Abstract

Reference sections of friable sediments in central Kamchatka are studied and their present-day state is described. Previous concepts of the Middle Pleistocene age of these sediments are critically examined. Radiocarbon dates performed in the 1980s‒1990s by researchers at the Geological Institute, Russian Academy of Sciences, are revised. It is shown that some (oldest) part of dates did not pass the quality check. Results of the new (2016‒2017) radiocarbon dating agree well with the data accomplished previously and supported later by revision. Based on the combined databank with 65 determinations of different species of the buried organic material and mammal bones, the Late Pleistocene age of sediments is suggested. A new interpretation is proposed for the formation setting of some sequences in the studied sections.

中文翻译：

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堪察加地区晚新世中期新世易碎沉积物参考部分：当今状态和年龄问题，以及研究前景

摘要

研究了堪察加半岛中部易碎沉积物的参考剖面，并描述了它们的当前状态。对这些沉积物的中更新世年龄的先前概念进行了严格审查。俄罗斯科学院地质研究所的研究人员对1980年代至1990年代进行的放射性碳测年进行了修订。显示日期的某些（最旧）部分未通过质量检查。新的（2016-2017年）放射性碳测年的结果与之前完成的数据非常吻合，后来得到了修订的支持。基于对65种不同种类的被埋有机物质和哺乳动物骨骼进行测定的综合数据库，提出了沉积物的晚更新世年龄。对于研究部分中某些序列的形成设置提出了一种新的解释。