人的记录年代学的基础。然而，过去火山活动的记录还远远不完整，最近结合火山露头、考古、河流和湖泊沉积序列的工作表明，许多相关性需要用新的样本和最先进的分析方案进行测试。此外，现在已证明有可能使用隐顶方法来填补火山记录中的关键空白，并增加沉积层序中的火山灰等时线的探测和对比。

Pleistocene volcanism associated with the MER produced colossal pyroclastic deposits found widely as tephra layerswithin sedimentary archives such as lake sediments and fluvial terraces. Due to the prevalence of tephra inarchaeological sequences, their correlation and dating has become fundamental to the chronology of the hominin recordin Ethiopia (and in eastern Africa more generally). However, the record of past MER volcanism is far from complete andrecent work combining volcanic outcrop, archaeological, fluvial and lake sediment sequences, has shown that manycorrelations require testing with new samples and state-of-the-art analytical protocols. In addition, there is nowdemonstrated potential to use cryptotephra methods to fill critical gaps in the volcanological record and increase thedetection and correlation of tephra isochrons within sedimentary sequences.