Abstract

The study of the foraminiferal communities from the Paleogene–Neogene reference section at Kvachina Bay in West Kamchatka has made it possible, based on the qualitative composition and the quantitative ratios of the encountered species, to identify 13 layers with foraminifera corresponding to certain intervals of the section and to establish their successive change. The foraminiferal layers are combined into four complex zones. In terms of the distribution scale, the identified zones are regional and are traced in the adjacent regions. The change in the paleocommunities corresponds to the process of evolutionary development of foraminifera, as well as to a change in paleoenvironments. The changes recorded in the composition and the structure of zonal communities are reflected in the stage character of microfauna development.

中文翻译：

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堪察加西部的新生代地层与有孔虫古群落的发展阶段

摘要

对西堪察加半岛Kvachina湾古近纪-新近纪参考断面的有孔虫群落的研究使得根据所遇到物种的定性组成和定量比，有可能鉴定出13层有孔虫，对应于一定间隔的有孔虫。并建立其连续更改。有孔虫层被组合成四个复杂区域。就分布规模而言，识别出的区域是区域性的，并且在相邻区域中被追踪。古群落的变化与有孔虫的进化过程相对应，也与古环境的变化相对应。区域群落组成和结构中记录的变化反映在微动物区系发育的阶段特征上。